API Reference > imodeljs-frontend > QuantityFormatting > QuantityTypeDefinition > persistenceUnit persistenceUnit Readonly persistenceUnit: UnitProps The unit that the magnitude of the quantity is stored ie. (Meter for Length and Radian for Angle). The persistence unit is also used during formatting if the FormatProps does not define one or more composite units. Defined in core/frontend/src/quantity-formatting/QuantityFormatter.ts Line 123 Last Updated: 11 June, 2024