Energy conversion
1 kilocalorie (kcal) equals 4,184 joule (J). Enter any value below to convert from kcal to J.
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1 kcal = 4,184 J
| Unit | Value |
|---|---|
| Joule J | 4,184 |
| Kilojoule kJ | 4.184 |
| Thermochemical calorie cal | 1,000 |
| Kilocalorie kcal | 1 |
| Watt-hour Wh | 1.1622222222 |
| Kilowatt-hour kWh | 0.0011622222 |
| BTU (International Table) BTUₕᵀ | 3.9656668314 |
| Foot-pound ft·lb | 3,085.9600325761 |
| Electronvolt eV | 2.6114473968e22 |
Formula
Use this relationship for a direct conversion:
2 kcal = 8,368 J.
The thermochemical calorie and International Table BTU are named explicitly to avoid ambiguous legacy definitions.
Quick reference
| Kilocalorie (kcal) | Joule (J) |
|---|---|
| 0.01 | 41.84 |
| 0.1 | 418.4 |
| 1 | 4,184 |
| 2 | 8,368 |
| 5 | 20,920 |
| 10 | 41,840 |
| 25 | 104,600 |
| 50 | 209,200 |
| 100 | 418,400 |
| 1,000 | 4,184,000 |
From unit
One thousand thermochemical calories.
Symbol: kcal
To unit
The SI unit of energy, equal to one newton meter.
Symbol: J
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 J = kcal x 4,184. 1 kilocalorie (kcal) equals 4,184 joule (J).
Both unit definitions use exact factors. Only the displayed decimal may be rounded.
