# Inch-Pounds to Nm Converter

URL: https://speedycalculator.com/calculators/conversion/inch-lbs-to-nm/
Last updated: 2026-10-25

> Convert pound-inches (lbf·in) to newton-metres (N·m): 1 pound-inch = 0.11298483 N·m, so multiply by 0.11298483 or divide by 8.8507458. Both fields are editable, so you can also type in newton-metres and get pound-inches back.

## Inputs

- Pound-inches (lbf·in)

## Results

- Newton-metres

## Formula

```
1 lbf·in = 0.11298483 N·m
1 N·m = 8.8507458 lbf·in
N·m = lbf·in × 0.11298483
```

## Explanation

Small fasteners, bicycle components and electrical terminals are torqued in inch-pounds in U.S. manuals and in newton-metres elsewhere. One inch-pound is about 0.113 N·m.

### How to use the Inch-Pounds to Nm Converter

- Type the number of pound-inches into the **Pound-inches** field. Decimals such as 50 are fine.
- Read the answer in **Newton-metres** – it updates as you type, with no button to press.
- To convert the other way, type into **Newton-metres** and the pound-inches are recalculated.
- Press **Copy results** to copy both values with the page title, or **Copy link** to share this exact conversion.

This page converts only lbf·in ⇄ N·m. Need a different unit? Use the general torque converter, where you can choose any “from” and “to” unit.

### How it works

Both units measure torque, so they are always in the same ratio: one pound-inch equals 0.11298483 newton-metres. The calculator multiplies the number of pound-inches you type by 0.11298483 to give newton-metres, and when you type into the newton-metres field it divides by the same factor to give pound-inches. Because the ratio never changes, doubling the pound-inches always doubles the newton-metres. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).

### How to convert pound-inches to newton-metres

- Write down the value in pound-inches, for example **100 lbf·in**.
- Multiply by the conversion factor 0.11298483 (because 1 pound-inch = 0.11298483 N·m).
- 100 × 0.11298483 = **11.298483 N·m**.
- To go back from newton-metres to pound-inches, divide by 0.11298483 – or multiply by 8.8507458.

### lbf·in to N·m conversion table

Pound-inchesNewton-metresNewton-metresPound-inches10 lbf·in1.1298483 N·m1 N·m8.8507458 lbf·in20 lbf·in2.2596966 N·m2 N·m17.701492 lbf·in25 lbf·in2.8246207 N·m5 N·m44.253729 lbf·in35 lbf·in3.954469 N·m10 N·m88.507458 lbf·in50 lbf·in5.6492415 N·m20 N·m177.01492 lbf·in75 lbf·in8.4738622 N·m50 N·m442.53729 lbf·in100 lbf·in11.298483 N·m100 N·m885.07458 lbf·in150 lbf·in16.947724 N·m1,000 N·m8,850.7458 lbf·in200 lbf·in22.596966 N·m

### What is a pound-inch?

The pound-inch (in-lb) is 1/12 of a pound-foot, about 0.113 N·m, used for small fasteners and electrical terminals.

### What is a newton-metre?

The newton-metre is the SI unit of torque: a force of one newton at a lever arm of one metre. Car and bicycle torque specifications use N·m.

### Quick mental conversion

For a fast estimate, multiply pound-inches by about **0.11** to get newton-metres; the error is about 2.6%. Use the calculator above when you need the exact figure.

### Common mistakes to avoid

Confusing ft-lb with in-lb (a factor of 12), and treating torque in n·m as energy in joules.

## Worked example

Inputs — Pound-inches: 100 lbf·in.

Results — **Newton-metres = 11.2984829 N·m**.

## FAQ

**How many N·m is 100 in-lb?**
About 11.3 N·m.

**How many in-lb in a N·m?**
About 8.85.

**How many newton-metres are in one pound-inch?**
1 lbf·in = 0.11298483 N·m.

**How many pound-inches are in one newton-metre?**
1 N·m = 8.8507458 lbf·in.

**How do I convert pound-inches to newton-metres?**
Multiply the number of pound-inches by 0.11298483. For example, 100 lbf·in × 0.11298483 = 11.298483 N·m.

**How do I convert newton-metres back to pound-inches?**
Divide by 0.11298483 (or multiply by 8.8507458), or simply type the value into the newton-metres field above.

**What is 10 lbf·in in newton-metres?**
10 lbf·in = 1.1298483 N·m.

**What is 50 lbf·in in newton-metres?**
50 lbf·in = 5.6492415 N·m.

**Is this conversion exact?**
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.

**Can I convert to other units on this page?**
This page converts only between pound-inches and newton-metres. To pick any torque unit, use the general torque converter linked under Related calculators.

**What formula does the Inch-Pounds to Nm Converter use?**
1 lbf·in = 0.11298483 N·m.


## Sources

- [NIST Special Publication 811 – Guide for the Use of the International System of Units](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44 Appendix C – General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)