Energy conversion
1 thermochemical calorie (cal) equals 0.001 kilocalorie (kcal). Enter any value below to convert from cal to kcal.
Enter a value and choose units. Results update instantly.
1 cal = 0.001 kcal
| Unit | Value |
|---|---|
| Joule J | 4.184 |
| Kilojoule kJ | 0.004184 |
| Thermochemical calorie cal | 1 |
| Kilocalorie kcal | 0.001 |
| Watt-hour Wh | 0.0011622222 |
| Kilowatt-hour kWh | 0.0000011622 |
| BTU (International Table) BTUₕᵀ | 0.0039656668 |
| Foot-pound ft·lb | 3.0859600326 |
| Electronvolt eV | 2.6114473968e19 |
Formula
Use this relationship for a direct conversion:
2 cal = 0.002 kcal.
The thermochemical calorie and International Table BTU are named explicitly to avoid ambiguous legacy definitions.
Quick reference
| Thermochemical calorie (cal) | Kilocalorie (kcal) |
|---|---|
| 0.01 | 0.00001 |
| 0.1 | 0.0001 |
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 1,000 | 1 |
From unit
Exactly 4.184 joules.
Symbol: cal
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 = cal x 0.001. 1 thermochemical calorie (cal) equals 0.001 kilocalorie (kcal).
Both unit definitions use exact factors. Only the displayed decimal may be rounded.
