Kilowatt-hours to Joules Converter
Convert kilowatt-hours (kWh) to joules (J) instantly with our comprehensive calculator. Calculate energy conversions for electricity, physics, engineering, and scientific applications.
Step 1: Energy Input
About Kilowatt-hours
A kilowatt-hour (kWh) is a unit of energy equal to one kilowatt of power sustained for one hour. It’s commonly used for electricity billing and represents 3.6 million joules.
Step 2: Conversion Settings
Conversion Formula
1 kilowatt-hour (kWh) = 3.6 × 10⁶ joules (J) = 3.6 megajoules (MJ). The conversion factor comes from the definition of watt (1 J/s) and hour (3600 seconds).
Conversion Results
Energy in Joules
Energy Unit Comparison
| Energy Unit | Symbol | Equivalent in Joules | Equivalent in kWh |
|---|
Conversion Formula
1 kWh = 3.6 × 10⁶ J = 3,600,000 J
The conversion from kilowatt-hours to joules uses the formula: Joules = Kilowatt-hours × 3,600,000. This comes from 1 kW = 1000 W, 1 hour = 3600 seconds, and 1 W = 1 J/s.
Common Examples
| Application | Energy (kWh) | Equivalent in Joules | Real-world Comparison |
|---|---|---|---|
| 100W bulb for 10 hours | 1 kWh | 3.6 MJ | Lifting 1 kg mass 367 km high |
| Electric oven for 1 hour | 2 kWh | 7.2 MJ | Energy in 0.17 kg of gasoline |
| Average daily home electricity (US) | 30 kWh | 108 MJ | Energy to run a car for 1 hour |
| Electric vehicle battery (typical) | 60 kWh | 216 MJ | Energy in 5 kg of TNT |
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