Foot-pounds to Newton-meters Converter

Convert torque or work values from imperial (ft·lb) to metric (N·m) and back. Uses the standard exact factor: 1 ft·lb = 1.3558179483 N·m.

Enter torque/energy in ft·lb

N·m = ft·lb × 1.3558179483

Reverse: Newton-meters → ft·lb

Enter metric torque

ft·lb = N·m ÷ 1.3558179483

Extra: N·m → in·lb

Formula: in·lb = N·m × 8.85074579

Exact factors used:

1 ft·lb = 1.3558179483 N·m

1 N·m = 0.7375621493 ft·lb

1 N·m = 8.85074579 in·lb

Values rounded for display; calculator keeps high precision.

Quick ft·lb → N·m table

ft·lb N·m Notes
11.356Small torque
56.779Hand tools
1013.558Light torque
5067.791Automotive
100135.582Higher torque

Formula: foot-pounds to newton-meters

N·m = ft·lb × 1.3558179483

Example: 25 ft·lb × 1.3558179483 ≈ 33.895 N·m

Formula: newton-meters to foot-pounds

ft·lb = N·m ÷ 1.3558179483

Example: 40 N·m ÷ 1.3558179483 ≈ 29.502 ft·lb

Torque vs energy note

Both torque and work/energy can be written as “ft·lb” or “N·m”. The numbers are the same for unit conversion, but in context you should say “ft·lb of torque” or “foot-pounds of energy”. This page does the numeric conversion only.

FAQ

1. Why 1.3558179 and not just 1.36?

1.36 is fine for quick estimates, but engineering specs often need more precision, so we keep the factor tied to the exact definition of the foot and the pound-force.

2. How do I go from in·lb to N·m?

First convert in·lb → ft·lb (divide by 12), then ft·lb → N·m. Or use the shortcut 1 in·lb = 0.113 N·m (approx 0.1130).

3. Can I use this for torque wrench settings?

Yes. Read the value in ft·lb or N·m from your procedure, convert here, then set the wrench to the converted unit.