Density Calculator
Calculate density (mass / volume), or solve for any missing variable. Includes common density reference values.
Inputs
Density
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In kg/m³
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In lb/ft³
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Comparison
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Mass input
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About Density Calculator
Common densities
Water 1.00. Ice 0.92. Aluminum 2.70. Steel 7.85. Lead 11.34. Gold 19.32. Air at STP 0.001225 — about 1000× less dense than water.
Why ice floats
Water expands as it freezes (one of very few substances that does). Ice is ~9% less dense than liquid water, so it floats. This is why life can survive in lakes that freeze over.
Specific gravity
Density relative to water. Specific gravity 0.85 means 15% less dense than water. Used in geology (rocks), brewing (wort), and chemistry.