Kilogram-force metres to newton-metres (kgf·m to N·m)

1 kgf·m = 9.80665 N·m exactly. To convert kilogram-force metres to newton-metres, multiply by 9.80665.

The formula

N·m = kgf·m × 9.80665

Where the factor comes from — each unit by its definition, then its size in SI:

  • 1 kgf·m = kgf × m = 9.80665 N·m
  • 1 N·m is the SI unit of torque.

Dividing the two SI sizes gives the factor: 9.80665, exact — every step above is a definition, not a measurement. The reverse factor is 0.101971621298.

Torque is force times lever arm, in newton-metres. Workshop manuals mix N·m, lbf·ft and lbf·in; a torque wrench set in the wrong unit over- or under-tightens by a large factor.

Worked examples

  • A car wheel nut: 11.2169 kgf·m = 110 N·m — 11.2169 × 9.80665 = 110
  • A bolt spec in a US manual (30 lbf·ft): 4.14765 kgf·m = 40.6745 N·m — 4.14765 × 9.80665 = 40.6745
  • A bicycle stem bolt: 1.01972 kgf·m = 10 N·m — 1.01972 × 9.80665 = 10

Frequently asked questions

How many newton-metres is 1 kgf·m?

1 kgf·m = 9.80665 N·m, exactly, from the unit definitions.

How do I convert newton-metres back to kilogram-force metres?

Divide by 9.80665 — or multiply by 0.101971621298: 1 N·m = 0.101971621298 kgf·m.

kgf·m to N·m conversion table

Kilogram-force metres (kgf·m)Newton-metres (N·m)
19.80665
219.6133
329.41995
439.2266
549.03325
658.8399
768.64655
878.4532
988.25985
1098.0665
15147.09975
20196.133
25245.16625
30294.1995
40392.266
50490.3325
60588.399
70686.4655
75735.49875
80784.532
90882.5985
100980.665
1501,470.9975
2001,961.33
2502,451.6625
5004,903.325
1,0009,806.65

Definitions: NIST Special Publication 811 (2008), Guide for the Use of the International System of Units, Appendix B — https://www.nist.gov/pml/special-publication-811 · BIPM, The International System of Units (SI Brochure), 9th edition (2019), Tables 2, 4 and 8 — https://www.bipm.org/en/publications/si-brochure. Machine value of the factor: 9.80665.