1 kcal = 1.16222 Wh
1 kilocalorie equals 1.16222 watt-hours. To convert kilocalories to watt-hours, multiply the kilocalorie value by 1.16222. For quick reference: 1 kcal = 1.16222 Wh, 5 kcal = 5.81111 Wh, 10 kcal = 11.6222 Wh, 100 kcal = 116.222 Wh.
Watt-hours = Kilocalories × 1.16222Start with your value in kilocalories.
Multiply the kilocalorie value by 1.16222. This is the exact conversion factor from kilocalories to watt-hours.
The product is your value in watt-hours. For example, 5 kcal × 1.16222 = 5.81111 Wh.
The exact factor from kilocalories to watt-hours is 1.16222.
Watt-hours = Kilocalories × 1.16222
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Kilocalories (kcal) | Watt-hours (Wh) |
|---|---|
| 0.001 kcal | 0.0011622 Wh |
| 0.01 kcal | 0.011622 Wh |
| 0.1 kcal | 0.11622 Wh |
| 0.5 kcal | 0.58111 Wh |
| 1 kcal | 1.1622 Wh |
| 1.5 kcal | 1.7433 Wh |
| 2 kcal | 2.3244 Wh |
| 5 kcal | 5.8111 Wh |
| 10 kcal | 11.622 Wh |
| 20 kcal | 23.244 Wh |
| 50 kcal | 58.111 Wh |
| 100 kcal | 116.22 Wh |
| 200 kcal | 232.44 Wh |
| 250 kcal | 290.56 Wh |
| 500 kcal | 581.11 Wh |
| 1000 kcal | 1162.2 Wh |
| 2000 kcal | 2324.4 Wh |
| 2500 kcal | 2905.6 Wh |
| 3600 kcal | 4184 Wh |
| 5000 kcal | 5811.1 Wh |
| 7500 kcal | 8716.7 Wh |
| 10000 kcal | 11622 Wh |
| 25000 kcal | 29056 Wh |
| 50000 kcal | 58111 Wh |
| 100000 kcal | 116222 Wh |
| 250000 kcal | 290556 Wh |
| 500000 kcal | 581111 Wh |
| 1000000 kcal | 1162222 Wh |
| 2000000 kcal | 2324444 Wh |
| 3600000 kcal | 4184000 Wh |
| 5000000 kcal | 5811111 Wh |
| 10000000 kcal | 11622222 Wh |
| 25000000 kcal | 29055556 Wh |
| 50000000 kcal | 58111111 Wh |
| 100000000 kcal | 116222222 Wh |
| 250000000 kcal | 290555556 Wh |
| 500000000 kcal | 581111111 Wh |
| 1000000000 kcal | 1162222222 Wh |
| 2000000000 kcal | 2324444444 Wh |
| 5000000000 kcal | 5811111111 Wh |
| 10000000000 kcal | 11622222222 Wh |
| 20000000000 kcal | 23244444444 Wh |
| 50000000000 kcal | 58111111111 Wh |
| 100000000000 kcal | 116222222222 Wh |
| 1000000000000 kcal | 1162222222222 Wh |
| 10000000000000 kcal | 11622222222222 Wh |
| 100000000000000 kcal | 116222222222222 Wh |
| 1000000000000000 kcal | 1.1622 × 10^15 Wh |
| 10000000000000000 kcal | 1.1622 × 10^16 Wh |
| 100000000000000000 kcal | 1.1622 × 10^17 Wh |
A medium apple has about 95 kcal. An adult's daily energy need is roughly 2,000–2,500 kcal. In watt-hours, that gives you: 1 kcal = 1.16222 Wh, 10 kcal = 11.6222 Wh, 100 kcal = 116.222 Wh.
The kilocalorie (kcal) equals exactly 4,184 joules — 1,000 small calories. This is the 'Calorie' (capital C) printed on US nutrition labels: when a food package says '250 Calories', it means 250 kcal. Outside the US, food energy is usually labeled in kJ as well.
The watt-hour (Wh) equals 3,600 joules — the energy delivered by one watt of power over one hour. It is the natural unit for batteries, small electronics, and short-duration electrical loads.