---
title: mass
framework: swiftui
role: symbol
role_heading: Instance Property
path: swiftui/spring/mass
---

# mass

The mass of the object attached to the end of the spring.

## Declaration

```swift
var mass: Double { get }
```

## Discussion

Discussion The default mass is 1. Increasing this value will increase the spring’s effect: the attached object will be subject to more oscillations and greater overshoot, resulting in an increased settling duration. Decreasing the mass will reduce the spring effect: there will be fewer oscillations and a reduced overshoot, resulting in a decreased settling duration.

## See Also

### Getting spring characteristics

- [bounce](swiftui/spring/bounce.md)
- [damping](swiftui/spring/damping.md)
- [dampingRatio](swiftui/spring/dampingratio.md)
- [duration](swiftui/spring/duration.md)
- [response](swiftui/spring/response.md)
- [settlingDuration](swiftui/spring/settlingduration.md)
- [stiffness](swiftui/spring/stiffness.md)