Kilowatt Hours to Kilojoules: 1 kWh equals 3600 kJ. To convert kilowatt hours to kilojoules, multiply by 3600 (kJ = kWh × 3,600). For example, 10 kWh = 36000 kJ.
How to Convert Kilowatt Hours to Kilojoules
To convert from kilowatt hours to kilojoules, multiply the value by 3600. The conversion is linear, meaning doubling the input doubles the output.
Conversion Formula
- Kilowatt Hours to Kilojoules:
kJ = kWh × 3,600 - Kilojoules to Kilowatt Hours:
kWh = kJ ÷ 3,600
Kilowatt Hours to Kilojoules Conversion Chart
| Kilowatt Hours (kWh) | Kilojoules (kJ) |
|---|---|
| 0.1 | 360 |
| 0.25 | 900 |
| 0.5 | 1800 |
| 1 | 3600 |
| 2 | 7200 |
| 3 | 10800 |
| 5 | 18000 |
| 10 | 36000 |
| 20 | 72000 |
| 25 | 90000 |
| 50 | 180000 |
| 100 | 360000 |
| 250 | 900000 |
| 1000 | 3600000 |
Understanding the Units
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.
What is a Kilojoule?
A kilojoule equals 1,000 joules.
Common contexts: nutrition labeling (outside US), mechanical engineering.
Real-World Reference Points
| Item | Kilowatt Hours (kWh) | Kilojoules (kJ) |
|---|---|---|
| Running a 100 W bulb for 10 h | 1 | 3600 |
| EV (Tesla Model 3 LR battery) | 75 | 270000 |
| US household monthly average | 893 | 3214800 |