Quick answer: 1 Kilojoule in Kilowatt-hour (kWh)
1 kJ equals 0.000277778 kWh. To convert Kilojoule to Kilowatt-hour (kWh), multiply by 0.000277778 using the free calculator above — no signup needed.
Energy & Work units
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About Energy & Work Converter
The Energy & Work Converter converts between 7 different units, including Joule, Kilojoule, Calorie, Kilocalorie (kcal), Watt-hour (Wh). The base unit is the Joule, and every other unit on this page is defined as an exact multiple of it. Type any value into the calculator above to convert instantly — free, unlimited, no signup and nothing to install.
Common equivalents: 1 Joule = 0.001 Kilojoule, 0.239006 Calorie, 0.000239006 Kilocalorie (kcal).
Scale of this category: the smallest unit is the Joule (J) and the largest is the Kilowatt-hour (kWh) (kWh).
Last updated: 2026-09-15
Energy & Work conversion factors
| Unit | Symbol | Value in Joule |
|---|---|---|
| Joule | J | 1 J = 1 J |
| Kilojoule | kJ | 1 kJ = 1000 J |
| Calorie | cal | 1 cal = 4.184 J |
| Kilocalorie (kcal) | kcal | 1 kcal = 4184 J |
| Watt-hour (Wh) | Wh | 1 Wh = 3600 J |
| Kilowatt-hour (kWh) | kWh | 1 kWh = 3600000 J |
| BTU | BTU | 1 BTU = 1055.06 J |
Worked Examples
See exactly how the conversion works with real numbers, step by step.
How much is 1 Kilojoule in Kilowatt-hour (kWh)?
- Multiply 1 by the conversion factor 0.000277778
- 1 Kilojoule = 0.000277778 Kilowatt-hour (kWh)
How much is 100 Kilojoule in Kilowatt-hour (kWh)?
- Multiply 100 by the conversion factor 0.000277778
- 100 Kilojoule = 0.0277778 Kilowatt-hour (kWh)
How much is 1000 Kilojoule in Kilowatt-hour (kWh)?
- Multiply 1000 by the conversion factor 0.000277778
- 1000 Kilojoule = 0.277778 Kilowatt-hour (kWh)
Quick Conversion Reference Table
| Kilojoule (kJ) | Kilowatt-hour (kWh) (kWh) |
|---|---|
| 1 kJ (Kilojoule) | 0.000277778 kWh (Kilowatt-hour (kWh)) |
| 2 kJ (Kilojoule) | 0.000555556 kWh (Kilowatt-hour (kWh)) |
| 5 kJ (Kilojoule) | 0.00138889 kWh (Kilowatt-hour (kWh)) |
| 10 kJ (Kilojoule) | 0.00277778 kWh (Kilowatt-hour (kWh)) |
| 20 kJ (Kilojoule) | 0.00555556 kWh (Kilowatt-hour (kWh)) |
| 50 kJ (Kilojoule) | 0.0138889 kWh (Kilowatt-hour (kWh)) |
| 100 kJ (Kilojoule) | 0.0277778 kWh (Kilowatt-hour (kWh)) |
| 500 kJ (Kilojoule) | 0.138889 kWh (Kilowatt-hour (kWh)) |
| 1000 kJ (Kilojoule) | 0.277778 kWh (Kilowatt-hour (kWh)) |
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FAQ
How much is 1 Kilojoule in Kilowatt-hour (kWh)?
1 Kilojoule = 0.000277778 Kilowatt-hour (kWh).
How do I convert Kilojoule to Kilowatt-hour (kWh)?
Enter your value in Kilojoule into the converter above and the result in Kilowatt-hour (kWh) appears instantly. 1 kJ equals 0.000277778 kWh — just multiply your value by 0.000277778.
What is the formula for Kilojoule to Kilowatt-hour (kWh)?
The formula is: value in Kilowatt-hour (kWh) = value in Kilojoule × 0.000277778. For example, 100 kJ × 0.000277778 = 0.0277778 kWh.
Is this Kilojoule to Kilowatt-hour (kWh) converter free and accurate?
Yes. This Kilojoule to Kilowatt-hour (kWh) converter is 100% free, uses the exact international conversion factor (0.000277778), and works on any device with no signup.
How do I convert Kilowatt-hour (kWh) back to Kilojoule?
To convert back, divide by 0.000277778 (or multiply by 3600). You can also use our dedicated How Many Kilojoule in 1 Kilowatt-hour (kWh)? page for instant results.
Do I need to download an app or sign up?
No. The converter runs entirely in your browser — nothing to install, no account, no fees. It even keeps working offline once the page has loaded.
Which Energy & Work units are supported?
This converter supports 7 units: Joule, Kilojoule, Calorie, Kilocalorie (kcal), Watt-hour (Wh), Kilowatt-hour (kWh), BTU.