Convert kilocalories to joules
1 kcal = 4,184 J. Change the amount below, or read the formula and the reference table further down.
1 kilocalorie equals
joules
1 kcal = 4,184 J
The formula
Kilocalories and joules both measure energy from the same zero, so a single multiplier does the job.
J = kcal × 4,184
Going the other way? Convert joules to kilocalories.
Kilocalories to joules table
Common values, rounded for reading.
| Kilocalories (kcal) | Joules (J) |
|---|---|
| 1 | 4,184 |
| 2 | 8,368 |
| 3 | 12,552 |
| 4 | 16,736 |
| 5 | 20,920 |
| 6 | 25,104 |
| 7 | 29,288 |
| 8 | 33,472 |
| 9 | 37,656 |
| 10 | 41,840 |
| 15 | 62,760 |
| 20 | 83,680 |
| 25 | 104,600 |
| 30 | 125,520 |
| 40 | 167,360 |
| 50 | 209,200 |
| 75 | 313,800 |
| 100 | 418,400 |
| 250 | 1,046,000 |
| 500 | 2,092,000 |
| 1,000 | 4,184,000 |
Questions people ask
- How many joules are in a kilocalorie?
- One kilocalorie equals 4,184 joules.
- How do I convert kilocalories to joules by hand?
- Multiply the number of kilocalories by 4,184. For a rough check, 4,184 is close enough for most everyday use.
- What is 1 kilocalorie in joules?
- 1 kilocalorie is 4,184 joules.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.