Density Converter
Convert between 8 units of density — kg/m³, g/cm³, g/mL, kg/L, g/L, lb/ft³, lb/in³, and slug/ft³. Water at 4°C has a density of exactly 1,000 kg/m³ (1 g/cm³) — the reference for specific gravity. Gold (19,320 kg/m³) is 19× denser than water; air at sea level is only 1.225 kg/m³. Used in chemistry, geology, shipbuilding and food science.
About the Density Converter
Density is mass per unit volume and is a key intrinsic property used to identify materials and understand buoyancy (Archimedes' principle). Pure water at 4 °C has a density of exactly 1,000 kg/m³ (1 g/cm³), which serves as a reference point for the concept of specific gravity. Density varies with temperature and pressure, especially in gases.
- ›Osmium is the densest naturally occurring element at 22,590 kg/m³
- ›The density of air at sea level is approximately 1.225 kg/m³
- ›Gold (19,320 kg/m³) is nearly 20× denser than water
- ›Ice is less dense than liquid water (917 vs 1,000 kg/m³) — which is why ice floats
Frequently Asked Questions
What units does the Density Converter support?
The Density Converter supports multiple units with instant conversion. Convert between 8 units of density — kg/m³, g/cm³, g/mL, kg/L, g/L, lb/ft³, lb/in³, and slug/ft³. Water at 4°C has a density of exactly 1,000 kg/m³ (1 g/cm³) — the reference for specific gravity. Gold (19,320 kg/m³) is 19× denser than water; air at sea level is only 1.225 kg/m³. Used in chemistry, geology, shipbuilding and food science. All results use SI-validated constants accurate to 8 significant figures.
Is this Density Converter free?
Yes — completely free. No registration, no limits. Works on all devices including mobile.
How accurate is this converter?
Accurate to 8 significant figures using precise mathematical constants validated against international SI standards (NIST and ISO 80000).