How to convert calories to kilowatt-hours
kWh = cal × 0.000001162222222Multiply the value in calories by 0.000001162222222. To go the other way, multiply by 860,420.6501 (or divide by 0.000001162222222).
A calorie is smaller than a kilowatt-hour: it takes 860,420.6501 calories to make one kilowatt-hour.
Worked examples
- 1 calorie (thermochemical)1 cal × 0.000001162222222 = 0.000001162222222 kWh
- 5 calories5 cal × 0.000001162222222 = 0.000005811111111 kWh
- 10 calories10 cal × 0.000001162222222 = 0.00001162222222 kWh
- 20 calories20 cal × 0.000001162222222 = 0.00002324444444 kWh
- 100 calories100 cal × 0.000001162222222 = 0.0001162222222 kWh
Calories to kilowatt-hours conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Calories (cal) | Kilowatt-hours (kWh) |
|---|---|
| 0.1 cal | 1.1622222×10⁻⁷ kWh |
| 0.25 cal | 2.9055556×10⁻⁷ kWh |
| 0.5 cal | 5.8111111×10⁻⁷ kWh |
| 1 cal | 0.0000011622222 kWh |
| 2 cal | 0.0000023244444 kWh |
| 3 cal | 0.0000034866667 kWh |
| 4 cal | 0.0000046488889 kWh |
| 5 cal | 0.0000058111111 kWh |
| 6 cal | 0.0000069733333 kWh |
| 7 cal | 0.0000081355556 kWh |
| 8 cal | 0.0000092977778 kWh |
| 9 cal | 0.00001046 kWh |
| 10 cal | 0.000011622222 kWh |
| Calories (cal) | Kilowatt-hours (kWh) |
|---|---|
| 12 cal | 0.000013946667 kWh |
| 15 cal | 0.000017433333 kWh |
| 20 cal | 0.000023244444 kWh |
| 25 cal | 0.000029055556 kWh |
| 30 cal | 0.000034866667 kWh |
| 40 cal | 0.000046488889 kWh |
| 50 cal | 0.000058111111 kWh |
| 75 cal | 0.000087166667 kWh |
| 100 cal | 0.00011622222 kWh |
| 250 cal | 0.00029055556 kWh |
| 500 cal | 0.00058111111 kWh |
| 1,000 cal | 0.0011622222 kWh |
About the units
Calorie (cal)
The “small” calorie: exactly 4.184 J (thermochemical definition), roughly the energy to heat one gram of water by 1 °C.
Kilowatt-hour (kWh)
Exactly 3.6 MJ. The unit on electricity bills; running a 1,000 W heater for an hour uses 1 kWh. One kilowatt-hour equals 3,600,000 joules (J).
Frequently asked questions
How many kilowatt-hours are in one calorie?
There are 0.000001162222222 kilowatt-hours in one calorie, and this value is exact by definition.
How do I convert calories to kilowatt-hours?
Multiply the number of calories by 0.000001162222222. For example, 10 cal × 0.000001162222222 = 0.00001162222222 kWh.
How many calories are in one kilowatt-hour?
One kilowatt-hour equals 860,420.6501 calories. That is the reverse factor, 1 ÷ 0.000001162222222.
What is 10 calories in kilowatt-hours?
10 cal = 0.00001162222222 kWh.
Is this cal to kWh converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.