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Specific Gravity Calculator


Specific Gravity Formula:
Using the air weight and water weight of the stone, find the specific gravity using the following formula:
AIR WEIGHT / (AIR WEIGHT - WATER WEIGHT)

For example if the air weight is 1.50 carats and the water weight is 1.12 carats:
1.50/(1.50-1.12) = The specific gravity equals 3.95

Specific Gravity Calculator
Enter Air Weight    Enter Water Weight    SG Results    
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Compare your results with this printable reference chart:
Compare your results with this printable reference chart: Specific Gravity Chart
Or plug it into our handy dandy Gem Wizard.