The density, or more precisely, the volumetric mass density of praseodymium is 6640 kg/m³. This means that the mass of 1 m³ praseodymium is 6640 kg.
The weight (on earth) of 1 m³ praseodymium is 65138,4 N or 65,1384 kN.
Conversion Chart Metric System:
| Kilogram per cubic meter | 6640 | kg/m³ |
| Tonne per cubic meter | 6,64 | t/m³ |
| Gram per cubic meter | 6640000 | g/m³ |
| Milligram per cubic meter | 6640000000 | mg/m³ |
| Kilogram per cubic centimeter | 0,00664 | kg/cm³ |
| Gram per cubic centimeter | 6,64 | g/cm³ |
| Milligram per cubic centimeter | 6640 | mg/cm³ |
| Kilogram per litre | 6,64 | kg/L |
| Gram per litre | 6640 | g/L |
| Milligram per litre | 6640000 | mg/L |
| Kilogram per millilitre | 0,00664 | kg/mL |
| Gram per millilitre | 6,64 | g/mL |
| Milligram per millilitre | 6640 | mg/mL |
Conversion Chart British and U.S.:
| Pound per cubic yard | 11195,04 | lb/yd³ |
| Pound per cubic foot | 414,5352 | lb/ft³ |
| Pound per cubic inch | 0,2399032 | lb/in³ |
| Pound per U.S. gallon | 55,4108 | lb/gal |
| Pound per British gallon | 66,5328 | |
| Pound per U.S. bushel | 515,8616 | |
| Ounce per cubic yard | 179080,8 | oz/yd³ |
| Ounce per cubic foot | 6632,032 | oz/ft³ |
| Ounce per cubic inch | 3,83792 | oz/in³ |
| Ounce per U.S. gallon | 886,44 | oz/gal |
| Ounce per British gallon | 1065,056 | |
| Ounce per U.S. bushel | 8253,52 |
British Gravitational and English Engineering Units:
| Slug per cubic yard | 347,8696 | slug/yd³ |
| Slug per cubic foot | 12,8816 | slug/ft³ |
| Slug per cubic inch | 0,00745672 | slug/in³ |