API Reference > imodeljs-frontend > QuantityFormatting > QuantityFormatter > activeUnitSystem activeUnitSystem AccessorReadOnly True if tool quantity values should be displayed in imperial units; false for metric. Changing this flag triggers an asynchronous request to refresh the cached formats. activeUnitSystem: UnitSystemKey Returns - UnitSystemKey Defined in core/frontend/src/quantity-formatting/QuantityFormatter.ts Line 591 Last Updated: 11 June, 2024