The density, or more precisely, the volumetric mass density of technetium is 11500 kg/m³. This means that the mass of 1 m³ technetium is 11500 kg.
The weight (on earth) of 1 m³ technetium is 112815 N or 112,815 kN.
Conversion Chart Metric System:
| Kilogram per cubic meter | 11500 | kg/m³ |
| Tonne per cubic meter | 11,5 | t/m³ |
| Gram per cubic meter | 11500000 | g/m³ |
| Milligram per cubic meter | 11500000000 | mg/m³ |
| Kilogram per cubic centimeter | 0,0115 | kg/cm³ |
| Gram per cubic centimeter | 11,5 | g/cm³ |
| Milligram per cubic centimeter | 11500 | mg/cm³ |
| Kilogram per litre | 11,5 | kg/L |
| Gram per litre | 11500 | g/L |
| Milligram per litre | 11500000 | mg/L |
| Kilogram per millilitre | 0,0115 | kg/mL |
| Gram per millilitre | 11,5 | g/mL |
| Milligram per millilitre | 11500 | mg/mL |
Conversion Chart British and U.S.:
| Pound per cubic yard | 19389 | lb/yd³ |
| Pound per cubic foot | 717,945 | lb/ft³ |
| Pound per cubic inch | 0,415495 | lb/in³ |
| Pound per U.S. gallon | 95,9675 | lb/gal |
| Pound per British gallon | 115,23 | |
| Pound per U.S. bushel | 893,435 | |
| Ounce per cubic yard | 310155 | oz/yd³ |
| Ounce per cubic foot | 11486,2 | oz/ft³ |
| Ounce per cubic inch | 6,647 | oz/in³ |
| Ounce per U.S. gallon | 1535,25 | oz/gal |
| Ounce per British gallon | 1844,6 | |
| Ounce per U.S. bushel | 14294,5 |
British Gravitational and English Engineering Units:
| Slug per cubic yard | 602,485 | slug/yd³ |
| Slug per cubic foot | 22,31 | slug/ft³ |
| Slug per cubic inch | 0,0129145 | slug/in³ |