---
title: "Kilowatt-hours to Joules — kWh to J converter"
description: "1 kilowatt-hour = 3,600,000 joules. Convert kilowatt-hours to joules with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/kwh-to-joules/
site: "At One Place"
---

# Kilowatt-hours to joules

**1 kilowatt-hour in joules: 1 kWh = 3,600,000 J**

J = kWh × 3,600,000

To convert kilowatt-hours to joules, multiply by 3,600,000. The table below gives the values people look up most often, and the converter works for any number.

## Kilowatt-hours to joules table

*Common kilowatt-hour values converted to joules.*

| Kilowatt-hours | Joules |
| --- | --- |
| 1 kWh | 3,600,000 |
| 2 kWh | 7,200,000 |
| 3 kWh | 10,800,000 |
| 4 kWh | 14,400,000 |
| 5 kWh | 18,000,000 |
| 10 kWh | 36,000,000 |
| 15 kWh | 54,000,000 |
| 20 kWh | 72,000,000 |
| 25 kWh | 90,000,000 |
| 30 kWh | 108,000,000 |
| 40 kWh | 144,000,000 |
| 50 kWh | 180,000,000 |
| 75 kWh | 270,000,000 |
| 100 kWh | 360,000,000 |
| 250 kWh | 900,000,000 |
| 500 kWh | 1,800,000,000 |
| 1,000 kWh | 3,600,000,000 |

## How the conversion works

The relationship is J = kWh × 3,600,000. Both units measure energy, so the conversion is a fixed factor that never changes.

## Common questions

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

One kilowatt-hour equals 3,600,000 joules. J = kWh × 3,600,000.

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

Use J = kWh × 3,600,000. So 10 kWh is 36,000,000 J.

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

One joule equals 2.778 × 10^-7 kilowatt-hours, which is the reverse of the conversion above.

## Related pages

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