---
title: "Electronvolts to Watt-hours — eV to Wh converter"
description: "1 electronvolt = 4.45 × 10^-23 watt-hours. Convert electronvolts to watt-hours with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/electronvolts-to-watt-hours/
site: "At One Place"
---

# Electronvolts to watt-hours

**1 electronvolt in watt-hours: 1 eV = 4.45 × 10^-23 Wh**

Wh = eV × 4.45049065 × 10^-23

To convert electronvolts to watt-hours, multiply by 4.45049065 × 10^-23. The table below gives the values people look up most often, and the converter works for any number.

## Electronvolts to watt-hours table

*Common electronvolt values converted to watt-hours.*

| Electronvolts | Watt-hours |
| --- | --- |
| 1 eV | 4.45 × 10^-23 |
| 2 eV | 8.901 × 10^-23 |
| 3 eV | 1.335 × 10^-22 |
| 4 eV | 1.78 × 10^-22 |
| 5 eV | 2.225 × 10^-22 |
| 10 eV | 4.45 × 10^-22 |
| 15 eV | 6.676 × 10^-22 |
| 20 eV | 8.901 × 10^-22 |
| 25 eV | 1.113 × 10^-21 |
| 30 eV | 1.335 × 10^-21 |
| 40 eV | 1.78 × 10^-21 |
| 50 eV | 2.225 × 10^-21 |
| 75 eV | 3.338 × 10^-21 |
| 100 eV | 4.45 × 10^-21 |
| 250 eV | 1.113 × 10^-20 |
| 500 eV | 2.225 × 10^-20 |
| 1,000 eV | 4.45 × 10^-20 |

## How the conversion works

The relationship is Wh = eV × 4.45049065 × 10^-23. Both units measure energy, so the conversion is a fixed factor that never changes.

## Common questions

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

One electronvolt equals 4.45 × 10^-23 watt-hours. Wh = eV × 4.45049065 × 10^-23.

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

Use Wh = eV × 4.45049065 × 10^-23. So 10 eV is 4.45 × 10^-22 Wh.

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

One watt-hour equals 2.2469433 × 10^22 electronvolts, which is the reverse of the conversion above.

## Related pages

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