Free Calculators & Converters
Everyday tools to simplify your life. Convert units, crunch numbers, and get answers fast. All free, no signup required.
Automotive calculators help drivers, car buyers, and fleet managers compute vehicle costs, fuel efficiency, and loan payments, from converting MPG to L/100km and estimating monthly car loan payments to understanding the total cost of vehicle ownership.
0-60 MPH Calculator
Estimate 0-60 mph time from horsepower, weight, and drivetrain. Compare with popular cars.
Car Depreciation Calculator
Estimate your car's current value based on age, mileage, and condition with a 5-year depreciation table.
Car Insurance Estimator
Estimate car insurance premiums by age, vehicle, driving record, and coverage level.
Car Lease Calculator
Calculate monthly lease payments from MSRP, residual, money factor, and down payment.
Car Maintenance Schedule Planner
Get a personalized maintenance schedule based on mileage and driving conditions with cost estimates.
Car Payment Affordability Calculator
Find out how much car you can afford based on income, the 20/4/10 rule, and max monthly payment.
Electric Vehicle Range Calculator
Estimate real-world EV range from battery size, efficiency, and temperature conditions.
Engine Displacement Calculator
Calculate engine displacement in cc, liters, and cubic inches from bore, stroke, and cylinders.
EV Charging Cost Calculator
Calculate EV charging cost, time, monthly expense, and annual savings vs gasoline.
Fuel Cost Calculator
Calculate trip, monthly, and annual fuel costs by distance, MPG, and gas price. Compare two vehicles.
Fuel Economy Converter
Convert between MPG, L/100km, and km/L. Includes US and UK gallon conversions.
Gas Mileage Log
Log fill-ups to track MPG, cost per mile, and fuel expense trends over time.
License Plate Lookup Info
Look up US license plate formats, colors, slogans, and fun facts by state.
Oil Change Interval Calculator
Find your ideal oil change interval by oil type, driving conditions, and current mileage.
Road Trip Planner
Plan road trips with fuel stops, cost estimates, and drive time calculations.
Tire Pressure Calculator
Calculate adjusted tire pressure for temperature, altitude, and load conditions.
Towing Capacity Calculator
Calculate max towing capacity from GCVWR, curb weight, and cargo. Check tongue weight safety.
VIN Decoder
Decode any VIN to find manufacturer, country, model year, body type, and check digit validity.
Window Tint Calculator
Calculate net VLT% after tinting and check state legal limits for window tint.
Cooking and kitchen calculators help home cooks and professional chefs scale recipes, convert measurements, calculate alcohol content, find ingredient substitutions, and determine safe cooking temperatures, removing guesswork from every meal.
ABV Calculator
Calculate ABV from original and final gravity. Includes beer and wine style references.
Baking Substitution Calculator
Find substitutions for common baking ingredients with adjusted quantities and texture notes.
Bread Baker's Percentage Calculator
Calculate bread ingredient weights from baker's percentages with preset recipe profiles.
Caffeine Intake Calculator
Track daily caffeine from beverages and foods. Compare against FDA limits with metabolism timeline.
Canning Altitude Adjuster
Adjust canning time and pressure for your elevation with USDA-based correction tables.
Cooking Measurement Converter
Convert between cups, tablespoons, teaspoons, ml, and more for cooking and baking.
Fermentation Timer
Temperature-adjusted fermentation times with countdown timer for bread, yogurt, and more.
Meat Cooking Time Calculator
Calculate cooking time by meat type, weight, and desired doneness with temperature targets.
Pasta Calculator
Calculate dry pasta per person with cooked weight, water, salt, and cook times by shape.
Recipe Scaler
Scale recipe ingredients up or down by servings with smart fractional rounding.
Recipe Unit Converter
Convert recipe units with ingredient-aware weight/volume conversions for accurate baking.
Smoke Point Guide
Compare smoke points for 18+ oils. Filter by cooking method to find the best oil.
Sous Vide Time & Temperature Calculator
Find sous vide time and temperature for any protein with doneness levels and tips.
Spice Substitution Calculator
Find herb and spice substitutions with exact ratios and flavor notes for 15+ spices.
Yeast Converter
Convert between active dry, instant, fresh, and sourdough yeast with exact ratios.
Date and time calculators compute durations, convert timestamps, and calculate astronomical events, from finding the exact number of days between two dates and your precise age to determining sunrise times, moon phases, and jet lag recovery for any location.
Age Calculator
Calculate your exact age in years, months, and days. See days until your next birthday.
Birthday Countdown
Live countdown to your next birthday with zodiac sign and day-of-week info.
Countdown to Date
Live countdown to any future date with days, hours, minutes, and seconds display.
Date Difference Calculator
Find the exact difference between two dates in years, months, days, weeks, and business days.
Day of Year Calculator
Find the ordinal day number for any date with days remaining and year progress.
Jet Lag Calculator
Calculate jet lag recovery time and get direction-specific tips for any international flight.
Leap Year Checker
Check if any year is a leap year and find next/previous leap years instantly.
Moon Phase Calculator
Find the moon phase for any date. See illumination, moon age, and all 8 phase names.
Sunrise/Sunset Calculator
Find sunrise, sunset, solar noon, and day length for any city or coordinates.
Time Duration Calculator
Add or subtract time values and convert between hours, minutes, seconds, and decimal hours.
Time Zone Converter
Convert time between 60+ world time zones. Compare cities, handle DST, and copy results.
Timezone Abbreviation Lookup
Look up timezone abbreviations with UTC offsets, full names, and regions.
Week Number Calculator
Find the ISO week number for any date with a full year calendar view.
Work Days Calculator
Count business days between dates, excluding weekends and US federal holidays.
World Clock
Display current time in multiple world cities simultaneously with DST handling.
Education and academic tools help students, teachers, and researchers with calculations common in academic settings, from GPA computation and grade point analysis to statistical calculations, study planning, and academic research tools.
ACT/SAT Score Converter
Convert ACT to SAT scores (and vice versa) using official concordance tables.
APA/MLA Format Checker
Check your paper for APA or MLA formatting compliance with a quick self-check tool.
Citation Generator
Generate formatted citations in APA, MLA, Chicago, and Harvard styles.
Essay Word Goal Tracker
Track essay writing progress with real-time word count, page estimates, and time remaining.
Final Grade Calculator
Find out what you need on the final exam to get your desired course grade.
Flashcard Maker
Create and study flashcards with active recall and progress tracking.
GPA Calculator
Calculate your GPA from courses, grades, and credits on the standard 4.0 scale.
Grading Curve Calculator
Apply curves to exam scores with add-points, scale, or square root methods.
Homework Planner
Track homework assignments by subject, due date, and priority with completion status.
Math Practice Generator
Generate customizable math problems by operation and difficulty with instant answer checking.
Plagiarism Self-Check
Self-check your writing for internal repetition, duplicate sentences, and overused phrases.
Reading Level Analyzer
Analyze text readability with Flesch-Kincaid and Gunning Fog scores and grade levels.
Reading Time Calculator
Estimate reading, speaking, and study time for any text with customizable WPM.
Scholarship Calculator
Calculate how scholarships reduce college costs. See total savings and remaining expenses.
Student Loan Calculator
Calculate student loan payments with standard, graduated, and extended repayment plan comparison.
Study Timer
Pomodoro-style timer with customizable focus and break intervals.
Typing Speed Test
Test typing speed in WPM with accuracy tracking and multiple difficulty levels.
Unit Circle Reference Tool
Interactive unit circle with exact trig values, quadrant filtering, and ASTC sign rule.
Weighted Grade Calculator
Calculate your course grade from weighted categories like exams, homework, and projects.
Word Count Calculator
Count words, pages, and writing stats for essays and academic papers.
Financial calculators are tools that use mathematical formulas to help you plan, analyze, and optimize money decisions, from calculating loan payments and investment returns to tax estimates and retirement projections.
Alimony Calculator
Estimate monthly spousal support using income disparity and marriage length. Educational use only.
Amortization Calculator
Generate a full amortization schedule showing each payment's principal and interest split.
Auto Loan Calculator
Calculate auto loan payments with down payment, trade-in, and amortization schedule.
Break-Even Calculator
Find break-even units and revenue. Analyze profit at any volume with contribution margin.
Capital Gains Tax Calculator
Calculate capital gains tax with short-term and long-term rates. Includes NIIT and residence exclusion.
CAPM Calculator
Calculate expected returns using CAPM based on beta, risk-free rate, and market return.
Cash Flow Calculator
Calculate cash flow from operations, investing, and financing to analyze business health.
CD (Certificate of Deposit) Calculator
Calculate CD interest earned and maturity value. Compare rates and terms.
Child Support Calculator
Estimate child support using the Income Shares Model based on both parents' incomes.
Commission Calculator
Calculate flat, tiered, or split sales commissions with tax withholding estimates.
Compound Interest Calculator
Calculate compound interest with contributions, compounding frequency, and year-by-year growth breakdown.
Credit Card Payoff Calculator
Calculate credit card payoff time and interest. Compare minimum vs. extra payments.
Cryptocurrency Converter
Convert between BTC, ETH, and 20+ cryptocurrencies with reference rates. Educational use.
Currency Converter
Convert between major world currencies instantly. Quick reference tables and popular pairs included.
Debt Snowball/Avalanche Calculator
Compare snowball and avalanche debt payoff strategies side by side to find the fastest, cheapest path.
Depreciation Calculator
Calculate depreciation with straight-line, DDB, SYD, and MACRS methods. Full schedule included.
Discount Calculator
Calculate final prices after single or stacked discounts. See savings and effective discount percentage.
Dividend Calculator
Calculate dividend income, yield, and DRIP growth projections over time.
Down Payment Calculator
Calculate down payment needed and savings timeline. Compare 3%, 5%, 10%, 20% scenarios.
DSCR Calculator
Calculate DSCR to see if your income covers debt payments for loan qualification.
DTI Calculator
Calculate DTI ratio to see if you qualify for a mortgage based on your income and debts.
Estate Tax Calculator
Estimate federal estate tax with 2024 exemption and progressive brackets (18–40%).
FIRE Calculator
Calculate your FIRE number and years to financial independence using the 4% rule.
Gold Price Calculator
Calculate gold value by weight and karat purity using a reference spot price.
Home Equity Calculator
Calculate home equity, LTV ratio, and HELOC borrowing eligibility based on your home value.
Hourly to Salary Converter
Convert hourly rates to annual salary with overtime, PTO, and take-home estimates.
Income Tax Calculator
Calculate federal income tax with 2024 brackets, deductions, and credits.
Inflation Calculator
Calculate purchasing power changes using historical CPI data. See what money was worth then vs. now.
IRR Calculator
Find the discount rate that makes NPV zero. Compare IRR to your required rate of return.
Lease vs. Buy Calculator
Compare total costs of leasing vs. buying a vehicle with equity and break-even analysis.
Loan/EMI Calculator
Calculate monthly EMI, total interest, and repayment schedule for personal, auto, or any loan.
LTV Calculator
Calculate LTV ratio to determine PMI requirements, equity, and lending eligibility.
Markup & Margin Calculator
Calculate markup, margin, cost, and selling price. Convert between markup and margin percentages.
MIRR Calculator
Calculate MIRR with separate finance and reinvestment rates for more realistic returns.
Mortgage Calculator
Calculate monthly mortgage payments, total interest, and view amortization schedules with optional costs.
Net Worth Calculator
Calculate your net worth from assets and liabilities. Track your financial health.
NPV Calculator
Calculate NPV to evaluate investments. Discount future cash flows and determine profitability.
Payback Period Calculator
Calculate how long it takes to recover your investment with cumulative cash flow analysis.
Profit Margin Calculator
Calculate gross, operating, and net profit margins with income statement breakdown.
Rent Affordability Calculator
Calculate max affordable rent using the 30% rule and 50/30/20 framework based on your income.
Rental Property ROI Calculator
Calculate cap rate, cash-on-cash return, NOI, and monthly cash flow for rental properties.
Retirement/401k Calculator
Project retirement savings with 401(k) contributions, employer match, and growth.
ROI Calculator
Calculate ROI percentage, annualized returns, and total gain/loss for any investment.
Salary/Paycheck Calculator
Calculate take-home pay per paycheck after all taxes and deductions.
Sales Tax Calculator
Calculate total with tax or extract tax from a total. Quick tax rate buttons for common rates.
Savings Goal Calculator
Calculate monthly savings needed to reach any financial goal with compound interest.
Social Security Benefits Calculator
Estimate Social Security monthly benefit using AIME, bend points, and your claiming age.
Stock Profit/Loss Calculator
Calculate stock profit/loss with commissions, capital gains tax estimate, and annualized return.
Tip Calculator
Calculate tips easily with quick percentage options and bill splitting for groups.
VAT Calculator
Add or remove VAT from any price. Supports UK, EU, and custom rates.
Working Capital Calculator
Calculate working capital and liquidity ratios to analyze business financial health.
Health and fitness calculators use validated formulas, such as the Mifflin-St Jeor equation for calorie estimation and the US Navy method for body fat, to give you personalized metrics based on your body measurements and goals.
Basal Metabolic Rate (BMR) Calculator
Calculate BMR using 3 validated formulas. See daily calorie needs by activity level.
Blood Alcohol Calculator (BAC)
Estimate BAC using the Widmark formula. Enter drinks, weight, and hours to gauge impairment.
BMI Calculator
Calculate BMI and see your weight category. Includes healthy weight range for your height.
Body Fat Calculator
Calculate body fat percentage using the US Navy method with simple body measurements.
Calorie Calculator
Calculate daily calorie needs with BMR and TDEE. Get targets for weight loss, maintenance, or gain.
Gestational Age Calculator
Calculate gestational age from your LMP. See due date, trimester, and milestones.
Heart Rate Zone Calculator
Find your 5 heart rate training zones using age or resting HR. Supports Karvonen method.
Ideal Weight Calculator
Calculate your ideal weight using 4 formulas: Devine, Robinson, Miller, and Hamwi.
Intermittent Fasting Calculator
Calculate fasting and eating windows for 16:8, 18:6, 20:4, and OMAD protocols.
Keto Calculator
Calculate keto macros with net carb, fat, and protein targets based on your TDEE and goals.
Lean Body Mass Calculator
Calculate lean body mass using 3 scientific formulas from your weight and height.
Life Expectancy Calculator
Estimate life expectancy based on age, gender, smoking, exercise, and BMI factors.
Macro Calculator
Calculate daily protein, carb, and fat targets using TDEE and goal-based macro presets.
Medication Dosage Calculator
Calculate weight-based medication doses and liquid volumes using mg/kg formulas.
Menstrual Cycle Calculator
Predict next periods, fertile windows, and ovulation dates from your cycle length.
One Rep Max Calculator
Calculate your 1RM using 3 formulas and see a loading chart for rep ranges.
Ovulation Calculator
Find your ovulation day and fertile window from last period date and cycle length.
Pregnancy Due Date Calculator
Calculate your due date from LMP or conception. See week-by-week progress and milestones.
Protein Intake Calculator
Find your daily protein target in grams based on weight, activity, and fitness goal.
Running Pace Calculator
Calculate pace, finish time, or distance for any run. Projects 5K to marathon finish times.
Smoking Cost Calculator
Calculate the financial cost of smoking and see what you could save by quitting.
Sobriety Calculator
Track days sober, money saved, and recovery milestones on your sobriety journey.
Steps to Miles Calculator
Convert steps to miles, km, and calories burned using your height and weight.
TDEE Calculator
Calculate daily calories burned and recommended macros for your activity level and goals.
VO2 Max Calculator
Estimate VO2 Max from a run test, walk test, or resting heart rate. See fitness category.
Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio and see WHO health risk classification.
Water Intake Calculator
Calculate how much water you need daily based on weight, activity, and climate.
Home and DIY calculators help homeowners, contractors, and renovators estimate materials and costs for common projects, from calculating gallons of paint needed and flooring square footage to gravel for landscaping and electricity running costs for appliances.
BTU Calculator
Calculate heating and cooling BTU needs by room size, insulation, and windows.
Concrete Calculator
Estimate cubic yards of concrete needed with bag counts and cost estimate.
Deck Board Calculator
Calculate deck boards, joists, and fasteners needed with waste factor.
Drywall Calculator
Estimate drywall sheets needed for walls and ceilings with tape and screw counts.
Electricity Cost Calculator
Calculate appliance energy costs by wattage, usage hours, and electricity rate.
Fence Material Calculator
Calculate posts, rails, and pickets needed for your fence project.
Flooring Calculator
Estimate flooring material needed with waste factor and total project cost.
Gravel/Mulch Calculator
Determine volume, weight, and bags of landscaping material for your project area.
HVAC Duct Size Calculator
Calculate duct diameter and rectangular dimensions from CFM airflow requirements.
Insulation R-Value Calculator
Calculate insulation R-value by material and thickness. Compare against Energy Star standards.
Lawn Fertilizer Calculator
Calculate fertilizer quantity based on lawn area, NPK ratio, and application rate.
Lumber Calculator
Calculate board feet from lumber dimensions with cost per board foot estimate.
Paint Calculator
Estimate gallons of paint needed for any room with cost and coverage details.
Pool Volume Calculator
Calculate pool water volume in gallons and liters for any pool shape.
Roof Pitch Calculator
Convert roof pitch between ratio, degrees, and percentage with material recommendations.
Shed Material Calculator
Estimate shed framing lumber, siding, roofing, and foundation materials from dimensions.
Solar Panel Savings Calculator
Estimate solar panel savings, payback period, and 25-year return on investment.
Square Footage Calculator
Calculate area for rooms, flooring, and paint. Includes material estimates and cost calculator.
Stair Calculator
Calculate riser height, tread depth, and stringer length with code validation.
Tile Pattern Calculator
Calculate tiles needed for various layout patterns with waste by pattern type.
Wallpaper Calculator
Estimate wallpaper rolls needed accounting for pattern repeat and openings.
Water Heater Sizing Calculator
Get water heater size recommendations based on household size and peak demand.
Lifestyle and fun calculators make everyday decisions easier and more entertaining, from splitting a restaurant bill with tip and calculating your exact age in days to finding your zodiac sign compatibility and checking if it's safe to drive after a few drinks.
Baby Name Generator
Generate random baby name ideas filtered by gender and cultural origin.
Biorhythm Calculator
See your physical, emotional, and intellectual biorhythm cycles from your birth date.
Chinese Zodiac Calculator
Find your Chinese zodiac animal and element by birth year with personality traits.
Coin Flip Simulator
Flip virtual coins with fair 50/50 odds. Track heads vs tails stats over time.
Color Personality Quiz
Discover your color personality archetype with a fun 5-question quiz.
Dice Roller
Roll virtual dice (D4–D100) with history tracking. Perfect for RPGs and board games.
Dog Age Calculator
Convert dog years to human years by breed size. See life stage and aging comparison.
Lottery Odds Calculator
Calculate jackpot odds for any lottery. Compare Powerball, Mega Millions, and more.
Love Calculator
Enter two names for a fun love compatibility score. Share the results with friends!
Lucky Number Generator
Generate random lucky numbers with custom range and presets for popular lotteries.
Magic 8 Ball
Shake the Magic 8 Ball for a random answer to your yes-or-no questions.
Name Meaning Calculator
Explore your name's meaning through letter traits, energy analysis, and numerology.
Numerology Calculator
Calculate Life Path and Expression numbers from your birth date and name.
Personality Type (MBTI) Guide
Find your MBTI personality type with a quiz. Explore all 16 types with strengths and careers.
Random Color Generator
Generate random colors with HEX, RGB, and HSL values. Save favorites to a palette.
Spirit Animal Quiz
Discover your spirit animal with a fun 5-question personality quiz.
Trivia Quiz Generator
Test your knowledge with randomized trivia quizzes across multiple categories.
Would You Rather Generator
Play Would You Rather with curated dilemmas. Great for parties and icebreakers.
Zodiac Sign Calculator
Find your zodiac sign, element, and ruling planet by birthday. Explore all 12 signs.
Math and science calculators apply unit conversion formulas and mathematical operations, from percentage calculations and angle conversions to torque, force, and illuminance, giving instant, accurate results for engineering, physics, and everyday problem-solving.
Angle Converter
Convert between degrees, radians, gradians, turns, and arc units for math and science.
Chemical Equation Balancer
Balance chemical equations by finding the correct coefficients for reactants and products.
Circle Calculator
Calculate radius, diameter, circumference, area, arc length, and sector area from any input.
Density Converter
Convert between kg/m³, g/cm³, lb/ft³, and more. Includes material density reference.
Derivative Calculator
Differentiate polynomial functions with step-by-step power rule application.
Dilution Calculator
Solve C₁V₁ = C₂V₂ for any missing variable in solution dilution problems.
Distance Formula Calculator
Find the straight-line distance between two coordinate points with step-by-step working.
Equation Solver
Solve single linear equations and systems of 2 equations with step-by-step working.
Force Converter
Convert between newtons, pounds-force, dynes, kgf, and more force units.
Fraction Calculator
Add, subtract, multiply, divide, and simplify fractions with step-by-step working.
Frequency Converter
Convert between Hz, kHz, MHz, GHz, RPM, and rad/s for electronics and engineering.
Graphing Calculator
Plot y=f(x) on an interactive graph with multiple functions and adjustable windows.
Half-Life Calculator
Calculate radioactive or exponential decay: remaining amount, half-life, or time elapsed.
Illuminance Converter
Convert between lux, foot-candles, phot, and other light measurement units.
Integral Calculator
Integrate polynomial functions with step-by-step power rule application.
Logarithm Calculator
Calculate log, antilog, and change of base for any base including ln and log₂.
Matrix Calculator
Add, multiply, transpose, and find determinants of matrices up to 4×4.
Midpoint Calculator
Find the midpoint between two coordinate points with step-by-step calculation.
Molar Mass Calculator
Calculate molar mass from chemical formulas with element-by-element atomic mass breakdown.
Percentage Calculator
Calculate percentages with 4 modes: X% of Y, X is what % of Y, increase/decrease, and find original.
Percentage Change Calculator
Calculate percentage increase or decrease between two values. Shows absolute and relative change.
Permutation & Combination Calculator
Calculate nPr and nCr with step-by-step factorial breakdowns and reference table.
Prime Number Checker
Check primality, find primes in a range, and factorize numbers into prime factors.
Probability Calculator
Calculate single event, AND, OR, and complement probabilities with formulas shown.
Pythagorean Theorem Calculator
Find the missing side of a right triangle using a² + b² = c², plus area and perimeter.
Quadratic Equation Solver
Solve ax² + bx + c = 0. Shows discriminant, real/complex roots, vertex, and axis of symmetry.
Random Number Generator
Generate random integers or decimals in any range with optional duplicate prevention.
Scientific Calculator
Trig, log, exponents, factorials, memory, and constants in DEG/RAD modes.
Scientific Notation Converter
Convert between decimal, scientific notation, engineering notation, and E notation.
Significant Figures Calculator
Count significant figures and round numbers to any precision with rules explained.
Slope Calculator
Calculate slope, y-intercept, line equation, and perpendicular slope from two points.
Statistics Calculator
Calculate mean, median, mode, standard deviation, variance, and more from any dataset.
Torque Converter
Convert between N·m, ft·lb, in·lb, and more torque units for automotive and engineering.
Triangle Calculator
Calculate area, angles, heights, and type from three side lengths using Heron's formula.
Productivity tools are browser-based utilities that help individuals and professionals accomplish everyday tasks more efficiently, from generating secure passwords and professional invoices to creating QR codes, tracking billable hours, and managing to-do lists without downloading any software.
Countdown Timer
Set a countdown with start/pause/reset and audio alert. Quick presets included.
Daily Standup Generator
Generate formatted standup updates with yesterday, today, and blockers for async teams.
Eisenhower Matrix
Sort tasks by urgency and importance into four action quadrants.
Expense Tracker
Track expenses by category with totals and summaries. Data saved locally — no signup.
Habit Tracker
Track daily habits with streaks, completion rates, and a 30-day visual grid.
Invoice Generator
Create professional invoices with line items, tax, and discounts. Export as PDF instantly.
Kanban Board
Drag-and-drop task board with To Do, In Progress, and Done columns. Saved locally.
Lorem Ipsum Generator
Generate placeholder text for design mockups. Create paragraphs, sentences, or words instantly.
Meeting Cost Calculator
Calculate the true cost of meetings from attendees, salaries, and duration.
Note Taker
Create, edit, and search notes in your browser. Auto-saved locally — no signup needed.
Password Generator
Generate strong random passwords with customizable length and character options.
Pomodoro Timer
Focus timer with configurable sessions, auto-breaks, and session tracking.
QR Code Generator
Generate QR codes for URLs and text. Customize colors and size, download as PNG or SVG.
Simple Time Tracker
Track time for projects or tasks. Add an hourly rate to calculate earnings and export to CSV.
SMART Goal Builder
Build goals that are Specific, Measurable, Achievable, Relevant, and Time-bound.
Stopwatch
Millisecond-precision stopwatch with lap timer, start/stop/reset, and lap history table.
To Do List
Manage your tasks with a simple to-do list. Tasks persist in your browser.
Tech and developer tools are browser-based utilities that help designers, developers, and technical users with everyday tasks, from generating CSS code and converting colors to formatting JSON, decoding JWT tokens, and calculating network bandwidth, all without installing software.
ASCII Converter
Convert text to ASCII codes and back. Supports decimal, hex, binary, and octal formats.
Aspect Ratio Calculator
Convert width/height to aspect ratios, scale dimensions, and generate responsive embed CSS for any layout.
Bandwidth Calculator
Calculate required internet bandwidth based on devices and activities in your household.
Base64 Encoder/Decoder
Encode and decode Base64 strings. Convert text for data URIs, APIs, and safe data transmission.
Border Radius Generator
Create CSS border-radius with visual controls for each corner. Generate circles, pills, and custom shapes.
Box Shadow Generator
Create CSS box shadows with multiple layers, live preview, and copy-ready code.
Color Blindness Simulator
Preview how colors appear with different types of color blindness. Test accessibility for color vision deficiency.
Color Converter
Convert colors between HEX, RGB, HSL, and OKLCH. Includes alpha support and copy buttons for CSS-ready formats.
Color Palette Generator
Create harmonious color schemes from a base color. Generate complementary, analogous, triadic, and more.
Color Picker
Pick any color and get HEX, RGB, HSL, and CMYK values with one-click copy.
Cron Expression Generator
Build cron schedules interactively with human-readable descriptions and next run previews.
CSS Animation Generator
Create CSS keyframe animations visually with timing controls and live preview.
CSS Clamp() Generator
Generate clamp() values for fluid type and spacing. Set min/max sizes, breakpoints, and copy ready-to-use CSS.
CSS Filter Generator
Create CSS filter effects with blur, brightness, contrast, grayscale, and more with live preview.
CSS Flexbox Generator
Create flexbox layouts visually with live preview. Configure container and item properties.
CSS Grid Calculator
Calculate column widths from container size, columns, and gutter. Great for layout planning and design-to-dev handoff.
CSS Transform Generator
Create CSS transforms visually. Configure translate, rotate, scale, skew with live preview.
Data Storage Converter
Convert between GB, TB, MB, KB, and more. Quick reference for common storage sizes.
Data Transfer Rate Converter
Convert between Mbps, Gbps, MB/s, and more. Calculate download times for any file size.
Diff Checker
Compare two texts and highlight differences. See added, removed, and unchanged lines.
Download/Upload Speed Calculator
Calculate download times based on file size and connection speed. Convert Mbps to MB/s.
Favicon Generator
Generate favicons from images or text. Preview at multiple sizes and download as ICO or PNG.
File Size Converter
Convert between bytes, KB, MB, GB, TB and binary units. Understand decimal vs binary file sizes.
Font Pairing Tool
Preview curated Google Font pairings with live text and copy-ready CSS snippets.
Google Ads Revenue Calculator
Estimate clicks, conversions, revenue, ROAS, CPA, and net profit from your Google Ads budget.
Gradient Generator
Create CSS linear, radial, and conic gradients with multiple color stops and live preview.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes for text and verification.
HTML Character Entities
Searchable reference for HTML entities, numeric codes, and hex codes for every special character.
HTML Entity Encoder
Encode and decode HTML entities. Convert special characters for safe HTML display.
Image Format Converter
Convert images between PNG, JPG, WEBP, and GIF formats. Adjust quality and compare file sizes.
Image Generation Aspect Presets
Pick social sizes and aspect ratios for image generation. Copy prompt snippets and recommended dimensions for each platform.
Image Resizer
Resize, crop, rotate, and compress images. Change aspect ratios and convert between formats.
JSON Formatter & Validator
Format, validate, and minify JSON. Find syntax errors and prettify with proper indentation.
JSON to CSV Converter
Convert JSON arrays to CSV format and CSV to JSON. Handles nested objects and auto-detects types.
JWT Decoder
Decode and inspect JSON Web Tokens. View header, payload claims, and expiration status.
Markdown Preview
Write and preview Markdown in real-time. Supports GFM with tables, task lists, and code blocks.
Meta Tag Generator
Generate SEO, Open Graph, and Twitter Card meta tags with live Google/social previews.
npm Package Prompts
Browse popular npm packages by category and copy install commands with one click.
Number Base Converter
Convert between binary, decimal, hexadecimal, and octal number systems.
OpenGraph Preview
Preview how your links appear on Facebook, Twitter, LinkedIn, and Slack with Open Graph tags.
PDF Compressor
Compress PDF files by optimizing images and stripping metadata. Private, browser-based processing.
PDF Form Filler
Fill in fillable PDF form fields online. Auto-detects text, checkbox, dropdown, and radio fields.
PDF Merger
Combine multiple PDF files into one document. Reorder, preview page counts, and download instantly.
PDF Page Organizer
Reorder, rotate, and delete PDF pages with drag-and-drop. Fully browser-based.
PDF Password Protector
Encrypt PDFs with user and owner passwords. AES-256 encryption, fully browser-based.
PDF Splitter
Extract specific pages or split every page into separate PDFs. Private, browser-based processing.
PDF to Image Converter
Export PDF pages as PNG or JPEG images. Adjust resolution, preview thumbnails, and batch download.
PDF Watermark
Add text or image watermarks to PDF pages. Customize opacity, rotation, and position.
Placeholder Image Generator
Generate custom placeholder images with configurable size, colors, and text. Download as SVG or PNG.
PX <-> REM <-> EM <-> INCHES Converter
Convert px to rem, em, and inches instantly. Adjust root font-size, context font-size, DPI, and rounding. Quick reference tables included.
Regex Tester
Test regular expressions with real-time matching, flags, and highlighted results.
Robots.txt Generator
Generate valid robots.txt files with presets, custom rules, and sitemap references.
Roman Numeral Converter
Convert between decimal numbers and Roman numerals (I, V, X, L, C, D, M).
Screen Resolution Calculator
Calculate PPI, pixel density, and aspect ratio for any screen resolution and size.
Spacing Scale & Tokens Generator
Generate 4pt/8pt spacing scales and export token names/values. Includes Tailwind-friendly outputs for fast setup.
Special Characters & Shortcuts
Find and copy special characters, symbols, and keyboard shortcuts for Mac and Windows.
SQL Formatter
Auto-format and beautify SQL queries with proper indentation and keyword uppercasing.
Subnet/IP Calculator
Calculate subnet masks, network ranges, and usable hosts from IP addresses and CIDR notation.
SVG Converter
Convert SVG to PNG/JPG/WEBP or trace raster images to SVG. Batch support and ZIP download.
Tailwind CSS Generator
Visual builder for common Tailwind CSS patterns with live preview and copy.
Text Transform
Convert text to uppercase, lowercase, title case, sentence case, slug format, and more.
Type Scale Generator
Build a modular type scale with headings/body presets, responsive steps, and token-friendly output for design systems.
Unix Timestamp Converter
Convert Unix timestamps to dates and dates to timestamps. Supports seconds and milliseconds.
URL Encoder/Decoder
Encode and decode URLs and query strings. Convert special characters for safe URL transmission.
UUID Generator
Generate random UUID v4 identifiers for databases, APIs, and development.
Video Bitrate Calculator
Calculate video file sizes from bitrate or find required bitrate for target size.
WCAG Contrast Checker
Check text/background contrast for WCAG compliance. Get AA/AAA results and suggested color tweaks that pass.
Word & Character Counter
Count words, characters (with/without spaces), sentences, and reading time. Track remaining characters for common limits.
Travel and geography tools help travelers, planners, and geography enthusiasts calculate time differences, distances, currency conversions, and travel logistics, making it easier to plan international trips, understand time zones, and navigate global measurements.
Airport Code Lookup
Search IATA airport codes by city, country, or code for 50 major airports worldwide.
Carbon Footprint Calculator
Estimate your annual CO₂ emissions from driving, flying, energy, and diet.
Country Size Comparison
Compare the land area of any two countries with ratios and geographic context.
Currency Exchange History Viewer
View 10-year exchange rate trends for major currencies with stats and visual charts.
Currency Tip Calculator
Calculate tips abroad with tipping customs by country and currency conversion.
Distance Between Cities Calculator
Calculate the great circle distance between any two locations from coordinates.
Driving Distance Calculator
Estimate road distance and drive time from air distance with road type factors.
Flight Time Calculator
Estimate flight duration between cities based on distance and cruising speed.
Hotel Budget Calculator
Estimate hotel costs by city and tier. Compare budget, mid-range, and luxury options.
Latitude/Longitude Converter
Convert coordinates between DMS and Decimal Degrees formats instantly.
Luggage Weight Calculator
Itemize your packing list and check weight against airline limits to avoid fees.
Packing List Generator
Generate a custom packing checklist by trip type, duration, and climate.
Time Zone Meeting Planner
Find overlapping business hours across time zones to schedule global meetings.
Travel Budget Calculator
Plan and track your trip expenses by category with daily budget averages.
Trip Cost Splitter
Split group travel expenses fairly and calculate who owes whom.
Visa Requirement Checker
Check visa requirements by nationality and destination with stay duration and notes.
World Population Clock
Watch the world population grow in real time with births, deaths, and growth stats.
Unit converters transform measurements from one system or unit to another using exact conversion factors, such as 1 mile = 1.60934 km or 1 pound = 453.592 grams, making it easy to work across metric, imperial, and US customary measurement systems.
Area Converter
Convert between square feet, square meters, acres, hectares, and more with quick reference tables.
Bra Size Calculator
Convert bra sizes between US, UK, EU, AU, and FR/IT systems. Enter band and cup size to see all equivalents.
Energy Converter
Convert between joules, calories, kWh, BTU, and more. Includes food calorie conversions.
Imperial Volume Converter
Convert UK gallons, pints, and fluid ounces to liters and milliliters. Compare US vs UK sizes.
Length/Distance Converter
Convert between miles, kilometers, meters, feet, yards, and inches with quick reference tables.
Material Volume↔Weight Calculator
Convert volume to weight (or weight to volume) for 24 common materials using density lookup.
Power Converter
Convert between watts, horsepower, BTU/hr, and more. Includes mechanical and metric hp.
Pressure Converter
Convert between PSI, bar, atm, kPa, and more with quick reference tables.
Ring Size Converter
Convert ring sizes between US, UK, EU, Japanese, and Swiss sizing systems instantly.
Shoe Size Converter
Convert shoe sizes between US, UK, EU, and CM systems for men, women, and kids.
Speed Converter
Convert between mph, km/h, m/s, knots, and ft/s with quick reference tables.
Temperature Converter
Convert between Fahrenheit, Celsius, and Kelvin with quick reference tables and formulas.
Time Converter
Convert between hours, minutes, seconds, days, weeks, and milliseconds with quick reference tables.
Tire Size Converter
Decode metric tire sizes (225/55R17) and calculate overall diameter, sidewall height, and revolutions per mile.
Volume Converter
Convert between gallons, liters, cups, milliliters, and more with quick reference tables.
Weight/Mass Converter
Convert between pounds, kilograms, grams, ounces, stones, and milligrams with live updates.
Weather calculators use astronomical formulas and meteorological data to compute sunrise and sunset times, moon phases, temperature conversions, and other environmental metrics for any date and location on Earth.
Air Quality Index Calculator
Calculate AQI from pollutant concentrations with EPA breakpoints and health guidance.
Barometric Pressure Converter
Convert between pressure units with altitude correction and weather condition guide.
Clothing Weather Guide
Get clothing recommendations based on temperature, wind, rain, and activity level.
Dew Point Calculator
Calculate dew point from temperature and humidity. See comfort levels instantly.
Feels Like Temperature
Calculate feels-like temperature combining Wind Chill and Heat Index formulas.
Frost Date Calculator
Estimate frost dates by USDA zone with growing season and planting window calculations.
Growing Season Calculator
Calculate growing season length and planting windows from USDA frost zone data.
Heat Index Calculator
Calculate feels-like temperature in heat with NWS danger levels and safety tips.
Humidity Converter
Convert between relative, absolute, mixing ratio, and specific humidity values.
Lightning Distance Calculator
Calculate lightning distance from the flash-to-thunder delay using speed of sound.
Outdoor Event Weather Planner
Score weather suitability for outdoor events with tips and risk alerts.
Pollen Season Predictor
Predict pollen peaks by region and allergen type with seasonal calendar and tips.
Rainfall Volume Calculator
Calculate water volume collected from rainfall for rain barrels and irrigation planning.
Snow Day Predictor
Predict snow day likelihood based on snowfall, temperature, wind, and region type.
UV Index Calculator
Estimate safe sun exposure time with SPF recommendations by skin type and UV level.
Wind Chill Calculator
Calculate feels-like temperature from air temp and wind speed with frostbite risk levels.
Wind Chill vs Heat Index Comparison
Compare wind chill and heat index side by side with reference charts and risk levels.
Simple Tools, Quick Answers
MyCalculator.to offers a growing collection of practical calculators and converters for everyday tasks. Whether you're figuring out a tip, converting measurements, managing finances, or working on a project, our tools help you get answers fast. Everything runs in your browser: no downloads, no accounts required.