Square - Side: 5
Shape: Square; Side Length (Square): 5 units; Length (Rectangle): 10 units; Width (Rectangle): 5 units; Side Length (Equilateral Triangle): 6 units; Radius (Circle): 3 units
Perimeter: 20 units
Perimeter Calculator
Math0.0(0)
Calculates the perimeter (boundary length) of various common 2D shapes.
More tools:Math & Statistics Calculators
How To Use
How to use this calculator
Start with your values, or try a preset.
Step 1
Enter Shape, Side Length (Square), Length (Rectangle), Width (Rectangle), Side Length (Equilateral Triangle), and Radius (Circle) in the units shown.
Step 2
Read Perimeter in the results panel. Results update as you change the inputs.
Step 3
Choose a preset to load an example, then adjust the values for your situation.
Worked Examples
Example calculations
See the inputs and their calculated results.
Rectangle - Length: 10, Width: 7
Shape: Rectangle; Side Length (Square): 5 units; Length (Rectangle): 10 units; Width (Rectangle): 7 units; Side Length (Equilateral Triangle): 6 units; Radius (Circle): 3 units
Perimeter: 34 units
Triangle - Side: 8
Shape: Triangle (Equilateral); Side Length (Square): 5 units; Length (Rectangle): 10 units; Width (Rectangle): 7 units; Side Length (Equilateral Triangle): 8 units; Radius (Circle): 3 units
Perimeter: 24 units
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