Calorie to Joule Converter
Convert small calories to joules instantly with an energy calculator built for science, nutrition, HVAC, electricity, engineering, and everyday reference.
cal to J Calculator
Enter an energy value and the conversion updates automatically.
Result updates automatically.
Formula: joules = small calories × 4.184
How to Convert Calorie to Joule
Energy conversion uses joules as the SI reference unit. Multiply the source energy by the factor shown below to convert it into the selected output unit.
1 small calorie
4.184 joules
10 small calories
41.84 joules
100 small calories
418.4 joules
Energy Formula Notes
The calculator converts through joules as the base energy unit, then formats the result for the selected energy unit.
Calories to Joules Converter FAQ
Which energy units are supported?
This tool supports joules, kilojoules, BTU, small calories, kilocalories, watt-hours, kilowatt-hours, foot-pounds, and newton-meters.
How do I convert cal to J?
Multiply the cal value by 4.184 to get J. The calculator performs the formula automatically.
Can I reverse the energy conversion?
Yes. Use the swap button to reverse the selected units and calculate the opposite direction.