# usage The intended purpose of the formatted measurement. ``` var usage: MeasurementFormatUnitUsage? ``` ## Discussion You can use the `usage` property to specify the intended purpose of the formatted measurement. The default option, `general`, formats the measurement with the default unit for the current locale. The `asProvided` option formats the measurement using the specified unit, ignoring the unit that the locale uses. The following example shows a formatted temperature using the default unit for the `en_US` locale and using a provided Celsius unit: ```swift let temperature = Measurement(value: 36.8, unit: .celsius) temperature.formatted() // 98°F temperature.formatted(.measurement(width: .abbreviated, usage: .asProvided)) // 36.8°C ``` All unit types have `general` and `asProvided` options. Some subclasses have additional options, such as the following: [`UnitTemperature`](/documentation/Foundation/UnitTemperature) - `person` - `weather` [`UnitLength`](/documentation/Foundation/UnitLength) - `person` - `personHeight` - `road` [`UnitEnergy`](/documentation/Foundation/UnitEnergy) - `food` - `workout` [`UnitMass`](/documentation/Foundation/UnitMass) - `personWeight` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)