1 kilocalorie to kilojoules
1 kcal = 4.184 kJ. Change the amount below, or read the formula and the reference table further down.
1 kilocalorie equals
kilojoules
1 kcal = 4.184 kJ
The formula
Kilocalories and kilojoules both measure energy from the same zero, so a single multiplier does the job.
kJ = kcal × 4.184
Going the other way? Convert kilojoules to kilocalories.
Kilocalories to kilojoules table
Values either side of 1 kcal.
| Kilocalories (kcal) | Kilojoules (kJ) |
|---|---|
| -4 | -16.736 |
| -3.5 | -14.644 |
| -3 | -12.552 |
| -2.5 | -10.46 |
| -2 | -8.368 |
| -1.5 | -6.276 |
| -1 | -4.184 |
| -0.5 | -2.092 |
| 0 | 0 |
| 0.5 | 2.092 |
| 1 | 4.184 |
| 1.5 | 6.276 |
| 2 | 8.368 |
| 2.5 | 10.46 |
| 3 | 12.552 |
| 3.5 | 14.644 |
| 4 | 16.736 |
| 4.5 | 18.828 |
| 5 | 20.92 |
| 5.5 | 23.012 |
| 6 | 25.104 |
Questions people ask
- How many kilojoules are in a kilocalorie?
- One kilocalorie equals 4.184 kilojoules.
- How do I convert kilocalories to kilojoules by hand?
- Multiply the number of kilocalories by 4.184. For a rough check, 4.2 is close enough for most everyday use.
- What is 1 kilocalorie in kilojoules?
- 1 kilocalorie is 4.184 kilojoules.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.