Kilocalories to Watt-hours Converter
1 kilocalorie ≈ 1.16222222 watt-hours
This is the unit written as "Calories" on nutrition labels.
1 kilocalorie equals 1.16222 watt-hours
How to convert kilocalories to watt-hours
Calories here are thermochemical (4.184 J), while BTU uses the International Table definition. A kilowatt-hour is energy (3.6 MJ), not power; a food Calorie is a kilocalorie.
Wh = kcal × 1.162222222One kilocalorie is 1.162222222 watt-hours, so a single multiplication converts any value.
11.6222 Wh ≈ 10 × 1.162222222This is the unit written as "Calories" on nutrition labels.
Kilocalories to watt-hours conversion table
Common values in kilocalories, converted to watt-hours.
| Kilocalories (kcal) | Watt-hours (Wh) |
|---|---|
| 1 | 1.1622222 |
| 2 | 2.3244444 |
| 3 | 3.4866667 |
| 4 | 4.6488889 |
| 5 | 5.8111111 |
| 10 | 11.622222 |
| 20 | 23.244444 |
| 25 | 29.055556 |
| 50 | 58.111111 |
| 100 | 116.22222 |
| 250 | 290.55556 |
| 500 | 581.11111 |
| 1,000 | 1,162.2222 |
About these units
kilocaloriekcal
One thousand thermochemical calories: exactly 4,184 joules.
watt-hourWh
One watt sustained for one hour: exactly 3,600 joules.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.