The density, or more precisely, the volumetric mass density of ruthenium is 12370 kg/m³. This means that the mass of 1 m³ ruthenium is 12370 kg.
The weight (on earth) of 1 m³ ruthenium is 121349,7 N or 121,3497 kN.
Conversion Chart Metric System:
| Kilogram per cubic meter | 12370 | kg/m³ |
| Tonne per cubic meter | 12,37 | t/m³ |
| Gram per cubic meter | 12370000 | g/m³ |
| Milligram per cubic meter | 12370000000 | mg/m³ |
| Kilogram per cubic centimeter | 0,01237 | kg/cm³ |
| Gram per cubic centimeter | 12,37 | g/cm³ |
| Milligram per cubic centimeter | 12370 | mg/cm³ |
| Kilogram per litre | 12,37 | kg/L |
| Gram per litre | 12370 | g/L |
| Milligram per litre | 12370000 | mg/L |
| Kilogram per millilitre | 0,01237 | kg/mL |
| Gram per millilitre | 12,37 | g/mL |
| Milligram per millilitre | 12370 | mg/mL |
Conversion Chart British and U.S.:
| Pound per cubic yard | 20855,82 | lb/yd³ |
| Pound per cubic foot | 772,2591 | lb/ft³ |
| Pound per cubic inch | 0,4469281 | lb/in³ |
| Pound per U.S. gallon | 103,22765 | lb/gal |
| Pound per British gallon | 123,9474 | |
| Pound per U.S. bushel | 961,0253 | |
| Ounce per cubic yard | 333618,9 | oz/yd³ |
| Ounce per cubic foot | 12355,156 | oz/ft³ |
| Ounce per cubic inch | 7,14986 | oz/in³ |
| Ounce per U.S. gallon | 1651,395 | oz/gal |
| Ounce per British gallon | 1984,148 | |
| Ounce per U.S. bushel | 15375,91 |
British Gravitational and English Engineering Units:
| Slug per cubic yard | 648,0643 | slug/yd³ |
| Slug per cubic foot | 23,9978 | slug/ft³ |
| Slug per cubic inch | 0,01389151 | slug/in³ |