The density, or more precisely, the volumetric mass density of platinum is 21450 kg/m³. This means that the mass of 1 m³ platinum is 21450 kg.
The weight (on earth) of 1 m³ platinum is 210424,5 N or 210,4245 kN.
Conversion Chart Metric System:
| Kilogram per cubic meter | 21450 | kg/m³ |
| Tonne per cubic meter | 21,45 | t/m³ |
| Gram per cubic meter | 21450000 | g/m³ |
| Milligram per cubic meter | 21450000000 | mg/m³ |
| Kilogram per cubic centimeter | 0,02145 | kg/cm³ |
| Gram per cubic centimeter | 21,45 | g/cm³ |
| Milligram per cubic centimeter | 21450 | mg/cm³ |
| Kilogram per litre | 21,45 | kg/L |
| Gram per litre | 21450 | g/L |
| Milligram per litre | 21450000 | mg/L |
| Kilogram per millilitre | 0,02145 | kg/mL |
| Gram per millilitre | 21,45 | g/mL |
| Milligram per millilitre | 21450 | mg/mL |
Conversion Chart British and U.S.:
| Pound per cubic yard | 36164,7 | lb/yd³ |
| Pound per cubic foot | 1339,1235 | lb/ft³ |
| Pound per cubic inch | 0,7749885 | lb/in³ |
| Pound per U.S. gallon | 179,00025 | lb/gal |
| Pound per British gallon | 214,929 | |
| Pound per U.S. bushel | 1666,4505 | |
| Ounce per cubic yard | 578506,5 | oz/yd³ |
| Ounce per cubic foot | 21424,26 | oz/ft³ |
| Ounce per cubic inch | 12,3981 | oz/in³ |
| Ounce per U.S. gallon | 2863,575 | oz/gal |
| Ounce per British gallon | 3440,58 | |
| Ounce per U.S. bushel | 26662,35 |
British Gravitational and English Engineering Units:
| Slug per cubic yard | 1123,7655 | slug/yd³ |
| Slug per cubic foot | 41,613 | slug/ft³ |
| Slug per cubic inch | 0,02408835 | slug/in³ |