---
title: "Joules to Kilowatt-hours — J to kWh converter"
description: "1 joule = 2.778 × 10^-7 kilowatt-hours. Convert joules to kilowatt-hours with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/joules-to-kwh/
site: "At One Place"
---

# Joules to kilowatt-hours

**1 joule in kilowatt-hours: 1 J = 2.778 × 10^-7 kWh**

kWh = J × 2.777777778 × 10^-7

To convert joules to kilowatt-hours, multiply by 2.777777778 × 10^-7. The table below gives the values people look up most often, and the converter works for any number.

## Joules to kilowatt-hours table

*Common joule values converted to kilowatt-hours.*

| Joules | Kilowatt-hours |
| --- | --- |
| 1 J | 2.778 × 10^-7 |
| 2 J | 5.556 × 10^-7 |
| 3 J | 8.333 × 10^-7 |
| 4 J | 0.000001111 |
| 5 J | 0.000001389 |
| 10 J | 0.000002778 |
| 15 J | 0.000004167 |
| 20 J | 0.000005556 |
| 25 J | 0.000006944 |
| 30 J | 0.000008333 |
| 40 J | 0.00001111 |
| 50 J | 0.00001389 |
| 75 J | 0.00002083 |
| 100 J | 0.00002778 |
| 250 J | 0.00006944 |
| 500 J | 0.0001389 |
| 1,000 J | 0.0002778 |

## How the conversion works

The relationship is kWh = J × 2.777777778 × 10^-7. Both units measure energy, so the conversion is a fixed factor that never changes.

## Common questions

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

One joule equals 2.778 × 10^-7 kilowatt-hours. kWh = J × 2.777777778 × 10^-7.

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

Use kWh = J × 2.777777778 × 10^-7. So 10 J is 0.000002778 kWh.

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

One kilowatt-hour equals 3,600,000 joules, which is the reverse of the conversion above.

## Related pages

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