100 Calories to Joules
100 cal = 418.4 J
100 calories equals 418.4 joules.
How to convert 100 cal to J
Use the formula J = cal × 4.184:
J = 100 × 4.184J = 418.4
So 100 cal = 418.4 J.
Rounded values and quick estimate
- Rounded to a whole number: 418 J
- Rounded to one decimal place: 418.4 J
- Conversion factor: 1 calorie = 4.18 joules
This conversion is exact, so there is no need to estimate: just multiply by 4.184.
100 Calories in other units
- Joules
- 418.4 J
- Kilojoules
- 0.4184 kJ
- Kilocalories (food Calories)
- 0.1 kcal
- US therms
- 0.000004 thm
- Kilowatt-hours
- 0.000116 kWh
100 cal and nearby values
| Calories | Joules |
|---|---|
| 96 cal | 401.66 J |
| 97 cal | 405.85 J |
| 98 cal | 410.03 J |
| 99 cal | 414.22 J |
| 100 cal | 418.4 J |
| 101 cal | 422.58 J |
| 102 cal | 426.77 J |
| 103 cal | 430.95 J |
| 104 cal | 435.14 J |
About calories and joules
The small (thermochemical) calorie is exactly 4.184 joules — the energy to warm 1 gram of water by about 1 °C.
The joule is the SI unit of energy. One food Calorie (kcal) equals 4,184 joules.
Related conversions
Frequently asked questions
What is 100 Calories in Joules?
100 calories is 418.4 joules (100 cal = 418.4 J).
How do you convert 100 cal to J?
Apply J = cal × 4.184: J = 100 × 4.184, J = 418.4.
How many calories is 418.4 J?
418.4 J is about 100 calories.