Quick answer: 1 Joule in Kilowatt-hour (kWh)
1 J equals 0.0000002777777777777778 kWh. To convert Joule to Kilowatt-hour (kWh), multiply by 0.0000002777777777777778 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 Joule in Kilowatt-hour (kWh)?
- Multiply 1 by the conversion factor 0.0000002777777777777778
- 1 Joule = 0.0000002777777777777778 Kilowatt-hour (kWh)
How much is 100 Joule in Kilowatt-hour (kWh)?
- Multiply 100 by the conversion factor 0.0000002777777777777778
- 100 Joule = 0.0000277778 Kilowatt-hour (kWh)
How much is 1000 Joule in Kilowatt-hour (kWh)?
- Multiply 1000 by the conversion factor 0.0000002777777777777778
- 1000 Joule = 0.000277778 Kilowatt-hour (kWh)
Quick Conversion Reference Table
| Joule (J) | Kilowatt-hour (kWh) (kWh) |
|---|---|
| 1 J (Joule) | 0.0000002777777777777778 kWh (Kilowatt-hour (kWh)) |
| 2 J (Joule) | 0.0000005555555555555555 kWh (Kilowatt-hour (kWh)) |
| 5 J (Joule) | 0.00000138889 kWh (Kilowatt-hour (kWh)) |
| 10 J (Joule) | 0.00000277778 kWh (Kilowatt-hour (kWh)) |
| 20 J (Joule) | 0.00000555556 kWh (Kilowatt-hour (kWh)) |
| 50 J (Joule) | 0.0000138889 kWh (Kilowatt-hour (kWh)) |
| 100 J (Joule) | 0.0000277778 kWh (Kilowatt-hour (kWh)) |
| 500 J (Joule) | 0.000138889 kWh (Kilowatt-hour (kWh)) |
| 1000 J (Joule) | 0.000277778 kWh (Kilowatt-hour (kWh)) |
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FAQ
How much is 1 Joule in Kilowatt-hour (kWh)?
1 Joule = 0.0000002777777777777778 Kilowatt-hour (kWh).
How do I convert Joule to Kilowatt-hour (kWh)?
Enter your value in Joule into the converter above and the result in Kilowatt-hour (kWh) appears instantly. 1 J equals 0.0000002777777777777778 kWh — just multiply your value by 0.0000002777777777777778.
What is the formula for Joule to Kilowatt-hour (kWh)?
The formula is: value in Kilowatt-hour (kWh) = value in Joule × 0.0000002777777777777778. For example, 100 J × 0.0000002777777777777778 = 0.0000277778 kWh.
Is this Joule to Kilowatt-hour (kWh) converter free and accurate?
Yes. This Joule to Kilowatt-hour (kWh) converter is 100% free, uses the exact international conversion factor (0.0000002777777777777778), and works on any device with no signup.
How do I convert Kilowatt-hour (kWh) back to Joule?
To convert back, divide by 0.0000002777777777777778 (or multiply by 3600000). You can also use our dedicated How Many Joule 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.