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Calories to Joules converter

Convert cal to J instantly. Type any value and get the result in joules. 1 cal = 4.184 J.

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Energy›cal → J
From
To
result below ↓
1 cal=
4.184J
formula1 cal = 4.184 J

Common calories → joules

=4.184 J
=8.368 J
=20.92 J
=41.84 J
=83.68 J
=209.2 J
=418.4 J
=2,092 J
=4,184 J

Need a different value? .

Convert the other way
Joules to Calories

How to convert calories to joules

To convert calories to joules, multiply the value by 4.184.

Formula
J = cal × 4.184

For example:

  • →5 cal = 20.92 J
  • →100 cal = 418.4 J

Quick reference

  • ▸1 cal = 4.184 J
  • ▸1 J = 0.239006 cal

When you need to convert cal to J

  • ·Nutrition — converting calories to kilojoules on food labels.
  • ·Electricity bills — kWh consumption.
  • ·Heating — BTU ratings for furnaces.
  • ·Exercise — calorie burn during workouts.
  • ·Science — chemistry and physics problems.

Frequently asked

How many joules are in 1 calorie?
One calorie equals 4.184 joules.
How do I convert cal to J in my head?
Multiply the value in calories by 4.184 to get joules.
What is the formula for calories to joules?
J = cal × 4.184.
What is the reverse — how many calories in 1 joule?
One joule equals 0.239006 calories.

Related conversions

Joules to Calories
1 J = 0.239006 cal
Calories to Kilojoules
1 cal = 0.004184 kJ
Calories to Kilocalories
1 cal = 0.001 kcal
Calories to Watt-hours
1 cal = 0.00116222 Wh
Kilojoules to Joules
1 kJ = 1,000 J
Kilocalories to Joules
1 kcal = 4,184 J
Watt-hours to Joules
1 Wh = 3,600 J
Kilowatt-hours to Joules
1 kWh = 3,600,000 J
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