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Calories to Joules Converter

Convert kilocalories (food calories) (kcal) to kilojoules (kJ) instantly. Includes the exact conversion factor, formula and a quick reference table.

Enter values

Results update as you type.

Result

Kilojoules

2,092 kJ

Joules
2,092,000 J
Megajoules
2.092 MJ
Calories
500,000 cal
Watt-hours
581.1111 Wh
Kilowatt-hours
0.581111 kWh
British thermal units
1,982.83 BTU
Step-by-stepShow
  1. 500 kcal × 4.184 = 2,092 kJ

Kilocalories (food Calories) to Kilojoules conversion table

Kilocalories (food Calories) (kcal)Kilojoules (kJ)
0.10.4184
0.52.092
14.184
28.368
520.92
1041.84
2083.68
50209.2
100418.4
5002,092
1,0004,184

About the Calories to Joules Converter

Convert kilocalories (food calories) (kcal) to kilojoules (kJ) instantly. Includes the exact conversion factor, formula and a quick reference table.

Also known as: kcal to kJ, Kilocalories (food Calories) to Kilojoules, convert Kilocalories (food Calories) to Kilojoules, kcal to kj, kcal to kj, food calories to kilojoules.

How to use this calculator

  1. Enter value in kilocalories (food calories).
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Open “Step-by-step” to see how the answer was worked out.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

kJ = kcal × 4.184

Worked example

Using the values pre-filled in the calculator above:

  • Value in kilocalories (food calories) = 500 kcal

the calculator returns:

  • Kilojoules: 2,092 kJ
  • Joules: 2,092,000 J
  • Megajoules: 2.092 MJ
  • Calories: 500,000 cal

Working

  1. 500 kcal × 4.184 = 2,092 kJ

Frequently asked questions

How many kilojoules are in one kilocalories (food calories)?

1 kcal equals 4.184 kJ.

Is a food Calorie the same as a calorie?

A food Calorie with a capital C is a kilocalorie — 1,000 small calories, or 4.184 kJ.