From QSPR Wiki
This browser allows to explore available Systems of units and allowed types of units for each system. The missing units can be added by the user. If there is a need to introduce a new system of units, please, request us. Like with any other terms, it is strongly requested that each unit will be clearly described on the corresponding Wiki page. This will make possible to avoid duplication and misuse of different units when introducing the data.
Please, also introduce Unit conversion formulas from the introduced to default and from default to the introduced unit. This will allow automatic interconversion of Units to be used for model development.