Qatium uses the same units as the EPANET engine, either customary (US) or international system (SI) depending on the units present in source data that's uploaded into Qatium.
| International System | US Customary system | |
| Network length | km | mi (mile) |
| Element lenght | m | ft |
| Flow / Assigned demand | l/s | gal/min |
| Height | m | ft (feet) |
| Pressure (max, min, mean) | mwc | psi (pound per square inch) |
| Headloss | mwc/km | ft/kft (feet/kilofeet) |
| Volume | m3 | ft3 |
| Capacity / Average error (model deviation) / Relative speed (pump) | % | % |
| Velocity | m/s | ft/s (feet per second) |
| Pipe diameter | mm | in (inches) |
| Tank diameter | m | ft |
| Upstream / Downstream pressure | mwc | psi (pound per square inch) |
| Power | kw | hp |
| Elevation | m | ft |
| Relative head | m | ft |
| Water age | h | h |
Please, tell us if you are having trouble with units in Qatium.