Smart Converter Pro
Smart Converter Pro

Convert Calories to Joules

Convert calories to joules (cal to J) instantly. Free, accurate calories to joules calculator with conversion formula and chart.

4.184

1 cal = 4.184 J

Conversion formula

1 calorie = 4.184 joules

Multiply a value in calories by 4.184 to get joules; divide by the same number to convert back.

Calories to Joules conversion table

Calories (cal)Joules (J)
1 cal4.184 J
2 cal8.368 J
5 cal20.92 J
10 cal41.84 J
25 cal104.6 J
50 cal209.2 J
100 cal418.4 J
500 cal2,092 J
1,000 cal4,184 J
  • For example, 12 calories is 50.208 joules.
  • A value of 75 calories converts to 313.8 joules.
  • Going the other way, 1 joule is 0.239006 calories.

More energy conversions

About Calories to Joules

Easily convert calories (cal) to joules (J) with this free, instant calculator. Enter a value in calories to see the equivalent in joules right away — accurate and calculated in your browser.

How to use Calories to Joules

  1. 1

    Enter the number of calories you want to convert.

  2. 2

    The equivalent value in joules appears instantly.

  3. 3

    Switch units anytime to convert in either direction.

How to convert Calories to Joules

Enter any value in calories (cal) and this calculator instantly shows the equivalent in joules (J) using the exact internationally agreed conversion factor — no rounding tricks, no ads in the way, and it works offline once the page is loaded.

Use the swap button to convert in the other direction (joules to calories), or switch to any other energy unit from the dropdown — the same page handles joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, btu, electronvolts.

Frequently Asked Questions

How do you convert calories to joules?

Enter your value in calories and the converter instantly shows the result in joules using the exact conversion factor.

Is the calories to joules converter free?

Yes — it's completely free, instant and requires no sign-up.

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