Convert Kilocalorie to Kilojoule

One kcal equals 4.184 kJ. This converter allows you to easily convert between Kilocalorie and Kilojoule in real time.

Formula

kcal × 4.184 = kJ

Example: 1 kcal = 4.184 kJ

What is Kilocalorie?

The kilocalorie equals 1,000 thermochemical calories and is the standard unit for food energy labeling in Japan, the United States, and many other countries. It is often written as "Cal" (with a capital C) or simply called a "Calorie" on food packages. A bowl of rice (150 grams) contains about 235 kcal, a slice of bread about 160 kcal, and 30 minutes of walking burns roughly 100 kcal.

What is Kilojoule?

The kilojoule equals 1,000 joules and is used for food energy labeling in Australia, New Zealand, and many other countries. A typical adult requires about 8,400 kJ (2,000 kcal) of food energy per day. In chemistry, enthalpy changes are commonly expressed in kJ per mole, and the heat of vaporization of water is approximately 2,257 kJ per kilogram.