Torque Converter — Nm to ft-lb, ft-lb to Nm Calculator

Torque measures rotational tightening and twisting — force applied at a distance from an axis. European and ISO specs use newton-meters (N·m); US service manuals use foot-pounds (ft·lb); small fasteners use inch-pounds (in·lb); some Asian charts quote kgf·m or kgf·cm. This converter switches between those labels from one input.

Enter a value, pick From and To units, and read the result instantly. All math runs locally in your browser. For straight-line force (N, lbf, kN), use the Force Converter.

Wheel nuts, cylinder heads, and suspension bolts are often specified in N·m in European manuals and ft·lb in US manuals. The conversion is fixed:

ft·lb = N·m × 0.737562  ·  N·m = ft·lb × 1.35582

Quick anchors: 1 N·m ≈ 0.738 ft·lb · 12 N·m ≈ 8.85 ft·lb · 25 N·m ≈ 18.4 ft·lb · 30 N·m ≈ 22.1 ft·lb · 60 N·m ≈ 44.3 ft·lb · 75 N·m ≈ 55.3 ft·lb · 110 N·m ≈ 81.1 ft·lb · 120 N·m ≈ 88.5 ft·lb · 200 N·m ≈ 147.5 ft·lb. Always follow the manufacturer torque chart for your vehicle.

Multiply foot-pounds by 1.35582 to get newton-meters. Common values: 10 ft·lb ≈ 13.6 N·m · 30 ft·lb ≈ 40.7 N·m · 33 ft·lb ≈ 44.7 N·m · 40 ft·lb ≈ 54.2 N·m. The reference table below lists more anchors; enter any value in the converter for readings not on the chart.

One foot-pound equals twelve inch-pounds. Electronics and small bolts often quote in·lb: 120 in·lb = 10 ft·lb ≈ 13.6 N·m. To convert in·lb to N·m, multiply by 0.112985, or convert to ft·lb first by dividing by 12.

Kilogram-force meter (kgf·m) ties to standard gravity: 1 kgf·m ≈ 9.807 N·m. Kilogram-force centimeter (kgf·cm) is common on Asian fastener charts: 1 N·m ≈ 10.20 kgf·cm. Select the matching unit in the dropdown rather than mixing force-only units.

Torque is force times perpendicular lever arm (τ = F × r). One hundred lbf at a two-foot radius equals 200 ft·lb of torque — but 100 lbf alone is not torque. Convert lbf to N on the Force Converter; convert completed torque values here.

Pressure (bar, psi) is force per area, not torque. Hydraulic torque wrenches couple pressure to torque through piston area — that is equipment-specific, not a simple unit factor. See the Pressure Converter for PSI and bar.

• Centrifuge RCF ↔ RPM needs rotor radius (RCF = 1.118 × 10⁻⁵ × r × RPM²) — use a dedicated centrifuge calculator.
• Horsepower from torque needs angular speed: hp ≈ T × RPM / 5252 for ft·lb — RPM is required, not unit conversion alone.
• Wind load and wind speed use aerodynamic formulas on the Wind Speed Converter for speed units only.
• Capstan or winch torque from line tension depends on drum diameter (T = F × r).

For N·m, ft·lb, in·lb, and kgf·m label conversion, this page is the right tool.