Kilocalorie to Joule Converter
Convert kilocalories to joules with this free energy converter. The exact relationship used on this page is 1 kilocalorie = 4184 joules. 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: Joule = Kilocalorie × 4184
How to convert kilocalories to joules
- Enter the value in kilocalories in the converter.
- Read the equivalent amount in joules.
- Use the swap link if you need joule to kilocalorie instead.
- Check the table for common values without typing.
Worked examples
- 1 kcal = 4,184 J
- 5 kcal = 20,920 J
- 10 kcal = 41,840 J
- 25 kcal = 104,600 J
Conversion table
Common kilocalories values converted to joules.
| kcal | J |
|---|---|
| 1 | 4,184 |
| 2 | 8,368 |
| 3 | 12,552 |
| 4 | 16,736 |
| 5 | 20,920 |
| 6 | 25,104 |
| 7 | 29,288 |
| 8 | 33,472 |
| 9 | 37,656 |
| 10 | 41,840 |
| 20 | 83,680 |
| 50 | 209,200 |
| 100 | 418,400 |
| 250 | 1,046,000 |
| 500 | 2,092,000 |
| 1,000 | 4,184,000 |
About this conversion
Kilocalorie (kcal) and Joule (J) 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 joules often, then explore related pairs in the same category if you need a different target unit.
Need the other direction? Open the joule to kilocalorie converter.
FAQ
How many joules are in 1 kilocalorie?+
1 kilocalorie equals 4184 joules.
What is the formula to convert kilocalories to joules?+
Joule = Kilocalorie × 4184
How do I convert kilocalories to joules by hand?+
Multiply the kilocalorie value by 4184. Example: 10 kilocalories × 4184 = 41840 joules.
Is this kcal to J 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.