Kilocalorie to Kilojoule Converter
Convert kilocalories to kilojoules with this free energy converter. The exact relationship used on this page is 1 kilocalorie = 4.184 kilojoules. Type any number — the result updates instantly, works on phones and desktops, and is ready to copy into homework, a spec sheet, or a shopping list.
Formula: Kilojoule = Kilocalorie × 4.184
How to convert kilocalories to kilojoules
- Enter the value in kilocalories in the converter.
- Read the equivalent amount in kilojoules.
- Use the swap link if you need kilojoule to kilocalorie instead.
- Check the table for common values without typing.
Worked examples
- 1 kcal = 4.184 kJ
- 5 kcal = 20.92 kJ
- 10 kcal = 41.84 kJ
- 25 kcal = 104.6 kJ
Conversion table
Common kilocalories values converted to kilojoules.
| kcal | kJ |
|---|---|
| 1 | 4.184 |
| 2 | 8.368 |
| 3 | 12.552 |
| 4 | 16.736 |
| 5 | 20.92 |
| 6 | 25.104 |
| 7 | 29.288 |
| 8 | 33.472 |
| 9 | 37.656 |
| 10 | 41.84 |
| 20 | 83.68 |
| 50 | 209.2 |
| 100 | 418.4 |
| 250 | 1,046 |
| 500 | 2,092 |
| 1,000 | 4,184 |
About this conversion
Kilocalorie (kcal) and Kilojoule (kJ) are both energy units. Energy converters connect food labels (kcal), electricity bills (kWh), physics (joules), and heating (BTU). Bookmark this URL when you convert kilocalories to kilojoules often, then explore related pairs in the same category if you need a different target unit.
Need the other direction? Open the kilojoule to kilocalorie converter.
FAQ
How many kilojoules are in 1 kilocalorie?+
1 kilocalorie equals 4.184 kilojoules.
What is the formula to convert kilocalories to kilojoules?+
Kilojoule = Kilocalorie × 4.184
How do I convert kilocalories to kilojoules by hand?+
Multiply the kilocalorie value by 4.184. Example: 10 kilocalories × 4.184 = 41.84 kilojoules.
Is this kcal to kJ converter accurate?+
Yes. Linear conversions use internationally agreed factors relative to SI. Temperature and inverse fuel units use the standard offset or reciprocal formulas, not a guessed scale factor.