The density, or more precisely, the volumetric mass density of rubidium is 1532 kg/m³. This means that the mass of 1 m³ rubidium is 1532 kg.
The weight (on earth) of 1 m³ rubidium is 15028,92 N or 15,02892 kN.
Conversion Chart Metric System:
| Kilogram per cubic meter | 1532 | kg/m³ |
| Tonne per cubic meter | 1,532 | t/m³ |
| Gram per cubic meter | 1532000 | g/m³ |
| Milligram per cubic meter | 1532000000 | mg/m³ |
| Kilogram per cubic centimeter | 0,001532 | kg/cm³ |
| Gram per cubic centimeter | 1,532 | g/cm³ |
| Milligram per cubic centimeter | 1532 | mg/cm³ |
| Kilogram per litre | 1,532 | kg/L |
| Gram per litre | 1532 | g/L |
| Milligram per litre | 1532000 | mg/L |
| Kilogram per millilitre | 0,001532 | kg/mL |
| Gram per millilitre | 1,532 | g/mL |
| Milligram per millilitre | 1532 | mg/mL |
Conversion Chart British and U.S.:
| Pound per cubic yard | 2582,952 | lb/yd³ |
| Pound per cubic foot | 95,64276 | lb/ft³ |
| Pound per cubic inch | 0,05535116 | lb/in³ |
| Pound per U.S. gallon | 12,78454 | lb/gal |
| Pound per British gallon | 15,35064 | |
| Pound per U.S. bushel | 119,02108 | |
| Ounce per cubic yard | 41318,04 | oz/yd³ |
| Ounce per cubic foot | 1530,1616 | oz/ft³ |
| Ounce per cubic inch | 0,885496 | oz/in³ |
| Ounce per U.S. gallon | 204,522 | oz/gal |
| Ounce per British gallon | 245,7328 | |
| Ounce per U.S. bushel | 1904,276 |
British Gravitational and English Engineering Units:
| Slug per cubic yard | 80,26148 | slug/yd³ |
| Slug per cubic foot | 2,97208 | slug/ft³ |
| Slug per cubic inch | 0,001720436 | slug/in³ |