Convert Calories (cal) to Kilojoules (kJ)
Enter a value below to convert Calories (cal) to Kilojoules (kJ).
Conversion:
1 Calories (cal) = 0.004184 Kilojoules (kJ)
How to Convert Calories (cal) to Kilojoules (kJ)
1 cal = 0.004184 kj
1 kj = 239.00573614 cal
Example: convert 15 Calories (cal) to Kilojoules (kJ):
25 cal = 0.1046 kj
Calories (cal) to Kilojoules (kJ) Conversion Table
| Calories (cal) | Kilojoules (kJ) |
|---|---|
| 0.01 cal | 0.00004184 kj |
| 0.1 cal | 0.0004184 kj |
| 1 cal | 0.004184 kj |
| 2 cal | 0.008368 kj |
| 3 cal | 0.012552 kj |
| 5 cal | 0.02092 kj |
| 10 cal | 0.04184 kj |
| 20 cal | 0.08368 kj |
| 50 cal | 0.2092 kj |
| 100 cal | 0.4184 kj |
| 1000 cal | 4.184 kj |
Calories (cal)
Definition
A calorie (cal), also known as a small calorie or gram calorie, is defined as the amount of heat energy needed to raise the temperature of one gram of water by one degree Celsius. It equals approximately 4.184 joules.
History
The calorie was first defined by French chemist Nicolas Clément in 1824. It was widely used in chemistry and physiology before the joule became the official SI unit of energy.
Current use
Small calories are used in chemistry and physics for heat measurements. In everyday language, 'calorie' often refers to the kilocalorie (kcal) when discussing food energy.
Kilojoules (kJ)
Definition
A kilojoule (kJ) is a unit of energy equal to 1,000 joules. It is commonly used for expressing larger quantities of energy in nutritional contexts and engineering.
History
The kilojoule naturally derives from the joule with the SI kilo- prefix. It gained widespread use in the 20th century, particularly in countries adopting the metric system for food energy labeling.
Current use
Kilojoules are the primary energy unit on food labels in Australia, New Zealand, and many European countries. They are also used in heating, ventilation, and chemical energy calculations.