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kcal to kJ

1 kcal = 4.184 kJ

Food labels carry both, and the calorie people talk about in diet is the kilocalorie on the packet — so a 500 kcal meal is 2,092 kJ. Australian and EU labelling leads with kilojoules, US labelling with calories.

4.184

1 Kilocalorie = 4.184 Kilojoule

kcal to kJ conversion table

kcalkJ
100418.4
200836.8
2501046
5002092
10004184
15006276
20008368
250010460

kcal to kJ — frequently asked

What is 1 kcal in kJ?
1 kcal = 4.184 kJ.
What is 100 kcal in kJ?
100 kcal = 418.4 kJ.
What is 200 kcal in kJ?
200 kcal = 836.8 kJ.
What is 250 kcal in kJ?
250 kcal = 1046 kJ.
What is 500 kcal in kJ?
500 kcal = 2092 kJ.
What is 1000 kcal in kJ?
1000 kcal = 4184 kJ.

Other energy conversions

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A unit converter changes a measurement from one unit to another. Pick a category — length, weight, temperature, data, area, speed, and 75+ more, including engineering and scientific units like pressure, torque, and viscosity — enter a value, and get an accurate conversion instantly. It runs in your browser with no sign-up and nothing to install.

Frequently asked questions

How many unit categories are supported?
Over 75, from everyday units (length, mass, temperature, volume, area, speed, data storage) to technical and scientific ones (energy, pressure, torque, viscosity, molar concentration, luminance, and more).
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Yes. Alongside common units it covers engineering and scientific categories — force, pressure, torque, thermal, flow, radiology, and CSS/typography units — with precise conversion factors.
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Yes. Conversions use standard factors and precise formulas, including non-linear ones like temperature, so results are exact.
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