Gram to Joule
Convert Gram to Joule instantly. Free online scientific unit converter with exact formula, conversion table and FAQ.
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Formula
joule = gram × 0.001
gram = joule × 1000
Conversion table
| 1 g | 0.001 J |
| 5 g | 0.005 J |
| 10 g | 0.01 J |
| 20 g | 0.02 J |
| 50 g | 0.05 J |
| 100 g | 0.1 J |
| 500 g | 0.5 J |
| 1000 g | 1 J |
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Frequently asked questions
What is the source unit in this conversion?
The source unit is the gram (g). A gram is one thousandth of a kilogram.
What is the destination unit in this conversion?
The destination unit is the joule (J). The joule is the SI derived unit of energy.
How do I convert gram to joule?
Multiply the gram value by 0.001. For example, 10 g × 0.001 = 0.01 J.
Is the gram to joule conversion exact?
Yes. The relationship between these units is a fixed mathematical or SI-defined ratio, so the conversion factor is exact rather than a measured approximation.
Where is this conversion commonly used?
It's used whenever a value expressed in gram needs to be compared with, or reported in, joule, such as in engineering, scientific, or laboratory calculations.
Can I convert joule back to gram?
Yes. Multiply the joule value by 1000 to get gram.
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About this conversion
This page converts gram (g) to joule (J) within the scientific units converter.
A gram is one thousandth of a kilogram.
The joule is the SI derived unit of energy.
The formula is joule = gram × 0.001, based on each unit's fixed relationship to the scientific converter's reference units.
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 gram values already converted to joule.