Energy Converter (Joules to Calories) Formula

Understand the math behind the energy converter (joules to calories). Each variable explained with a worked example.

Use the Energy Converter (Joules to Calories)

Formulas Used

Calories

calories = value * 0.239006

Kilowatt-Hours

kwh = value / 3600000

Variables

VariableDescriptionDefault
valueEnergy(J)4184

How It Works

How to Convert Joules to Calories

Formulas

Calories = Joules × 0.239006

kWh = Joules / 3,600,000

1 joule equals 0.239006 calories. 1 kilocalorie (food calorie) equals 4,184 joules.

Worked Example

Convert 4184 joules to calories and kWh.

value = 4184
  1. 01Calories = 4184 × 0.239006 = 1000.02 cal (approximately 1 kcal)
  2. 02kWh = 4184 / 3600000 = 0.00116222 kWh

Frequently Asked Questions

How do you convert joules to calories?

Multiply the energy in joules by 0.239006 to get calories. Note that food calories (kcal) are 1000 times larger than thermochemical calories.

How many joules are in a kilowatt-hour?

There are 3,600,000 joules in 1 kilowatt-hour.

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