Foot-Pounds to Newton-Meters

Convert Foot-Pounds to Newton-Meters

"Foot-Pounds to Newton-Meters" Calculator

How to convert foot-pounds to newton-meters

Worked example: 100 ft-lb ≈ 135.58 N·m

100 ft-lb × 1.3558179483314004 ≈ 135.58 N·m

Rule: newton-meters = foot-pounds × 1.3558179483314004 — exact: 1 ft-lb = 1.3558179483314004 N·m.

Most asked values
Foot-pounds	Newton-meters
8 ft-lb	10.85 N·m
15 ft-lb	20.34 N·m
25 ft-lb	33.9 N·m
40 ft-lb	54.23 N·m
50 ft-lb	67.79 N·m
100 ft-lb	135.58 N·m
120 ft-lb	162.7 N·m
150 ft-lb	203.37 N·m
200 ft-lb	271.16 N·m
400 ft-lb	542.33 N·m

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FAQ

How many Nm is 1 ft-lb?

Exactly 1.3558179483314004 N·m; for mental math, 1 ft-lb ≈ 1.356 N·m. Formula: N·m = ft-lb × 1.3558179483314004.

Why is the factor exactly 1.3558179483314004?

A foot-pound of torque is one pound-force acting on a one-foot lever: 1 ft-lb = 1 lbf × 1 ft. The pound-force is exactly 4.4482216152605 N and the foot is exactly 0.3048 m, so their product, 1.3558179483314004 N·m, has no rounding in it.

Is a foot-pound of torque the same as a foot-pound of energy?

The number is the same, the meaning is not. Torque is force times lever arm (strictly a pound-foot, written ft-lb on most wrenches); work and energy are force times distance (a foot-pound, in joules in SI). This page converts torque.

How many inch-pounds and kgf·m are in a ft-lb?

1 ft-lb = 12 in-lb exactly, because a foot is 12 inches. In kilogram-force meters 1 ft-lb is about 0.1383 kgf·m, since 1 kgf·m = 9.80665 N·m.

Foot-Pounds to Newton-Meters