1 calorie to kilojoules
1 cal = 0.004184 kJ. Change the amount below, or read the formula and the reference table further down.
1 calorie equals
kilojoules
1 cal = 0.004184 kJ
The formula
Calories and kilojoules both measure energy from the same zero, so a single multiplier does the job.
kJ = cal × 0.004184
Going the other way? Convert kilojoules to calories.
Calories to kilojoules table
Values either side of 1 cal.
| Calories (cal) | Kilojoules (kJ) |
|---|---|
| -4 | -0.016736 |
| -3.5 | -0.014644 |
| -3 | -0.012552 |
| -2.5 | -0.01046 |
| -2 | -0.008368 |
| -1.5 | -0.006276 |
| -1 | -0.004184 |
| -0.5 | -0.002092 |
| 0 | 0 |
| 0.5 | 0.002092 |
| 1 | 0.004184 |
| 1.5 | 0.006276 |
| 2 | 0.008368 |
| 2.5 | 0.01046 |
| 3 | 0.012552 |
| 3.5 | 0.014644 |
| 4 | 0.016736 |
| 4.5 | 0.018828 |
| 5 | 0.02092 |
| 5.5 | 0.023012 |
| 6 | 0.025104 |
Questions people ask
- How many kilojoules are in a calorie?
- One calorie equals 0.004184 kilojoules.
- How do I convert calories to kilojoules by hand?
- Multiply the number of calories by 0.004184. For a rough check, 0.004 is close enough for most everyday use.
- What is 1 calorie in kilojoules?
- 1 calorie is 0.004184 kilojoules.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.