# numberFormatStyle The formatting of the measurement value. ``` var numberFormatStyle: FloatingPointFormatStyle? ``` ## Discussion The `numberFormat` property specifies the formatting of the measurement value. You can customize the precision, grouping, and rounding mode of the measurement by creating a numeric number format style. The following example shows a customized measurement format style that includes two decimal numbers and excludes separators: ```swift let volume = Measurement(value: 2300, unit: .milliliters) volume.formatted(.measurement(width: .abbreviated, usage: .asProvided, numberFormatStyle: .number .precision(.fractionLength(2)) .grouping(.never))) // "2300.00 mL" ``` --- 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)