Convert Watt-hours to Kilocalories
Wh to kcal · energy conversion
What are watt-hours and kilocalories?
A watt-hour is the energy of one watt sustained for one hour, equal to 3,600 J. A kilocalorie (the food Calorie) is 1,000 small calories, the unit on US nutrition labels. For reference: a food Calorie is one kilocalorie (4,184 J), and home electricity is billed in kilowatt-hours.
How to convert watt-hours to kilocalories
1 Wh = 0.860421 kcal. To convert, multiply the number of watt-hours by 0.860421. For example, 5 Wh = 4.3021 kcal, and 20 Wh = 17.2084 kcal. To go the other way, multiply kilocalories by 1.16222 (since 1 kcal = 1.16222 Wh).
Watt-hours to Kilocalories conversion table
| Watt-hours (Wh) | Kilocalories (kcal) |
|---|---|
| 1 | 0.860421 |
| 10 | 8.60421 |
| 100 | 86.0421 |
| 500 | 430.21 |
| 1,000 | 860.421 |
| 2,000 | 1,720.84 |
| 5,000 | 4,302.1 |
FAQ
What is 1 Wh in kcal?
1 Wh = 0.860421 kcal. To convert any amount, multiply the number of watt-hours by 0.860421.
How do I convert kilocalories back to watt-hours?
Go the other way: 1 kcal = 1.16222 Wh, so multiply kilocalories by 1.16222 to get watt-hours.
Is a watt-hour bigger than a kilocalorie?
No — 1 Wh is the smaller unit, equal to 0.860421 kcal (it takes 1.16222 Wh to make one kcal).
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.