Density Converter
Convert between kg/m³, g/cm³, lb/ft³, and lb/gal instantly.
Type in any field and the others update automatically.
Type in any field — the others update instantly.
Density Conversion uses kg/m³ as the base unit.
Key relationships:
1 g/cm³ = 1,000 kg/m³1 lb/ft³ = 16.0185 kg/m³1 lb/gal (US) = 119.826 kg/m³
Common material densities:
- Air (sea level): 1.225 kg/m³ = 0.001225 g/cm³
- Water (4°C): 1,000 kg/m³ = 1.000 g/cm³ = 62.43 lb/ft³ = 8.345 lb/gal
- Concrete: 2,400 kg/m³ = 2.4 g/cm³ = 149.8 lb/ft³
- Steel: 7,850 kg/m³ = 7.85 g/cm³ = 490 lb/ft³
- Aluminum: 2,700 kg/m³ = 2.7 g/cm³ = 168.6 lb/ft³
- Gold: 19,300 kg/m³ = 19.3 g/cm³
Specific gravity is density relative to water: SG = density / 1000 kg/m³