Loading...
Convert between N·m, ft·lb, in·lb, and more torque units for automotive and engineering.
Torque is a measure of rotational force applied to an object around an axis. It equals force multiplied by the perpendicular distance from the axis, commonly measured in newton-meters (N·m) or foot-pounds (ft·lb).
| Application | N·m | ft·lb |
|---|---|---|
| Lug nuts (car) | 100-140 | 74-103 |
| Spark plugs | 15-30 | 11-22 |
| Head bolts | 60-90 | 44-66 |
| Economy car engine | 150-200 | 110-148 |
| Sports car engine | 400-550 | 295-406 |
| Diesel truck engine | 1,000-1,400 | 738-1,033 |
Multiply newton-meters by 0.7376 to get foot-pounds.
ft·lb = N·m × 0.737562
Multiply foot-pounds by 12 to get inch-pounds (12 inches per foot).
in·lb = ft·lb × 12
Torque equals force times the perpendicular distance from the axis.
τ = F × r
Formula
τ = F × r | 1 N·m = 0.7376 ft·lb | 1 ft·lb = 1.3558 N·mτ (tau) = Torque in newton-metres (N·m)
F = Force applied in newtons (N)
r = Perpendicular distance (moment arm) from the axis in metres (m)
Worked Example
Convert 200 ft·lb to N·m (engine torque)
Did you know? Car engines are rated in both horsepower (power) and torque (rotational force). Torque is what accelerates the car from a stop; power is what sustains high speed. Electric motors produce peak torque instantly from 0 rpm, which is why EVs feel so responsive.
Sources
Convert between degrees, radians, gradians, turns, and arc units for math and science.
Balance chemical equations by finding the correct coefficients for reactants and products.
Calculate radius, diameter, circumference, area, arc length, and sector area from any input.
Convert between kg/m³, g/cm³, lb/ft³, and more. Includes material density reference.
Differentiate polynomial functions with step-by-step power rule application.
Solve C₁V₁ = C₂V₂ for any missing variable in solution dilution problems.