Math tools
Perimeter Calculator
Find the perimeter or circumference of common 2D shapes from their dimensions, alongside the matching area.
Free, no sign-up Works in your browser
Shape & dimensions
Area = w × h · Perimeter = 2(w + h)
Results
- Area
- 40
- Perimeter
- 26
- Diagonal
- 9.434
Units follow whatever you typed — squared for area, cubed for volume.