Rectangle area
Geometry
Use the free regular polygon perimeter calculator. Enter sides (integer ≥ 3), side length to get a result, with a formula and worked example.
This tool calculates regular polygon perimeter from Sides (integer ≥ 3), Side length. Enter each quantity in its labelled field, then use the formula below to check the calculation.
number of sides × side length
Applying the formula to these values gives 24 units.
Find the area, perimeter, surface area or volume of common shapes. Use consistent length units: metres produce square metres for areas and cubic metres for volumes.
Use the reset button to restore this example. Your inputs are processed in this browser and are not included in a shared calculator link. See our methodology and limitations.
If you need equipment for your project, these links open relevant Amazon UK searches. They are suggestions, not required to use the calculator.
As an Amazon Associate I earn from qualifying purchases. How these links work.