Density Converters
Convert between density units including kg/m³, g/cm³, g/mL, kg/L, lb/ft³, lb/in³, oz/in³, and slug/ft³ using exact multiplicative relationships.
Explanation
Density is mass per unit volume. This hub normalizes all factors through kilograms per cubic meter (kg/m³): 1 g/cm³ = 1 g/mL exactly, and 1 kg/L = 1000 kg/m³ exactly. Imperial and slug-based units are derived from fixed mass and length definitions, so conversions remain stable and reversible. For clarity, conversions are grouped into metric-only, cross-system, and imperial-only pairs.
Density pages are organized by conversion direction so mirror leaves remain aligned and comparable.
Open a family hub to reach leaf pages with direct answers, calculator output, and reverse links built on the same constants.
Frequently Asked Questions
What is the SI unit of density?
The SI unit is kilograms per cubic meter (kg/m³).
Are g/cm³ and g/mL the same?
Yes. They are exactly equal.
How does kg/L relate to kg/m³?
Exactly: 1 kg/L = 1000 kg/m³.
Why include slug/ft³?
It is used in some US engineering contexts and still converts through fixed unit definitions.
Are there offsets in density conversions?
No. Density conversions are purely multiplicative with no additive offsets.
How do I switch direction?
Use the switch button to navigate directly to the mirror page for the reverse conversion.