Density Converter (General)

The Density Converter is a universal tool for converting between all major units of density. Density — the mass per unit volume of a substance — is a fundamental physical property used in engineering, materials science, chemistry, geology, fluid mechanics, and manufacturing.

The SI unit of density is kilograms per cubic meter (kg/m³). Water at 4°C has a density of 1000 kg/m³ (or equivalently, 1 g/cm³ or 1 kg/L), which serves as a convenient reference point. Materials denser than water (like steel at 7,800 kg/m³ or gold at 19,300 kg/m³) sink, while less dense materials (like wood at 400-900 kg/m³ or oil at 800-950 kg/m³) float.

In the United States, density is often expressed in pounds per cubic foot (lb/ft³) for building materials and pounds per gallon (lb/gal) for liquids. Converting between these systems is essential for international trade, engineering specifications, and scientific research. Our converter supports 7 common density units including the specialized ounces per cubic inch used in precision manufacturing.

Density depends on temperature and pressure. For gases, density changes significantly with both; for liquids, temperature has a moderate effect; for solids, the effect is minimal under normal conditions. All conversions here apply the standard conversion factors between units, which are independent of temperature and pressure.