MyCalcBuddy

Perimeter Calculator

Calculate the perimeter of various geometric shapes.

Select Shape

Perimeter

30.0000

units

Calculation

Formula

P = 2(l + w)

Calculation

P = 2(10 + 5) = 2(15) = 30

Perimeter Formulas

Rectangle

P = 2(l + w)

Square

P = 4s

Circle

C = 2πr

Triangle

P = a + b + c

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Editorial Note

MyCalcBuddy Editorial Team

This page is maintained as an educational calculator reference.

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Formula Source: Handbook of Mathematical Functions

by Abramowitz & Stegun

🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.