How to Convert Kilowatt-hours to Kilocalories (kWh to kcal)
Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU. This guide shows how to convert kilowatt-hours into kilocalories by hand, with examples and a quick-reference table.
The conversion
To convert kilowatt-hours to kilocalories, multiply the value by 860.4206500956. To go the other way, divide by the same number (or multiply by 0.0011622222). For a quick estimate, multiply by about 860.
Kilocalories = kilowatt-hours × 860.4206500956
Worked examples
- 3 kWh = 2,581.26 kcal
- 12.5 kWh = 10,755.26 kcal
- 75 kWh = 64,531.55 kcal
Kilowatt-hours to Kilocalories table
| Kilowatt-hours | Kilocalories |
|---|---|
| 1 kWh | 860.4207 kcal |
| 2 kWh | 1,720.84 kcal |
| 5 kWh | 4,302.1 kcal |
| 10 kWh | 8,604.21 kcal |
| 20 kWh | 17,208.41 kcal |
| 25 kWh | 21,510.52 kcal |
| 50 kWh | 43,021.03 kcal |
| 100 kWh | 86,042.07 kcal |
| 250 kWh | 215,105.16 kcal |
| 500 kWh | 430,210.33 kcal |
| 1,000 kWh | 860,420.65 kcal |
Common questions
Is kWh to kcal exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Kilocalories to Kilowatt-hours converter.
Mistakes to avoid
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
Background
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
For any value, use the Kilowatt-hours to Kilocalories Converter or browse all energy converters.
Run your own numbers: Kilowatt-hours to Kilocalories Converter