How to Convert Joules to Kilocalories
To convert joules to kilocalories, divide the value by 4184.
The Formula
Kilocalories = Joules ÷ 4184
Key Fact
1 kilocalorie = 4184 joules
Tip: To convert kilocalories back to joules, multiply by 4184.
Joules to Kilocalories
Convert joules (J) to kilocalories (kcal) with formulas, examples, and conversion tables.
J
kcal
1 J = 0.0002 kcal
Full precision:0.00023901 kcal
Step-by-Step Solution
To convert 1 joules to kilocalories, we divide by 4184 because one kilocalorie equals exactly 4184 joules.
1 kilocalorie = 4184 joules
Since there are 4184 joules in every kilocalorie, we divide our value by this factor:
1 ÷ 4184 = 0.0002 kilocalories
So 1 joules = 0.0002 kilocalories.
Quick check: 0.0002 × 4184 = 1 joules
Example Conversions
Example 1: 1 J = 0.0002 kcal
1 ÷ 4184 = 0.0002
1 ÷ 4184 = 0.0002
Example 2: 5 J = 0.0012 kcal
5 ÷ 4184 = 0.0012
5 ÷ 4184 = 0.0012
Example 3: 10 J = 0.0024 kcal
10 ÷ 4184 = 0.0024
10 ÷ 4184 = 0.0024
Joules to Kilocalories Table
| Joules | Kilocalories |
|---|---|
| 1 J | 0.0002 kcal |
| 2 J | 0.0005 kcal |
| 5 J | 0.0012 kcal |
| 10 J | 0.0024 kcal |
| 20 J | 0.0048 kcal |
| 25 J | 0.006 kcal |
| 50 J | 0.012 kcal |
| 100 J | 0.0239 kcal |
| 250 J | 0.0598 kcal |
| 500 J | 0.1195 kcal |
| 1000 J | 0.239 kcal |
1 Joule in Other Units
| Unit | 1 J = |
|---|---|
| Joules to Kilojoules | 0.001 kJ |
| Joules to Megajoules | 0.000001 MJ |
| Joules to Gigajoules | 1e-9 GJ |
| Joules to Watt-hours | 0.000278 Wh |
| Joules to Kilowatt-hours | 2.78e-7 kWh |
| Joules to Megawatt-hours | 2.78e-10 MWh |
| Joules to Calories | 0.239006 cal |
| Joules to Kilocalories | 0.000239 kcal |
| Joules to BTU | 0.000948 BTU |
| Joules to Therms | 9.48e-9 therm |
| Joules to Foot-pounds | 0.737561 ft·lb |
| Joules to Electronvolts | 6.24e+18 eV |
| Joules to Ergs | 10000000 erg |