---
title: "Watt-hours to British thermal units — Wh to BTU converter"
description: "1 watt-hour = 3.412142 British thermal units. Conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/watt-hours-to-btu/
site: "At One Place"
---

# Watt-hours to British thermal units

**1 watt-hour in British thermal units: 1 Wh = 3.412142 BTU**

BTU = Wh × 3.412141633

To convert watt-hours to British thermal units, multiply by 3.412141633. The table below gives the values people look up most often, and the converter works for any number.

## Watt-hours to British thermal units table

*Common watt-hour values converted to British thermal units.*

| Watt-hours | British thermal units |
| --- | --- |
| 1 Wh | 3.412142 |
| 2 Wh | 6.824283 |
| 3 Wh | 10.23642 |
| 4 Wh | 13.64857 |
| 5 Wh | 17.06071 |
| 10 Wh | 34.12142 |
| 15 Wh | 51.18212 |
| 20 Wh | 68.24283 |
| 25 Wh | 85.30354 |
| 30 Wh | 102.3642 |
| 40 Wh | 136.4857 |
| 50 Wh | 170.6071 |
| 75 Wh | 255.9106 |
| 100 Wh | 341.2142 |
| 250 Wh | 853.0354 |
| 500 Wh | 1,706.0708 |
| 1,000 Wh | 3,412.1416 |

## How the conversion works

The relationship is BTU = Wh × 3.412141633. Both units measure energy, so the conversion is a fixed factor that never changes.

## Common questions

### How many British thermal units are in one watt-hour?

One watt-hour equals 3.412142 British thermal units. BTU = Wh × 3.412141633.

### How do you convert watt-hours to British thermal units?

Use BTU = Wh × 3.412141633. So 10 Wh is 34.12142 BTU.

### How many watt-hours are in one British thermal unit?

One British thermal unit equals 0.29307 watt-hours, which is the reverse of the conversion above.

## Related pages

- [British thermal units to Watt-hours](https://atoneplace.net/convert/btu-to-watt-hours/)
- [Watt-hours to Joules](https://atoneplace.net/convert/watt-hours-to-joules/)
- [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/)

## 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/)