⚡ Energy
calories to joules Converter
Convert calories to joules instantly with a reference conversion table.
Quick answer: To convert calories to joules, multiply by 4.184. For example, 1 calories = 4.184 joules. Use the calculator below for any value.
calories to joules
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Common conversions
| calories | joules |
|---|
Formula:
How to convert calories to joules
1
Enter your value
Type the number of calories you want to convert into the left box. The result in joules appears instantly in the right box. You can also type into the right box to convert in the other direction.
2
Use the swap button
Click the ⇄ Swap button to reverse the conversion — joules to calories. Your current value carries across so you don't have to re-enter anything.
3
About calories and joules
calories and joules are common energy measurements.
📊 Common conversions at a glance
| calories | joules |
|---|---|
| 1 | 4.184 |
| 10 | 41.84 |
| 50 | 209.2 |
| 100 | 418.4 |
| 239 | 1000 |
| 500 | 2092 |
Reviewed for 2026. calories ↔ joules conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.
Frequently asked questions
How do I convert calories to joules?
To convert calories to joules, multiply by 4.184. Or use the calculator above for instant results.
How many joules are in 1 calories?
1 calories equals 4.184 joules.
Is the calories to joules converter free?
Yes, the calories to joules converter is completely free with no sign-up required, no downloads, and it works offline once the page has loaded.