Area & Perimeter Calculator
Calculate area and perimeter for various geometric shapes
Shape Visualization
Common Shapes Reference
Square
Area = s²
Perimeter = 4s
s = side length
Rectangle
Area = l × w
Perimeter = 2(l + w)
l = length, w = width
Triangle
Area = ½ × b × h
Perimeter = a + b + c
b = base, h = height
Circle
Area = πr²
Circumference = 2Ï€r
r = radius, π ≈ 3.14159
Area is measured in square units. Perimeter is measured in linear units.