1 kJ = 0.2390057361 kcal
1 kcal = 4.184 kJ
Kilojoule(kj)
Definition:
A kilojoule is an SI unit of energy equal to 1,000 joules. It represents the amount of energy required to apply a force of one newton across a distance of one meter.
Origin:
The prefix kilo means 1,000, so one kilojoule equals 1,000 joules. This system of prefixes is used to measure multiples and submultiples of units.
Current Use:
Kilojoules are widely used ...
1 kJ = 0.2390057361 kcal
1 kcal = 4.184 kJ
Kilojoule(kj)
Definition:
A kilojoule is an SI unit of energy equal to 1,000 joules. It represents the amount of energy required to apply a force of one newton across a distance of one meter.
Origin:
The prefix kilo means 1,000, so one kilojoule equals 1,000 joules. This system of prefixes is used to measure multiples and submultiples of units.
Current Use:
Kilojoules are widely used in countries that follow the SI system. On food labels, energy is often shown in kilojoules, sometimes alongside kilocalories. In the U.S., however, only kilocalories (commonly called calories) are typically displayed. Beyond food, kilojoules are used in scientific contexts around the world.
Kilocalorie (kcal)
Definition:
A kilocalorie (kcal) is a unit of energy equal to 1,000 small calories. One kilocalorie equals 4.1868 kilojoules. In nutrition, kilocalories are often simply referred to as calories.
Origin:
The word calorie comes from the Latin calor, meaning heat. It was first introduced as a unit of heat energy in 1824 by Nicholas Clément. In 1887, Wilbur Olin Atwater introduced it in the U.S. as part of dietary energy measurement.
Current Use:
Kilocalories are widely used in countries that have not fully adopted the SI system. On food labels, energy values are shown in kilocalories (calories), helping people measure daily intake. For example, a food item of 480 calories contains more energy than one with 30 calories.
Conversion Formula
1 kJ = 0.2390057361 kcal
1 kcal = 4.184 kJ
Example: Convert 15 kJ to kcal: 15 × 0.2390057361 = 3.585 kcal
Kilojoule to Kilocalorie Conversion Table
Kilojoule (kJ) Kilocalorie (kcal)
0.01 kJ 0.00239 kcal
0.1 kJ 0.02390 kcal
1 kJ 0.23901 kcal
2 kJ 0.47801 kcal
3 kJ 0.71702 kcal
5 kJ 1.19503 kcal
10 kJ 2.39006 kcal
20 kJ 4.78011 kcal
50 kJ 11.95029 kcal
100 kJ 23.90057 kcal
1000 kJ 239.00574 kcal
