Calculate the perimeter (or circumference for circles) of common 2D geometric shapes including circles, squares, rectangles, triangles, and more.
- Select the shape you want to calculate
- Enter the required dimensions
- View the calculated perimeter instantly
- Support for 9 different 2D shapes
- Real-time calculations
- Multiple unit options
- Ellipse perimeter using Ramanujan approximation
- What is the difference between perimeter and circumference?
- Circumference is the perimeter of a circle. Both measure the total length around a shape.
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