| # | Name | Symbol | System | Quantity Type |
| 0 | ElectronMass | <me> | Natural | Mass |
| 1 | ProtonMass | <mp> | Natural | Mass |
| 2 | Dalton | <Da> | Natural | Mass |
| 3 | UnifiedAtomicMass | <u> | Natural | Mass |
| 4 | Gram | <g> | Metric.SI | Mass |
| 5 | MetricTonne | <mt> | Metric.Mts | Mass |
| 6 | Hyl | <hyl> | Metric.Gravitational | Mass |
| 7 | Slug | <slug> | English | Mass |
| 8 | Grain | <gr> | English | Mass |
| 9 | Drachm | <drachm> | English | Mass |
| 10 | Ounce | <oz> | English | Mass |
| 11 | Pound | <lbm> | English | Mass |
| 12 | Stone | <st> | English | Mass |
| 13 | Quarter | <quarter> | English | Mass |
| 14 | Hundredweight | <cwt> | English | Mass |
| 15 | Tonne | <t> | English | Mass |
| 16 | SolarMass | <Mo> | Astronomical | Mass |