Perimeter Calculator
Calculate perimeter and area of various geometric shapes with step-by-step solutions
📐 Perimeter Calculator
Formula
P = 2(l + w)
Where:
- P =Perimeter
- C =Circumference
- l =Length
- w =Width
- s =Side length
- r =Radius
- a, b, c =Triangle sides
- n =Number of sides
- b₁, b₂ =Trapezoid bases
- leg =Trapezoid leg length
About Perimeter
Perimeter is the total distance around the outside of a two-dimensional shape. It's the sum of all the sides of a polygon or the circumference of a circle.
Common Formulas:
- • Rectangle: P = 2(length + width)
- • Square: P = 4 × side
- • Circle: C = 2πr (circumference)
- • Triangle: P = side₁ + side₂ + side₃
- • Regular Polygon: P = n × side length
Applications:
- • Fencing and boundary calculations
- • Construction and architecture
- • Material estimation (trim, edging)
- • Sports field design
- • Garden and landscape planning
Tips
- Enter the dimensions in the same unit for consistency.
- Results update automatically as you type.
- Use the unit selector to convert between different measurement systems.