---
title: calculatePerimeter()
framework: vision
role: symbol
role_heading: Instance Method
path: vision/contoursobservation/contour/calculateperimeter()
---

# calculatePerimeter()

## Declaration

```swift
func calculatePerimeter() -> Double
```

## See Also

### Calculating area and perimeter

- [calculateArea(useOrientedArea:)](vision/contoursobservation/contour/calculatearea(useorientedarea:).md)