Energy conversion
1 watt-hour (Wh) equals 860.420650095602 thermochemical calorie (cal). Enter any value below to convert from Wh to cal.
Enter a value and choose units. Results update instantly.
1 Wh = 860.4206500956 cal
| 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 = 1,720.8413001912 cal.
The thermochemical calorie and International Table BTU are named explicitly to avoid ambiguous legacy definitions.
Quick reference
| Watt-hour (Wh) | Thermochemical calorie (cal) |
|---|---|
| 0.01 | 8.604206501 |
| 0.1 | 86.0420650096 |
| 1 | 860.4206500956 |
| 2 | 1,720.8413001912 |
| 5 | 4,302.103250478 |
| 10 | 8,604.206500956 |
| 25 | 21,510.5162523901 |
| 50 | 43,021.0325047801 |
| 100 | 86,042.0650095602 |
| 1,000 | 860,420.6500956023 |
From unit
The energy from one watt sustained for one hour.
Symbol: Wh
To unit
Exactly 4.184 joules.
Symbol: cal
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 cal = Wh x 860.420650095602. 1 watt-hour (Wh) equals 860.420650095602 thermochemical calorie (cal).
Both unit definitions use exact factors. Only the displayed decimal may be rounded.
