Energy conversion
1 watt-hour (Wh) equals 0.860420650096 kilocalorie (kcal). Enter any value below to convert from Wh to kcal.
Enter a value and choose units. Results update instantly.
1 Wh = 0.8604206501 kcal
| Unit | Value |
|---|---|
| Joule J | 3,600 |
| Kilojoule kJ | 3.6 |
| Thermochemical calorie cal | 860.4206500956 |
| Kilocalorie kcal | 0.8604206501 |
| Watt-hour Wh | 1 |
| Kilowatt-hour kWh | 0.001 |
| BTU (International Table) BTUₕᵀ | 3.4121416331 |
| Foot-pound ft·lb | 2,655.2237373982 |
| Electronvolt eV | 2.2469432668e22 |
Formula
Use this relationship for a direct conversion:
2 Wh = 1.7208413002 kcal.
The thermochemical calorie and International Table BTU are named explicitly to avoid ambiguous legacy definitions.
Quick reference
| Watt-hour (Wh) | Kilocalorie (kcal) |
|---|---|
| 0.01 | 0.0086042065 |
| 0.1 | 0.086042065 |
| 1 | 0.8604206501 |
| 2 | 1.7208413002 |
| 5 | 4.3021032505 |
| 10 | 8.604206501 |
| 25 | 21.5105162524 |
| 50 | 43.0210325048 |
| 100 | 86.0420650096 |
| 1,000 | 860.4206500956 |
From unit
The energy from one watt sustained for one hour.
Symbol: Wh
To unit
One thousand thermochemical calories.
Symbol: kcal
Keep converting
Source
Definitions are checked against NIST SP 811: Energy units. Calculations use full internal precision before display rounding.
View the complete energy converterQuestions
Use the formula kcal = Wh x 0.860420650096. 1 watt-hour (Wh) equals 0.860420650096 kilocalorie (kcal).
Both unit definitions use exact factors. Only the displayed decimal may be rounded.
