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Kilocalories to Joules converter

Convert kcal to J instantly. Type any value and get the result in joules. 1 kcal = 4,184 J.

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Energy›kcal → J
From
To
result below ↓
1 kcal=
4,184J
formula1 kcal = 4,184 J

Common kilocalories → joules

=4,184 J
=8,368 J
=20,920 J
=41,840 J
=83,680 J
=209,200 J
=418,400 J
=2,092,000 J
=4,184,000 J

Need a different value? .

Convert the other way
Joules to Kilocalories

How to convert kilocalories to joules

To convert kilocalories to joules, multiply the value by 4,184.

Formula
J = kcal × 4,184

For example:

  • →5 kcal = 20,920 J
  • →100 kcal = 418,400 J

Quick reference

  • ▸1 kcal = 4,184 J
  • ▸1 J = 0.000239006 kcal

When you need to convert kcal 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 kilocalorie?
One kilocalorie equals 4,184 joules.
How do I convert kcal to J in my head?
Multiply the value in kilocalories by 4,184 to get joules.
What is the formula for kilocalories to joules?
J = kcal × 4,184.
What is the reverse — how many kilocalories in 1 joule?
One joule equals 0.000239006 kilocalories.

Related conversions

Joules to Kilocalories
1 J = 0.000239006 kcal
Kilocalories to Kilojoules
1 kcal = 4.184 kJ
Kilocalories to Calories
1 kcal = 1,000 cal
Kilocalories to Watt-hours
1 kcal = 1.16222 Wh
Kilojoules to Joules
1 kJ = 1,000 J
Calories to Joules
1 cal = 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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