Reference table
Density: kg/m³, g/cm³ and lb/ft³
Density is mass per volume. Engineering uses kg/m³, laboratory values often g/cm³, and imperial tables lb/ft³. The table shows the same density in every unit.
| kg/m³ | g/cm³ | g/l | lb/ft³ |
|---|---|---|---|
| 1 | 0.001 g/cm³ | 1 g/l | 0.06242796 lb/ft³ |
| 10 | 0.01 g/cm³ | 10 g/l | 0.62427961 lb/ft³ |
| 100 | 0.1 g/cm³ | 100 g/l | 6.24279606 lb/ft³ |
| 500 | 0.5 g/cm³ | 500 g/l | 31.21398029 lb/ft³ |
| 1,000 | 1 g/cm³ | 1,000 g/l | 62.42796058 lb/ft³ |
| 2,000 | 2 g/cm³ | 2,000 g/l | 124.85592115 lb/ft³ |
| 5,000 | 5 g/cm³ | 5,000 g/l | 312.13980288 lb/ft³ |
| 10,000 | 10 g/cm³ | 10,000 g/l | 624.27960576 lb/ft³ |
1 g/cm³ = 1000 kg/m³, and 1 g/l = 1 kg/m³. The kg/m³ and g/l columns are therefore identical in every row — that is not an error but the definition: one gram per litre and one kilogram per cubic metre are the same value. g/cm³ and g/l differ by a factor of 1000, even though both are built on grams. Water is about 1000 kg/m³ at 4 °C and air about 1.2 kg/m³ under standard conditions.