Density is commonly defined as the amount of mass or objects contained within a certain volume.
Density = Mass / Volume
Standard units = kilograms per square meter (kg/m
2).
The symbol of density is ρ (the Greek letter rho).
| | lb per in3 | lb per ft3 | slug per ft3 | g per cm3 | kg per m3 |
| 1 lb/in3 | 1 | 1728 | 53.71 | 27.68 | 2.768 * 104 |
| 1 lb/ft3 | 5.787 * 10-4 | 1 | 3.108 * 10-2 | 1.602 * 10-2 | 16.02 |
| 1 slug/ft3 | 1.862 * 10-2 | 32.17 | 1 | 0.5154 | 515.4 |
| 1 g/cm3 | 3.613 * 10-2 | 62.43 | 1.940 | 1 | 1000 |
| 1 kg/m3 | 3.613 * 10-5 | 6.243 * 10-2 | 1.940 * 10-3 | 0.001 | 1 |
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Kirt Blattenberger, BSEE, UVM 1989