---
title: numberOfUnits
framework: storekit
role: symbol
role_heading: Instance Property
path: storekit/skproductsubscriptionperiod/numberofunits
---

# numberOfUnits

The number of units per subscription period.

## Declaration

```swift
var numberOfUnits: Int { get }
```

## Discussion

Discussion A subscription period duration is calculated by multiplying the number of units by the unit. For example, if the number of units is 3, and the unit is SKProduct.PeriodUnit.month, the subscription period is 3 months.

## See Also

### Getting Subscription Period Details

- [unit](storekit/skproductsubscriptionperiod/unit.md)
- [SKProduct.PeriodUnit](storekit/skproduct/periodunit.md)