Rectangle Perimeter Calculator
Rectangle Perimeter Calculator — calculate the perimeter of a rectangle given length and width.
Formula
Perimeter = 2(Length + Width)
- Rectangle Perimeter: P = 2(L + W) = 2L + 2W.
- Also calculates area (L × W) and diagonal using Pythagorean theorem: d = √(L² + W²).
Rectangle 10 × 6 units
Inputs
- Length (units): 10
- Width (units): 6
Perimeter = 2(10 + 6) = 32 units; Area = 60 sq units; Diagonal ≈ 11.66 units.
Frequently asked questions
What's the formula for rectangle perimeter?
Perimeter = 2 × Length + 2 × Width = 2(L + W). It's the total distance around the rectangle.
How do I find the diagonal?
Use the Pythagorean theorem: Diagonal = √(L² + W²).
Is a square a rectangle?
Yes, a square is a special rectangle where length equals width. For a square: P = 4 × side.
Can I use this to find area?
Yes, the calculator also shows area = Length × Width.