---
title: "Watt-hours to Joules — Wh to J converter"
description: "1 watt-hour = 3,600 joules. Convert watt-hours to joules with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/watt-hours-to-joules/
site: "At One Place"
---

# Watt-hours to joules

**1 watt-hour in joules: 1 Wh = 3,600 J**

J = Wh × 3,600

To convert watt-hours to joules, multiply by 3,600. The table below gives the values people look up most often, and the converter works for any number.

## Watt-hours to joules table

*Common watt-hour values converted to joules.*

| Watt-hours | Joules |
| --- | --- |
| 1 Wh | 3,600 |
| 2 Wh | 7,200 |
| 3 Wh | 10,800 |
| 4 Wh | 14,400 |
| 5 Wh | 18,000 |
| 10 Wh | 36,000 |
| 15 Wh | 54,000 |
| 20 Wh | 72,000 |
| 25 Wh | 90,000 |
| 30 Wh | 108,000 |
| 40 Wh | 144,000 |
| 50 Wh | 180,000 |
| 75 Wh | 270,000 |
| 100 Wh | 360,000 |
| 250 Wh | 900,000 |
| 500 Wh | 1,800,000 |
| 1,000 Wh | 3,600,000 |

## How the conversion works

The relationship is J = Wh × 3,600. Both units measure energy, so the conversion is a fixed factor that never changes.

## Common questions

### How many joules are in one watt-hour?

One watt-hour equals 3,600 joules. J = Wh × 3,600.

### How do you convert watt-hours to joules?

Use J = Wh × 3,600. So 10 Wh is 36,000 J.

### How many watt-hours are in one joule?

One joule equals 0.0002778 watt-hours, which is the reverse of the conversion above.

## Related pages

- [Joules to Watt-hours](https://atoneplace.net/convert/joules-to-watt-hours/)
- [Watt-hours to Kilojoules](https://atoneplace.net/convert/watt-hours-to-kilojoules/)
- [Watt-hours to Kilocalories](https://atoneplace.net/convert/watt-hours-to-kcal/)
- [Watt-hours to Kilowatt-hours](https://atoneplace.net/convert/watt-hours-to-kwh/)
- [Watt-hours to British thermal units](https://atoneplace.net/convert/watt-hours-to-btu/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)