Density Converter

Density: convert between kilograms per cubic meter and pounds per cubic foot using exact SI definitions.

Works for any combination of the units above -- every value converts through the same verified base-unit math used on the individual pages.

How Density Units Relate

Density units combine a mass unit with a volume unit. Because volume scales as the cube of length, converting between metric and US customary density units means combining the mass ratio (pound to kilogram) with the length ratio cubed (foot to meter), which is why the conversion factor looks less intuitive than a simple length or weight conversion.

All Density Converters

Each of these has its own page with the exact formula, a reference table, and answers to common questions.

Kilogram per Cubic Meter to Pound per Cubic Foot Pound per Cubic Foot to Kilogram per Cubic Meter

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