Skip to main content

Real Estate & Housing

Browse all 8 real estate & housing tools

What is real estate calculators?

Real estate calculators work out the numbers behind buying, renting and letting property, from a monthly mortgage payment and the deposit you need, to the debt and coverage ratios a lender checks before approving a loan.

Formula & Methodology

💡

Did you know? Most US lenders apply the 28/36 rule: housing costs of no more than 28% of gross monthly income, and total debt payments of no more than 36%. The DTI Calculator on this page runs the same arithmetic an underwriter does.

Sources

  • Consumer Financial Protection Bureau (CFPB): Mortgage estimation and Loan Estimate disclosure rules
  • Federal Housing Finance Agency (FHFA): Conforming loan limits and loan-to-value standards

Frequently Asked Questions

Conventional loans commonly expect 5% to 20% of the purchase price. Putting down less than 20% usually means paying private mortgage insurance. Use the Down Payment Calculator to see the trade-off between a larger deposit and a higher monthly payment.

LTV is the loan amount divided by the property value. Below 80% avoids private mortgage insurance on most conventional loans, and lenders price their best rates at lower LTVs. The LTV Calculator works it out in both directions.

Debt service coverage ratio is net operating income divided by annual debt service. Most lenders look for 1.25 or higher, meaning the rent covers the mortgage with 25% to spare.

Compare the Rent Affordability Calculator against the Mortgage Calculator for the same monthly figure. Buying adds property tax, insurance and maintenance on top of the loan payment, so an equal monthly cost is not an equal total cost.