Math & Statistics · Tool #22
Perimeter Calculator
Calculate the perimeter of common geometric shapes.
Shape & Dimensions
Choose a shape and enter its side/radius dimensions.
Perimeter is the total boundary length. For a circle, the boundary is its circumference.
Perimeter Result
Boundary length and shape.
Perimeter
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Shape
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Related value
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How to use this calculator
What to enter
Enter or select the following as requested: Shape. Follow the units, valid ranges, examples, and options displayed beside each field.
What the result means
The result is the length around the shape or along the specified curve. Check the output unit and whether the calculator expects radius, diameter, side lengths, or angles.
When to use it
Use this to estimate boundary length, edging, fencing, or the length of a geometric curve.