100 calories to joules
100 cal = 418.4 J. Change the amount below, or read the formula and the reference table further down.
100 calories equals
joules
1 cal = 4.184 J
The formula
Calories and joules both measure energy from the same zero, so a single multiplier does the job.
J = cal × 4.184
Going the other way? Convert joules to calories.
Calories to joules table
Values either side of 100 cal.
| Calories (cal) | Joules (J) |
|---|---|
| 0 | 0 |
| 10 | 41.84 |
| 20 | 83.68 |
| 30 | 125.52 |
| 40 | 167.36 |
| 50 | 209.2 |
| 60 | 251.04 |
| 70 | 292.88 |
| 80 | 334.72 |
| 90 | 376.56 |
| 100 | 418.4 |
| 110 | 460.24 |
| 120 | 502.08 |
| 130 | 543.92 |
| 140 | 585.76 |
| 150 | 627.6 |
| 160 | 669.44 |
| 170 | 711.28 |
| 180 | 753.12 |
| 190 | 794.96 |
| 200 | 836.8 |
Questions people ask
- How many joules are in a calorie?
- One calorie equals 4.184 joules.
- How do I convert calories to joules by hand?
- Multiply the number of calories by 4.184. For a rough check, 4.2 is close enough for most everyday use.
- What is 100 calories in joules?
- 100 calories is 418.4 joules.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.