Joules to Calories Converter
Convert joules to calories. Includes both small calories and kilocalories (food calories).
4,184 joules =
1,000 cal
or 1 kcal (food calories)
All Conversions
1,000
Calories (cal)
1
Kilocalories (kcal)
4.184
Kilojoules (kJ)
3.9657
BTU
Formula
calories = joules ÷ 4.184
4,184 ÷ 4.184 = 1,000 cal
Calorie Types
Small calorie (cal)
Energy to raise 1 gram of water by 1°C. Used in science.
Large calorie (Cal or kcal)
1000 small calories. Used in nutrition (food calories).
Quick Reference
1 J
= 0.239 cal
4.184 J
= 1 cal
4184 J
= 1 kcal
1 kJ
= 0.239 kcal