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Energy
Kilowatt-hours to Calories
Convert kilowatt-hours (kWh) to calories (cal). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 kWh = 860420.65 cal
Kilowatt-hours to Calories Conversion Table
Common values, ready to copy:
| kilowatt-hours | calories |
|---|---|
| 1 kWh | 860420.65 cal |
| 2 kWh | 1.7208e+6 cal |
| 5 kWh | 4.3021e+6 cal |
| 10 kWh | 8.6042e+6 cal |
| 25 kWh | 2.1511e+7 cal |
| 50 kWh | 4.3021e+7 cal |
| 100 kWh | 8.6042e+7 cal |
| 1,000 kWh | 8.6042e+8 cal |
Formula
calories = kilowatt-hours × 8.60420650e+5
Energy uses the SI joule. Food calories (kcal) are 1,000 small calories: 1 kcal = 4,184 J. 1 kWh = 3.6 MJ = 3,600,000 J. 1 BTU = 1,055.06 J.
About Kilowatt-hours and Calories
Kilowatt-hours (kWh): A thousand watt-hours, or 3.6 MJ; the standard utility billing unit for residential and commercial electricity. Common uses: Electricity bills, residential and EV battery capacity (a typical EV battery is 50-100 kWh), and home solar generation.
Calories (cal): Originally defined as the energy to raise one gram of water by one degree Celsius; exactly 4.184 J in the modern definition (the thermochemical calorie). Common uses: Scientific work in chemistry, where the small calorie is the natural unit for heat-of-reaction measurements.
How the conversion works
Energy uses the SI joule. Food calories (kcal) are 1,000 small calories: 1 kcal = 4,184 J. 1 kWh = 3.6 MJ = 3,600,000 J. 1 BTU = 1,055.06 J.
The exact relationship is calories = kilowatt-hours × 8.60420650e+5, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between kilowatt-hours and calories comes up wherever energy measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.