Torque Converter

History of Torque Measurement

Torque — twisting force — has been understood since Archimedes described leverage. It became a measured engineering quantity with the steam engine and the Prony brake in the 19th century. The newton metre is the SI unit; the foot-pound survives in North American engine ratings and fastener specifications, and the inch-pound covers the small end of the scale.

Why Accurate Torque Conversion Matters

Torque conversion prevents mechanical failure. A wheel nut that should be tightened to a foot-pound figure but is set in newton metres instead ends up under-tightened by about 26 %. Engine specs, bicycle components, and industrial fasteners mix N·m, ft·lb, and in·lb across manuals from different countries.

Who Uses Torque Conversions?

Mechanics, automotive engineers, cyclists, machinists, and anyone using a torque wrench.

Common Torque Conversion Confusions

Foot-pounds vs inch-pounds: 12 in·lb = 1 ft·lb, so reading one as the other over-tightens a small fastener twelve-fold. Torque is also not energy, even though the joule shares its dimensions — torque is a turning force, not work already done.

Torque Units Reference Table

Quick Torque Conversion Reference

Torque Conversion FAQ

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