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Joule To Calorie Calculator

Work out joule to calorie instantly with clear inputs, formula shown and shareable results.

About Joule To Calorie Calculator

Converting Joules to Calories is one multiplication: a single J is 0.23900574 cal, so the amount is scaled by that factor. Reversing the direction divides by the same factor. The factor is an exact definition rather than a rounded figure, so the result stays precise at any magnitude. This uses the thermochemical calorie of exactly 4.184 J. A food 'Calorie' on a nutrition label is a kilocalorie — 1,000 of these.

Formulas

Joules → Calories

cal = J × 0.23900574

Calories → Joules

J = cal ÷ 0.23900574

Worked example

With the default values below, Joule To Calorie Calculator returns Converted Value of 239.005736. Change any input above and every figure here is recalculated in your browser.

Inputs used

Amount to convert
1,000
Directionone of Joules → Calories, Calories → Joules
Joules → Calories

Results

Converted Value
239.005736
Result Unit
cal
Multiplier Applied
0.23900574
Conversion Used
1 J = 0.23900574 cal

Step by step

  1. 1Values used
  2. 2Joules → Calories
  3. 3Calories → Joules
  4. 4Converted Value= 239.005736
  5. 5Result Unit= cal
  6. 6Multiplier Applied= 0.23900574
  7. 7Conversion Used= 1 J = 0.23900574 cal

Assumptions and limits

  • The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 8 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How many cal are in one J?

One J equals 0.23900574 cal. That value is exact by definition.

How do I go from Calories back to Joules?

Divide by 0.23900574 rather than multiplying, or flip the direction selector which does it for you.

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