Specific Gravity Calculator
Find specific gravity from density relative to water.
Density relative to water
Specific gravity compares a material’s density to water’s, giving a unitless number that instantly tells you whether it floats or sinks. Water itself is exactly 1.
A substance with a density of 2.7 grams per cubic centimetre — like aluminium — has a specific gravity of 2.7 and sinks. Enter a density to get its specific gravity.
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The calculation runs in your browser, so nothing you enter is uploaded.
Frequently Asked Questions
What is specific gravity?
The ratio of a substance’s density to the density of water. Above 1 sinks in water; below 1 floats.
What units?
Enter density in grams per cubic centimetre, where water is 1. The result is unitless.
Why does it matter?
It predicts floating and sinking, and is used to identify materials and check solutions.
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