Convert Kilocalories to Kilojoules
1 kcal = 4.184 kJ
Conversion Table
| kilocalories (kcal) | kilojoules (kJ) |
|---|---|
| 0.5 | 2.092 |
| 1 | 4.184 |
| 2 | 8.368 |
| 5 | 20.92 |
| 10 | 41.84 |
| 25 | 104.6 |
| 50 | 209.2 |
| 100 | 418.4 |
| 250 | 1046 |
| 500 | 2092 |
| 1000 | 4184 |
How to Convert kilocalories to kilojoules
To convert kilocalories to kilojoules, multiply the value by the conversion factor:
For example: 10 kcal = 41.84 kJ
Related Converters
About kilocalories and kilojoules
The Conversion Formula
To convert kilocalories to kilojoules, multiply the value by the conversion factor: 1 kcal = 4.184 kJ. For a worked example, suppose you need to convert 25 kcal to kilojoules: 25 × 4.184 = 104.6 kJ. To convert in the opposite direction, divide by 4.184, or equivalently multiply by 0.239006.
About kilocalories
The kilocalorie (kcal) is what we colloquially call a 'Calorie' (capital C) on food labels in the US. It equals 1,000 small chemistry calories. It represents the energy required to heat 1 kilogram of water by 1°C. Confusion between calories and Calories is one of the most common unit errors in the world! kilocalories are commonly used in US Food labels, Diet apps, Fitness trackers, and Nutrition science, Body metabolic rate.
An apple contains about 95 kilocalories (Calories).
About kilojoules
The kilojoule (kJ) is the standard unit for food energy in most of the world (Australia, Europe, etc.), replacing the Calorie. One food Calorie (kcal) is approximately 4.2 kJ. It provides a more precise measure of energy intake than the large Calorie. kilojoules are commonly used in Food labels (Global), Exercise machines, Diet planning, and Thermodynamics, Metabolic rate tracking.
A slice of bread has about 300-400 kJ.
When Would You Convert kilocalories to kilojoules?
Converting between kilocalories and kilojoules is one of the most common energy conversions. You might need this conversion when working with international specifications, following instructions written for a different measurement system, or comparing values across different standards. Having the conversion factor (1 kcal = 4.184 kJ) memorized or bookmarked can save time in professional and everyday contexts alike.