Torque Converter

Convert torque units. Exact factors, a quick reference table and worked examples.

100 N·m = 73.75621 lbf·ft

The same value in every unit

UnitSymbolValue
Newton-millimeterN·mm100 000
Newton-meterN·m100
Kilonewton-meterkN·m0.1
Pound-force footlbf·ft73.75621
Pound-force inchlbf·in885.0746
Ounce-force inchozf·in14 161.19
Kilogram-force meterkgf·m10.19716
Kilogram-force centimeterkgf·cm1 019.716

How to convert torque units

Every torque unit is related to one base unit (Newton-meter, N·m) by an exact factor. To convert, multiply by the factor of the unit you start from and divide by the factor of the unit you want.

value in new unit = value × (factor of old unit ÷ factor of new unit)

For example, 1 N·m = 1 N·m and 1 lbf·ft = 1.355818 N·m, so 1 N·m = 0.7375621 lbf·ft.

Quick reference table

How many of the units in the column headings make up one of the unit in each row.

One…= N·mm= N·m= kN·m= lbf·ft= lbf·in= ozf·in
1 N·mm10.0011 × 10⁻⁶0.00073756210.0088507460.1416119
1 N·m1 00010.0010.73756218.850746141.6119
1 kN·m1 000 0001 0001737.56218 850.746141 611.9
1 lbf·ft1 355.8181.3558180.001355818112192
1 lbf·in112.98480.11298480.00011298480.08333333116
1 ozf·in7.0615520.0070615527.06155 × 10⁻⁶0.0052083330.06251
1 kgf·m9 806.659.806650.009806657.23301486.796171 388.739
1 kgf·cm98.06650.09806659.80665 × 10⁻⁵0.072330140.867961713.88739

Common values: N·m to lbf·ft

Newton-meter (N·m)Pound-force foot (lbf·ft)
1 N·m0.7375621 lbf·ft
2 N·m1.475124 lbf·ft
5 N·m3.687811 lbf·ft
10 N·m7.375621 lbf·ft
20 N·m14.75124 lbf·ft
50 N·m36.87811 lbf·ft
100 N·m73.75621 lbf·ft
200 N·m147.5124 lbf·ft
500 N·m368.7811 lbf·ft
1 000 N·m737.5621 lbf·ft

Worked examples

Convert 100 N·m to lbf·ft

  • 1 N·m = 1 N·m and 1 lbf·ft = 1.355818 N·m.
  • 100 × 1 ÷ 1.355818 = 73.75621 lbf·ft.

Convert 50 kN·m to N·mm

  • 1 kN·m = 1 000 N·m and 1 N·mm = 0.001 N·m.
  • 50 × 1 000 ÷ 0.001 = 50 000 000 N·mm.

Convert 250 kgf·cm to N·m

  • 1 kgf·cm = 0.0980665 N·m and 1 N·m = 1 N·m.
  • 250 × 0.0980665 ÷ 1 = 24.51663 N·m.

The units explained

UnitSymbolExact factorWhere it is used
Newton-millimeterN·mm1 N·mm = 0.001 N·mSmall motors
Newton-meterN·m1 N·m = 1 N·mSI unit; motors, fasteners
Kilonewton-meterkN·m1 kN·m = 1 000 N·mLarge shafts, structures
Pound-force footlbf·ft1 lbf·ft = 1.355818 N·mUS fasteners, engines
Pound-force inchlbf·in1 lbf·in = 0.1129848 N·mUS small fasteners
Ounce-force inchozf·in1 ozf·in = 0.007061552 N·mSmall US motors
Kilogram-force meterkgf·m1 kgf·m = 9.80665 N·mOlder specifications
Kilogram-force centimeterkgf·cm1 kgf·cm = 0.0980665 N·mSmall motors, servos

Key facts

  • T = F × r. Power P = T × ω, so T (N·m) = 9 550 × P (kW) ÷ n (rpm).
  • 1 lbf·ft = 1.3558 N·m. Fastener torque specifications are quoted in N·m or lbf·ft.

FAQ

How many Pound-force foot units are in one Newton-meter?

1 N·m = 0.7375621 lbf·ft.

How do I convert N·m to lbf·ft?

Multiply by 0.7375621 (the factor 1 ÷ 1.355818). To go back, divide by 0.7375621 or multiply by 1.355818.

What is the newton-millimeter (N·mm) used for?

Small motors.

What is the newton-meter (N·m) used for?

SI unit; motors, fasteners.

Are the conversion factors exact?

Where a unit is defined exactly (the inch is 25.4 mm, the pound is 0.45359237 kg, standard gravity is 9.80665 m/s²) the factor is exact; others are given to ten or more digits. Results are shown to seven significant digits.

References

  • NIST Special Publication 811, Guide for the Use of the International System of Units (SI), and NIST Handbook 44, Appendix C (general tables of units of measurement).
  • BIPM, The International System of Units (SI Brochure), 9th edition; ISO 80000 (quantities and units).

Last reviewed: November 2026.