Joules to Calories (J to cal) Converter
How to convert Joules To Calories
1 cal = 4.184 J.
To convert joules to calories, use the formula: 1 cal = 4.184 J. Enter any value in the input field above and the result appears instantly. Click the ⇄ button to reverse the conversion direction.
All conversions use precise mathematical constants validated against international SI standards (NIST and ISO 80000), accurate to 8 significant figures.
Frequently Asked Questions
How many Calories are in one Joule?
1 cal = 4.184 J. 1 calorie (thermochemical) = 4.184 joules. Note: Food "Calories" (kcal) = 4,184 joules.
What is the formula to convert Joule to Calorie?
1 cal = 4.184 J. Multiply the Joule value by the conversion factor to get Calorie.
How do I convert Calories To Joules?
Use the Calories To Joules converter — formula: 1 cal = 4.184 J. Click the ⇄ switch button above for the reverse conversion.
Is this Joule to Calorie converter free?
Yes — completely free, no registration required. Works instantly in your browser using precise mathematical constants validated against SI standards.