Convert calories to kilowatt-hours
Converting calories to kilowatt-hours is a common energy task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 cal equals 0.00000116222 kWh, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert calories to kilowatt-hours
To convert calories to kilowatt-hours, multiply the number of calories by 0.00000116222. For example, 10 cal × 0.00000116222 = 0.0000116222 kWh.
kWh = cal × 0.00000116222
- Write down the value in calories you want to convert.
- Multiply it by 0.00000116222 (the exact cal→kWh factor).
- The result is your value in kilowatt-hours. Check it below with the converter or the table.
Conversion table
Common values of calories and their equivalents in kilowatt-hours:
| cal | kWh |
|---|---|
| 1 | 0.00000116222 |
| 2 | 0.00000232444 |
| 3 | 0.00000348667 |
| 4 | 0.00000464889 |
| 5 | 0.00000581111 |
| 10 | 0.0000116222 |
| 20 | 0.0000232444 |
| 25 | 0.0000290556 |
| 50 | 0.0000581111 |
| 100 | 0.000116222 |
| 250 | 0.000290556 |
| 500 | 0.000581111 |
About these units
Calorie (cal). The small calorie is the energy needed to raise one gram of water by 1 °C, defined as exactly 4.184 joules. It is mostly used in chemistry and heat calculations.
Kilowatt-hour (kWh). A kilowatt-hour is the energy delivered by one kilowatt over one hour, exactly 3.6 million joules. Household electricity bills and EV batteries are measured in kWh.
Frequently asked questions
How do I convert calories to kilowatt-hours?
To convert calories to kilowatt-hours, multiply the number of calories by 0.00000116222. For example, 10 cal × 0.00000116222 = 0.0000116222 kWh. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many kilowatt-hours are in 1 calorie?
1 cal = 0.00000116222 kWh. That is the fixed relationship used by this converter and by international standards.
How many calories are in 1 kilowatt-hour?
1 kWh = 860,421 cal. If you are converting in the opposite direction, use our Kilowatt-hour to Calorie converter for the dedicated table and FAQ.
Is the calories to kilowatt-hours conversion exact?
Yes. Both units are defined by international agreement, so the factor of 0.00000116222 is exact. Displayed results are rounded to 6 significant digits only for readability.
What is calorie used for?
The small calorie is the energy needed to raise one gram of water by 1 °C, defined as exactly 4.184 joules. It is mostly used in chemistry and heat calculations.