# 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.

Convert between 8 torque units including Newton-meter, pound-force foot, kilogram-force meter, and more. Enter a value, choose units, and get the full conversion table instantly.

**Interactive version:** https://onlinecalculator.me/unit-converters/torque/
**Category:** Unit Converters

## 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)

| Unit | N·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 questions

### 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).

## Sources

- [Torque — definition and units](https://en.wikipedia.org/wiki/Torque) — Wikipedia
- [Newton-metre — SI unit of torque and pound-foot conversion](https://en.wikipedia.org/wiki/Newton-metre) — Wikipedia
- [NIST Special Publication 811: Guide for the Use of the SI (conversion factors)](https://www.nist.gov/pml/special-publication-811) — National Institute of Standards and Technology

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