Conversion table
| Newton-metres (Nm) | Joules (J) |
|---|---|
| 1 Nm | 1 |
| 10 Nm | 10 |
| 25 Nm | 25 |
| 50 Nm | 50 |
| 100 Nm | 100 |
| 250 Nm | 250 |
| 500 Nm | 500 |
| 1000 Nm | 1000 |
How to convert Nm to J
- Nm
- newton-metres you enter
- J
- the numerically equal joules
- N·m
- one newton acting over one metre, both units share this
The equality is real but easy to abuse. Energy and torque both reduce to newton times metre, so the arithmetic matches, but you cannot swap a torque spec for an energy figure or vice versa. By convention torque is written in newton-metres and energy in joules to keep them apart on the page.
If you are converting a torque spec between systems you want newton-metres to foot-pounds, not this. This page is only for the Nm and J numeric identity.
Frequently asked questions
Is a newton-metre the same as a joule?
Numerically yes, one for one, but they describe different quantities: a joule is energy, a newton-metre is usually torque.
How many joules is 100 Nm?
As a number, 100 Nm is 100 J. Whether that is meaningful depends on whether you mean energy or torque.
Why do torque and energy share a unit?
Both are a force times a distance, so both reduce to newton times metre. The distinction is direction: energy is along the force, torque is perpendicular to it.
Can I convert a torque value into joules of energy?
Not directly. The numbers line up, but a twisting effort is not the same physical thing as stored or spent energy.
Which unit should I write torque in?
Newton-metres, and reserve joules for energy. Keeping the labels apart avoids exactly this confusion.