---
title: "British thermal units to Electronvolts — BTU to eV converter"
description: "1 British thermal unit = 6.5851407 × 10^21 electronvolts. Conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/btu-to-electronvolts/
site: "At One Place"
---

# British thermal units to electronvolts

**1 British thermal unit in electronvolts: 1 BTU = 6.5851407 × 10^21 eV**

eV = BTU × 6.585140678 × 10^21

To convert British thermal units to electronvolts, multiply by 6.585140678 × 10^21. The table below gives the values people look up most often, and the converter works for any number.

## British thermal units to electronvolts table

*Common British thermal unit values converted to electronvolts.*

| British thermal units | Electronvolts |
| --- | --- |
| 1 BTU | 6.5851407 × 10^21 |
| 2 BTU | 1.3170281 × 10^22 |
| 3 BTU | 1.9755422 × 10^22 |
| 4 BTU | 2.6340563 × 10^22 |
| 5 BTU | 3.2925703 × 10^22 |
| 10 BTU | 6.5851407 × 10^22 |
| 15 BTU | 9.877711 × 10^22 |
| 20 BTU | 1.3170281 × 10^23 |
| 25 BTU | 1.6462852 × 10^23 |
| 30 BTU | 1.9755422 × 10^23 |
| 40 BTU | 2.6340563 × 10^23 |
| 50 BTU | 3.2925703 × 10^23 |
| 75 BTU | 4.9388555 × 10^23 |
| 100 BTU | 6.5851407 × 10^23 |
| 250 BTU | 1.6462852 × 10^24 |
| 500 BTU | 3.2925703 × 10^24 |
| 1,000 BTU | 6.5851407 × 10^24 |

## How the conversion works

The relationship is eV = BTU × 6.585140678 × 10^21. Both units measure energy, so the conversion is a fixed factor that never changes.

## Common questions

### How many electronvolts are in one British thermal unit?

One British thermal unit equals 6.5851407 × 10^21 electronvolts. eV = BTU × 6.585140678 × 10^21.

### How do you convert British thermal units to electronvolts?

Use eV = BTU × 6.585140678 × 10^21. So 10 BTU is 6.5851407 × 10^22 eV.

### How many British thermal units are in one electronvolt?

One electronvolt equals 1.519 × 10^-22 British thermal units, which is the reverse of the conversion above.

## Related pages

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