Kilojoules to Kilowatt Hours: 1 kJ equals 0.000278 kWh. To convert kilojoules to kilowatt hours, multiply by 0.000278 (kWh = kJ × 2.7778e-4). For example, 10 kJ = 0.002778 kWh.
How to Convert Kilojoules to Kilowatt Hours
To convert from kilojoules to kilowatt hours, multiply the value by 0.000278. The conversion is linear, meaning doubling the input doubles the output.
Conversion Formula
- Kilojoules to Kilowatt Hours:
kWh = kJ × 2.7778e-4 - Kilowatt Hours to Kilojoules:
kJ = kWh ÷ 2.7778e-4
Kilojoules to Kilowatt Hours Conversion Chart
| Kilojoules (kJ) | Kilowatt Hours (kWh) |
|---|---|
| 0.1 | 2.77778e-5 |
| 0.25 | 6.94444e-5 |
| 0.5 | 0.000139 |
| 1 | 0.000278 |
| 2 | 0.000556 |
| 3 | 0.000833 |
| 5 | 0.001389 |
| 10 | 0.002778 |
| 20 | 0.005556 |
| 25 | 0.006944 |
| 50 | 0.013889 |
| 100 | 0.027778 |
| 250 | 0.069444 |
| 1000 | 0.277778 |
Understanding the Units
What is a Kilojoule?
A kilojoule equals 1,000 joules.
Common contexts: nutrition labeling (outside US), mechanical engineering.
What is a Kilowatt Hour?
A kilowatt-hour equals exactly 3,600,000 joules — the energy delivered by 1 kW of power over one hour. It is the standard unit on electric utility bills.
Common contexts: electricity billing, home energy, EV battery capacity.
Real-World Reference Points
| Item | Kilojoules (kJ) | Kilowatt Hours (kWh) |
|---|---|---|
| Running a 100 W bulb for 10 h | 3600 | 1 |
| EV (Tesla Model 3 LR battery) | 269999.9978 | 75 |
| US household monthly average | 3214799.9743 | 893 |