Convert a torque specification between N·m, lbf·ft, lbf·in, and other force-distance units. Both directions share this page, and the results show your amount in every supported unit.
How to use this calculator
Enter the torque, select its original unit, and choose the unit printed on your wrench or specification. For inch-pounds to foot-pounds, choose Pound-force inches as the source and Pound-force feet as the destination. The reference table is a unit comparison; the equivalent table uses your entered amount.
Inch-pounds, foot-pounds, and newton meters
A foot is exactly 12 inches, so a pound-force applied at one foot produces 12 times the torque of the same force applied at one inch. The pound in these torque labels means pound-force, not pound mass. The force conversion uses standard gravity and the international pound.
Torque and energy can both have the dimensions of force multiplied by distance, but they describe different quantities. Use N·m for torque and joules for energy. A unit conversion does not choose a tightening specification or account for lubrication, fastener condition, or wrench accuracy.
Examples
An inch-pound wrench
120 lbf·in ÷ 12 = 10 lbf·ft. Selecting the reverse units changes 10 lbf·ft back to 120 lbf·in.
A metric torque specification
100 N·m is approximately 73.75621493 lbf·ft. Keep the original specification and round only to a setting your tool can resolve.
Formula
target = source × source factor / target factor
1 lbf·ft = 12 lbf·in
1 lbf·ft = 1.3558179483314 N·m
Precision and interpretation
Signed inputs preserve direction under your chosen sign convention. The converter does not infer clockwise or counterclockwise direction. Display precision is selectable from 4 to 12 significant digits; more displayed digits do not improve the accuracy of a measured torque.
Definitions and further reading
Unit and quantity reference provides the underlying definitions. The examples above are worked calculations for this tool.