kcal to joules converter
1 kilocalory equals 4,184 joules. Conversions use J = kcal × 4184
kcal → 4,184 J
J = kcal × 4184
Converter
Worked examples
- 1 kcal = 4,184 J
- 2 kcal = 8,368 J
- 5 kcal = 20,920 J
- 10 kcal = 41,840 J
- 100 kcal = 418,400 J
kilocalories (food calories) to joules conversion table
| kcal | J | Arithmetic |
|---|---|---|
| 1 kcal | 4,184 J | × 4184 |
| 2 kcal | 8,368 J | × 4184 |
| 3 kcal | 12,552 J | × 4184 |
| 4 kcal | 16,736 J | × 4184 |
| 5 kcal | 20,920 J | × 4184 |
| 6 kcal | 25,104 J | × 4184 |
| 8 kcal | 33,472 J | × 4184 |
| 10 kcal | 41,840 J | × 4184 |
| 12 kcal | 50,208 J | × 4184 |
| 15 kcal | 62,760 J | × 4184 |
| 20 kcal | 83,680 J | × 4184 |
| 25 kcal | 104,600 J | × 4184 |
| 30 kcal | 125,520 J | × 4184 |
| 40 kcal | 167,360 J | × 4184 |
| 50 kcal | 209,200 J | × 4184 |
| 60 kcal | 251,040 J | × 4184 |
| 70 kcal | 292,880 J | × 4184 |
| 80 kcal | 334,720 J | × 4184 |
| 90 kcal | 376,560 J | × 4184 |
| 100 kcal | 418,400 J | × 4184 |
How to convert kcal to J
- Take your value in kilocalories (food calories).
- Multiply by 4184
- That is your answer in joules — no rounding needed until you choose a display precision.
Related conversions
J to kcalJ to kJJ to calJ to WhJ to kWhJ to BtukJ to Jcal to Jkcal to kJall energy units
Questions
How many joules in 1 kilocalory?
Exactly 4,184 J. The factor follows from the definitions of both units, not from a measurement, so it is exact.
How do I convert kcal to J?
Multiply the kilocalories (food calories) figure by 4184 — or use the converter above, which updates as you type.
Is kcal to J the same as J to kcal?
No — they are inverses. One kcal is 4,184 J, while one J is 0.0002390057 kcal.
What is 1 kcal in J?
1 kcal = 4,184 J (see the value page for the full arithmetic).