---
title: stone()
framework: healthkit
role: symbol
role_heading: Type Method
path: healthkit/hkunit/stone()
---

# stone()

Returns a HealthKit unit for measuring mass in stones.

## Declaration

```swift
class func stone() -> Self
```

## Return Value

Return Value A HealthKit unit for measuring mass in stones.

## See Also

### Constructing mass units

- [gram()](healthkit/hkunit/gram().md)
- [gramUnit(with:)](healthkit/hkunit/gramunit(with:).md)
- [ounce()](healthkit/hkunit/ounce().md)
- [pound()](healthkit/hkunit/pound().md)
- [moleUnit(withMolarMass:)](healthkit/hkunit/moleunit(withmolarmass:).md)
- [moleUnit(with:molarMass:)](healthkit/hkunit/moleunit(with:molarmass:).md)
- [HKUnitMolarMassBloodGlucose](healthkit/hkunitmolarmassbloodglucose.md)