Geometry
Perimeter Calculator
Perimeter of a rectangle, or of n equal sides (regular polygon) via mode.
Free to use — no sign-up or login.
Perimeter
Amortization schedule
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This free Perimeter Calculator covers Perimeter of a rectangle, or of n equal sides (regular polygon) via mode.
Mode 0: rectangle 2(ℓ+w). Mode 1: regular n-gon n·s. Related geometry tools sit beside How it works, with no account required.
Using the Perimeter Calculator
Perimeter of a rectangle, or of n equal sides (regular polygon) via mode. Typical inputs are Mode (0 rectangle, 1 regular n-gon), Length ℓ or side s and Width w or n sides. How it works beside the form states the identity the Perimeter Calculator applies.
FAQ
How do I use the Perimeter Calculator?
Open the Perimeter Calculator, fill Mode (0 rectangle, 1 regular n-gon), Length ℓ or side s and Width w or n sides, and read the result. Mode 0: rectangle 2(ℓ+w). Mode 1: regular n-gon n·s.
What formula does the Perimeter Calculator use?
The Perimeter Calculator uses the identity in How it works. In words: Mode 0: rectangle 2(ℓ+w). Mode 1: regular n-gon n·s.