Calorie to Gigajoule
Convert Calorie to Gigajoule instantly. Free online engineering unit converter with exact formula, conversion table and FAQ.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Use the converter to see the formula.
Results update instantly for Calorie to Gigajoule conversions.
Reserved above the conversion cards and below the converter.
Formula
GJ = cal × 4.184e-09
cal = GJ × 2.39006e+08
Conversion table
| 1 cal | 4.184e-09 GJ |
| 5 cal | 2.092e-08 GJ |
| 10 cal | 4.184e-08 GJ |
| 20 cal | 8.368e-08 GJ |
| 50 cal | 2.092e-07 GJ |
| 100 cal | 4.184e-07 GJ |
| 500 cal | 2.092e-06 GJ |
| 1000 cal | 4.184e-06 GJ |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
What is the source unit in this conversion?
The source unit is the Calorie (cal). A thermochemical calorie is 4.184 joules.
What is the destination unit in this conversion?
The destination unit is the Gigajoule (GJ). Gigajoule is 1000000000 joule units.
How do I convert Calorie to Gigajoule?
Multiply the Calorie value by 4.184e-09. For example, 10 cal × 4.184e-09 = 4.184e-08 GJ.
Is the Calorie to Gigajoule conversion exact?
Yes. Both units belong to the same engineering measurement family (energy), so the ratio between them is a fixed, defined value rather than a measured approximation.
Where is this conversion commonly used?
It's used whenever a value expressed in Calorie needs to be compared with, or reported in, Gigajoule, such as in engineering, scientific, or industrial calculations.
Can I convert Gigajoule back to Calorie?
Yes. Multiply the Gigajoule value by 2.39006e+08 to get Calorie.
Reserved between the FAQ and the article so the page stays balanced.
About this conversion
This page converts Calorie (cal) to Gigajoule (GJ) within the engineering converter.
A thermochemical calorie is 4.184 joules. Gigajoule is 1000000000 joule units.
The formula is GJ = cal × 4.184e-09, based on each unit's fixed relationship to the energy base unit.
The conversion is exact, since it relies on a fixed numerical ratio between the two units rather than a measured or approximate value.
Use the calculator above for instant results, or the table below for common Calorie values already converted to Gigajoule.