100 calories to kilojoules
100 cal = 0.4184 kJ. Change the amount below, or read the formula and the reference table further down.
100 calories 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 100 cal.
| Calories (cal) | Kilojoules (kJ) |
|---|---|
| 0 | 0 |
| 10 | 0.04184 |
| 20 | 0.08368 |
| 30 | 0.12552 |
| 40 | 0.16736 |
| 50 | 0.2092 |
| 60 | 0.25104 |
| 70 | 0.29288 |
| 80 | 0.33472 |
| 90 | 0.37656 |
| 100 | 0.4184 |
| 110 | 0.46024 |
| 120 | 0.50208 |
| 130 | 0.54392 |
| 140 | 0.58576 |
| 150 | 0.6276 |
| 160 | 0.66944 |
| 170 | 0.71128 |
| 180 | 0.75312 |
| 190 | 0.79496 |
| 200 | 0.8368 |
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 100 calories in kilojoules?
- 100 calories is 0.4184 kilojoules.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.