Convert Kilocalorie to Gigajoule
Convert kilocalories to gigajoules by entering a value below.
How to Convert Kilocalories to Gigajoules
The kilocalorie and gigajoule are both units of energy. 1 gigajoule equals 239005.73614 kilocalories. This means to convert kilocalories to gigajoules, you divide by 239005.73614.
Formula
Step-by-Step Example
Convert 5 kcal to gigajoules:
We need to convert kilocalories to gigajoules
Since 1 GJ = 239005.73614 kcal, divide by 239005.73614
5 ÷ 239005.73614 = 2.092e-5
5 kcal = 2.092e-5 GJ
Kilocalorie to Gigajoule Conversion Table
Quick reference table for common kilocalorie to gigajoule conversions. Click any value for detailed calculation.
| Kilocalories (kcal) | Gigajoules (GJ) |
|---|---|
| 0.1 kcal | 4.184e-7 GJ |
| 0.5 kcal | 2.092e-6 GJ |
| 1 kcal | 4.184e-6 GJ |
| 2 kcal | 8.368e-6 GJ |
| 5 kcal | 2.092e-5 GJ |
| 10 kcal | 4.184e-5 GJ |
| 25 kcal | 0.0001046 GJ |
| 50 kcal | 0.0002092 GJ |
| 100 kcal | 0.0004184 GJ |
About These Units
Kilocalorie (kcal)
A kilocalorie (kcal), often written as "Calorie" (capital C) on food labels, equals 1,000 small calories or 4,184 joules. Kilocalories measure food energy. Average adult needs 2,000-2,500 kcal daily. Walking one mile burns about 80-100 kcal.
Gigajoule (GJ)
A gigajoule (GJ) equals 1 billion joules or approximately 277.8 kilowatt-hours. Gigajoules measure natural gas billing, industrial energy use, and building energy consumption. One GJ equals about 26.8 cubic meters of natural gas.
Frequently Asked Questions
How do I convert kilocalories to gigajoules?
To convert kilocalories to gigajoules, divide the value by 239005.73614. For example, 10 kcal = 4.184e-5 GJ.
How many gigajoules are in 1 kilocalorie?
1 kilocalorie equals 4.184e-6 gigajoules.
What is the formula for kilocalories to gigajoules?
The formula is: GJ = kcal ÷ 239005.73614.