Use density = mass ÷ volume (ρ = m/V). Rearrange the same relationship to find mass with m = ρV or volume with V = m/ρ. Match the units first, then substitute the two values you know.
Divide mass by volume
Density = mass ÷ volume: ρ = m/V. For example, 600 g ÷ 200 cm³ = 3 g/cm³. Both measurements must describe the same amount of material. As a unit check, 1 kg occupying 1 L gives 1 kg/L, exactly 1000 kg/m³ and 1 g/cm³.
Multiply density by volume
Mass = density × volume: m = ρV. For example, 2.7 g/cm³ × 50 cm³ = 135 g. The cm³ units cancel and leave grams. If the density and volume use different volume units, convert them to a coherent pair before multiplying.
Divide mass by density
Volume = mass ÷ density: V = m/ρ. For example, 500 g ÷ 2.5 g/cm³ = 200 cm³. The gram units cancel and leave cubic centimetres. Density must be greater than zero; DensityCalc then converts the result with exact rational factors into cubic metres, litres, cubic centimetres, or cubic feet.