What is the formula for density?

Density is calculated using the formula: ρ = m / V, where ρ (rho) is density, m is mass, and V is volume. The standard SI unit is kilograms per cubic meter (kg/m³).

What are the common units for density?

Common density units include kg/m³ (kilograms per cubic meter), g/cm³ (grams per cubic centimeter), and lb/ft³ (pounds per cubic foot). Water has a density of approximately 1000 kg/m³ or 1 g/cm³.

What is the density of water?

The density of water at 4°C is approximately 1000 kg/m³, 1 g/cm³, or 62.4 lb/ft³. This is why objects with density less than water float, while those with higher density sink.

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Formula: ρ = m / V

Common Substance Densities

Substance	Density (kg/m³)
Air (at sea level)	1.225
Water (4°C)	1,000
Ice	917
Aluminum	2,700
Iron	7,874
Copper	8,960
Silver	10,490
Lead	11,340
Gold	19,320
Platinum	21,450
Oak Wood	600–900
Concrete	2,300
Glass	2,500
Petrol (Gasoline)	710–770
Mercury	13,546
Ethanol	789
Olive Oil	920
Helium (gas)	0.178
Carbon Dioxide	1.977
Steel	7,850