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Free online torque converter

Torque is a rotational force that causes an object to spin around an axis. This converter handles 8 torque units used in automotive engineering, mechanics, and physics.

About this calculator

How to use

  1. Enter the torque value.
  2. Select the unit you are converting from.
  3. Select the unit you are converting to.
  4. The result and full conversion table appear instantly.
  5. Click “Share with my numbers” to copy a URL with your inputs.

Conversion factors (relative to N·m)

UnitN·m equivalent
Newton-meter (N·m)1
Newton-centimeter (N·cm)0.01
Kilonewton-meter (kN·m)1 000
Pound-force foot (lbf·ft)1.35582
Pound-force inch (lbf·in)0.112985
Kilogram-force meter (kgf·m)9.80665
Kilogram-force centimeter (kgf·cm)0.0980665
Ounce-force inch (ozf·in)0.00706155

Worked example

A car engine spec lists 200 lbf·ft of peak torque.

Converting to N·m: 200 × 1.35582 = 271.2 N·m

Converting to kgf·m: 271.2 ÷ 9.80665 ≈ 27.7 kgf·m

Notes

  • Torque (N·m) and energy (joules, also N·m) have the same dimensions but different physical meanings — they are not interchangeable.
  • lbf·ft is also written as ft·lbf or ft-lb in US engineering.
  • Conversion factors follow NIST Guide to the SI (2008), Appendix B.

Frequently asked

How does the torque converter work?
Every unit is first converted to the base unit (Newton-meter) by multiplying by a fixed factor, then divided by the target unit's factor to get the result.
What is the difference between lbf·ft and lbf·in?
Pound-force foot (lbf·ft) is 12 times larger than pound-force inch (lbf·in). Engine torque specs use lbf·ft while small fastener specs often use lbf·in.
What is a Newton-meter?
A Newton-meter (N·m) is the SI unit of torque. It equals the torque produced by a force of 1 Newton acting at a distance of 1 meter from the pivot point.
How do I convert lbf·ft to N·m?
Multiply the lbf·ft value by 1.35582 to get Newton-meters. For example, 100 lbf·ft = 135.582 N·m.
What units are supported?
Newton-meter (N·m), Newton-centimeter (N·cm), kilonewton-meter (kN·m), pound-force foot (lbf·ft), pound-force inch (lbf·in), kilogram-force meter (kgf·m), kilogram-force centimeter (kgf·cm), and ounce-force inch (ozf·in).