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