Enter kilocalories or watt-hours into the calculator to convert to the other value, with support for kcal, Cal, cal, kJ, J, Wh, kWh, and BTU.
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- Kcal to kW Conversion Calculator
- Cal to kWh Conversion Calculator
- kJ to Calories Calculator
- BTU to Calories Conversion Calculator
- Cal to BTU Conversion Calculator
Kcal to Wh Formula
The following formulas convert kilocalories to watt-hours and back using thermochemical values.
\mathrm{Wh} = \frac{4184}{3600}\,\mathrm{kcal}- 1 kilocalorie (kcal) = 4184 joules (J)
- 1 watt-hour (Wh) = 3600 joules (J)
- 1 Calorie (food Cal) = 1 kilocalorie (kcal)
- 1 small calorie (cal) = 4.184 joules (J)
- 1 kilowatt-hour (kWh) = 3,600,000 joules (J)
- 1 BTU (IT) = 1055.05585262 joules (J)
Kcal to Wh Conversion Table
| Kilocalories (kcal) | Watt-hours (Wh) |
|---|---|
| 1 | 1.162 |
| 2 | 2.324 |
| 5 | 5.811 |
| 10 | 11.622 |
| 20 | 23.244 |
| 25 | 29.056 |
| 50 | 58.111 |
| 75 | 87.167 |
| 100 | 116.222 |
| 150 | 174.333 |
| 200 | 232.444 |
| 250 | 290.556 |
| 300 | 348.667 |
| 500 | 581.111 |
| 1000 | 1162.222 |
| 2000 | 2324.444 |
| * Thermochemical: 1 kcal = 4184 J and 1 Wh = 3600 J; conversion factor: 1 kcal ≈ 1.162222 Wh. | |
How do you convert kilocalories to watt-hours? Multiply kilocalories by 4184/3600 ≈ 1.162222 to get watt-hours.
How do you convert watt-hours to kilocalories? Divide watt-hours by 1.162222 (or multiply by 3600/4184 ≈ 0.859845) to get kilocalories; food Calories (Cal) are equal to kilocalories (kcal).
Example Problem
Convert 250 kcal to Wh.
Use the formula: Wh = kcal × 4184/3600.
Wh = 250 × 1.162222… = 290.556 Wh
