Kilowatt-hours to Kilojoules Converter
Common Conversions
| kWh | kJ |
|---|---|
| 0.001 | 3.6 |
| 0.01 | 36 |
| 0.1 | 360 |
| 0.5 | 1800 |
| 1 | 3600 |
| 2 | 7200 |
| 5 | 18000 |
| 10 | 36000 |
| 50 | 180000 |
| 100 | 360000 |
| 1000 | 3600000 |
Why this conversion matters in chemistry
Take hVAC and process-energy balances. A 50,000 sq ft office building drawing 2000 kWh/day for cooling is 7.2 × 10⁶ kJ/day on the engineer's psychrometric energy balance — the form a chilled-water plant COP calculation expects. Industrial-process energy figures show similar. Producing one tonne of ammonia via the Haber process needs about 10,000 kWh, equivalently 3.6 × 10⁷ kJ, the energy bill that sets the economics. The constant of 3600 kJ per kWh is geometric, not empirical. In practice you reach for it when an electrical-energy total has to come out in the SI energy form thermodynamic calculations expect.
Formula
Worked Examples
The conversion anchor — exactly one kilowatt-hour in kJ.
About the energy budget for a small benchtop electrolysis.
The theoretical energy to make 1 kg of H₂ from water electrolysis.
About the hourly energy draw of a small benchtop instrument.