Convert Kilocalories to Watt-hours
One kilocalorie equals 1.162222 watt-hours. Type any value to convert kilocalories to watt-hours instantly — with a full reference table below.
Convert Kilocalories to Watt-hours
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How to convert Kilocalories to Watt-hours
To convert kilocalories to watt-hours, multiply by 1.162222. One kilocalorie equals 1.162222 Wh, and one watt-hour equals 0.860421 kcal.
- Take the value in kilocalories — for example 7.5 kcal.
- Multiply by 1.162222 (the number of watt-hours in one kilocalorie).
- 7.5 × 1.162222 = 8.716667 Wh.
Quick mental estimate: Divide the number of kilocalories by 0.86 (accurate to better than 0.05%).
Kilocalories to Watt-hours conversion table
| Kilocalories | Watt-hours |
|---|---|
| 1 kcal | 1.162222 Wh |
| 2 kcal | 2.324444 Wh |
| 5 kcal | 5.811111 Wh |
| 10 kcal | 11.62222 Wh |
| 20 kcal | 23.24444 Wh |
| 50 kcal | 58.11111 Wh |
| 100 kcal | 116.2222 Wh |
| 200 kcal | 232.4444 Wh |
| 500 kcal | 581.1111 Wh |
| 1,000 kcal | 1,162.222 Wh |
| 2,000 kcal | 2,324.444 Wh |
| Watt-hours | Kilocalories |
|---|---|
| 1 Wh | 0.860421 kcal |
| 2 Wh | 1.720841 kcal |
| 5 Wh | 4.302103 kcal |
| 10 Wh | 8.604207 kcal |
| 20 Wh | 17.20841 kcal |
| 50 Wh | 43.02103 kcal |
| 100 Wh | 86.04207 kcal |
| 200 Wh | 172.0841 kcal |
| 500 Wh | 430.2103 kcal |
| 1,000 Wh | 860.4207 kcal |
| 2,000 Wh | 1,720.841 kcal |
About converting Kilocalories to Watt-hours
Kilocalories (kcal) and Watt-hours (Wh) are both units of energy. The exact factor is 1 kcal = 1.162222 Wh, so multiply by 1.162222 to go from kilocalories to watt-hours (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Watt-hours to Kilocalories converter, or the full unit converter for every unit at once.
Real-world energy in kilocalories and watt-hours
| Example | Kilocalories | Watt-hours |
|---|---|---|
| One food Calorie (kcal) | 1 kcal | 1.162222 Wh |
| A 100 W bulb running for one hour | 86.04207 kcal | 100 Wh |
| A smartphone battery (≈19 Wh) | ≈ 16.5631 kcal | ≈ 19.25 Wh |
| A 2,000 kcal daily diet | 2,000 kcal | 2,324.444 Wh |
| One kilowatt-hour | 860.4207 kcal | 1,000 Wh |
“≈” marks typical values; the rest are defined or measured figures.
The units
1,000 calories, exactly 4,184 J — the 'Calorie' on food labels.
Used for: Nutrition and diets.
One watt for one hour: exactly 3,600 J.
Used for: Battery capacity (power banks, laptops).
The thermochemical calorie is exactly 4.184 J and a kilowatt-hour is exactly 3.6 MJ, so these factors are exact.