---
title: "British thermal units to Watt-hours — BTU to Wh converter"
description: "1 British thermal unit = 0.29307 watt-hours. Conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/btu-to-watt-hours/
site: "At One Place"
---

# British thermal units to watt-hours

**1 British thermal unit in watt-hours: 1 BTU = 0.29307 Wh**

Wh = BTU × 0.2930710702

To convert British thermal units to watt-hours, multiply by 0.2930710702. The table below gives the values people look up most often, and the converter works for any number.

## British thermal units to watt-hours table

*Common British thermal unit values converted to watt-hours.*

| British thermal units | Watt-hours |
| --- | --- |
| 1 BTU | 0.29307 |
| 2 BTU | 0.58614 |
| 3 BTU | 0.87921 |
| 4 BTU | 1.172284 |
| 5 BTU | 1.465355 |
| 10 BTU | 2.930711 |
| 15 BTU | 4.396066 |
| 20 BTU | 5.861421 |
| 25 BTU | 7.326777 |
| 30 BTU | 8.792132 |
| 40 BTU | 11.72284 |
| 50 BTU | 14.65355 |
| 75 BTU | 21.98033 |
| 100 BTU | 29.30711 |
| 250 BTU | 73.26777 |
| 500 BTU | 146.5355 |
| 1,000 BTU | 293.0711 |

## How the conversion works

The relationship is Wh = BTU × 0.2930710702. Both units measure energy, so the conversion is a fixed factor that never changes.

## Common questions

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

One British thermal unit equals 0.29307 watt-hours. Wh = BTU × 0.2930710702.

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

Use Wh = BTU × 0.2930710702. So 10 BTU is 2.930711 Wh.

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

One watt-hour equals 3.412142 British thermal units, which is the reverse of the conversion above.

## Related pages

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