Reference table

Torque: N·m, lb·ft and kgf·m

Workshop manuals and datasheets switch between newton metres, pound-feet and kilogram-force metres. This table shows the same torques in all three notations.

Torque: N·m, lb·ft and kgf·m
N·mlb·ftlb·inkgf·m
10.73756215 lb·ft8.85074579 lb·in0.10197162 kgf·m
53.68781075 lb·ft44.25372896 lb·in0.50985811 kgf·m
107.37562149 lb·ft88.50745791 lb·in1.01971621 kgf·m
2014.75124299 lb·ft177.01491583 lb·in2.03943243 kgf·m
2518.43905373 lb·ft221.26864478 lb·in2.54929053 kgf·m
5036.87810746 lb·ft442.53728957 lb·in5.09858106 kgf·m
8059.00497194 lb·ft708.05966331 lb·in8.1577297 kgf·m
10073.75621493 lb·ft885.07457913 lb·in10.19716213 kgf·m
150110.63432239 lb·ft1,327.6118687 lb·in15.29574319 kgf·m
200147.51242986 lb·ft1,770.14915827 lb·in20.39432426 kgf·m
300221.26864478 lb·ft2,655.2237374 lb·in30.59148639 kgf·m

Torque is force times lever arm, so every unit contains a length: lb·ft uses the pound as force and the foot as lever arm, kgf·m the kilogram as force and the metre. The conversion is a pure factor because both components are firmly defined. Tightening torques always belong to a specific bolt and joint.

Sources

BIPM SI BrochureSI base units, prefixes and official SI context.NIST Guide to SI Appendix BNIST conversion-factor method and non-SI factors.

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