Kilocalories (kcal) to Watt-hours (W·h) Conversion
Kilocalories
The kilocalorie (kcal), commonly called a "Calorie" (capital C) in nutritional contexts, is a unit of energy equal to exactly 4,184 joules. It represents the energy needed to raise 1 kg of water by 1 °C. In nutrition, all food energy values are expressed in kcal per gram: carbohydrates and protein provide 4 kcal/g; fat provides 9 kcal/g; alcohol provides 7 kcal/g. An average adult requires approximately 2,000–2,500 kcal per day to maintain body weight.
Watt-hours
The watt-hour (W·h) is a unit of energy equal to exactly 3,600 joules, defined as the energy consumed by a one-watt device operating for one hour. It is used in electrical engineering and consumer electronics for expressing battery capacities: a smartphone battery typically holds 10–20 Wh. In aviation, aircraft battery capacities are specified in watt-hours for international transport regulations (lithium batteries above 100 Wh face restrictions).
| Kilocalories (kcal) | Watt-hours (W·h) |
|---|---|
| 0.1 kcal | 0.1162 W·h |
| 1 kcal | 1.1622 W·h |
| 2 kcal | 2.3244 W·h |
| 3 kcal | 3.4867 W·h |
| 5 kcal | 5.8111 W·h |
| 10 kcal | 11.6222 W·h |
| 20 kcal | 23.2444 W·h |
| 30 kcal | 34.8667 W·h |
| 50 kcal | 58.1111 W·h |
| 100 kcal | 116.2222 W·h |
| 1000 kcal | 1,162.2222 W·h |
Frequently Asked Questions (FAQ)
How many watt-hours are in 1 kilocalories?
1 kilocalories (kcal) is exactly 1.1622 watt-hours (W·h).
How do I convert kilocalories to watt-hours?
Multiply the value in kilocalories by 1.1622 to get the result in watt-hours. Or use the converter above — type any number and see the result instantly.