How to Convert Calories to Joules
To convert calories to joules, multiply the value by 4.184.
The Formula
Joules = Calories × 4.184
Key Fact
1 calorie = 4.184 joules
Tip: To convert joules back to calories, divide by 4.184.
Calories to Joules
Convert calories (cal) to joules (J) with formulas, examples, and conversion tables.
cal
J
1 cal = 4.184 J
Full precision:4.184 J
Step-by-Step Solution
To convert 1 calories to joules, we multiply by 4.184 because one calorie equals exactly 4.184 joules.
1 calorie = 4.184 joules
Since each calorie contains 4.184 joules, we multiply our value by this factor:
1 × 4.184 = 4.184 joules
So 1 calories = 4.184 joules.
Quick check: 4.184 ÷ 4.184 = 1 calories
Example Conversions
Example 1: 1 cal = 4.184 J
1 × 4.184 = 4.184
1 × 4.184 = 4.184
Example 2: 5 cal = 20.92 J
5 × 4.184 = 20.92
5 × 4.184 = 20.92
Example 3: 10 cal = 41.84 J
10 × 4.184 = 41.84
10 × 4.184 = 41.84
Calories to Joules Table
| Calories | Joules |
|---|---|
| 1 cal | 4.184 J |
| 2 cal | 8.368 J |
| 5 cal | 20.92 J |
| 10 cal | 41.84 J |
| 20 cal | 83.68 J |
| 25 cal | 104.6 J |
| 50 cal | 209.2 J |
| 100 cal | 418.4 J |
| 250 cal | 1046 J |
| 500 cal | 2092 J |
| 1000 cal | 4184 J |
1 Calorie in Other Units
| Unit | 1 cal = |
|---|---|
| Calories to Joules | 4.184 J |
| Calories to Kilojoules | 0.004184 kJ |
| Calories to Megajoules | 0.000004 MJ |
| Calories to Gigajoules | 4.18e-9 GJ |
| Calories to Watt-hours | 0.001162 Wh |
| Calories to Kilowatt-hours | 0.000001 kWh |
| Calories to Megawatt-hours | 1.16e-9 MWh |
| Calories to Kilocalories | 0.001 kcal |
| Calories to BTU | 0.003966 BTU |
| Calories to Therms | 3.97e-8 therm |
| Calories to Foot-pounds | 3.086 ft·lb |
| Calories to Electronvolts | 2.61e+19 eV |
| Calories to Ergs | 41840000 erg |