Convert Kilocalories to Watt-hours
kcal to Wh · energy conversion
What are kilocalories and watt-hours?
A kilocalorie (the food Calorie) is 1,000 small calories, the unit on US nutrition labels. A watt-hour is the energy of one watt sustained for one hour, equal to 3,600 J. For reference: a food Calorie is one kilocalorie (4,184 J), and home electricity is billed in kilowatt-hours.
How to convert kilocalories to watt-hours
1 kcal = 1.16222 Wh. To convert, multiply the number of kilocalories by 1.16222. For example, 5 kcal = 5.81111 Wh, and 20 kcal = 23.2444 Wh. To go the other way, multiply watt-hours by 0.860421 (since 1 Wh = 0.860421 kcal).
Kilocalories to Watt-hours conversion table
| Kilocalories (kcal) | Watt-hours (Wh) |
|---|---|
| 1 | 1.16222 |
| 10 | 11.6222 |
| 100 | 116.222 |
| 500 | 581.111 |
| 1,000 | 1,162.22 |
| 2,000 | 2,324.44 |
| 5,000 | 5,811.11 |
FAQ
What is 1 kcal in Wh?
1 kcal = 1.16222 Wh. To convert any amount, multiply the number of kilocalories by 1.16222.
How do I convert watt-hours back to kilocalories?
Go the other way: 1 Wh = 0.860421 kcal, so multiply watt-hours by 0.860421 to get kilocalories.
Is a kilocalorie bigger than a watt-hour?
Yes — 1 kcal is the larger unit, equal to 1.16222 Wh.
Are these energy conversions exact?
They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.