Convert Ounce-inches to Kilogram-force Meters

Formula

kgf·m = ozf·in × 0.000720077887375

or kgf·m = ozf·in ÷ 1388.738659432

Derivation from SI units:

• 1 ozf·in = 1/16 lbf·in = 0.00706155181 N·m
• 1 kgf·m = 9.80665 N × 1 m = 9.80665 N·m (exact)
• 1 ozf·in = 0.007061551814226 N·m ÷ 9.80665 N·m per kgf·m = 0.000720077887375 kgf·m

Both units are defined exactly, so the factor is exact. Ounce-inch definition: ounce-inch; Kilogram-force Meter definition: kilogram-force meter.

Worked examples

1. A reading of 10 ozf·in converts to 0.007200778874 kgf·m.
   10 ozf·in × 0.0007200778874 = 0.007200778874 kgf·m
2. A value of 100 ozf·in is 0.07200778874 kgf·m.
   100 ozf·in × 0.0007200778874 = 0.07200778874 kgf·m

Where it's used

Ounce-inches are used for stepper and servo motor holding torque, while kilogram-force meters appear in older Japanese and European engine torque specs. Both measure torque (moment of force), so the conversion is a fixed factor.

Ounce-inch to other torque units

Frequently asked questions

Sources

• Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "ounce (avoirdupois)-force inch".
• Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "kilogram-force meter (kgf·m)".

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.