Perimeter Calculator
Calculate the perimeter of rectangles, squares and circles.
Perimeter
28.0000
Formulas
Rectangle: Area = w × h, Perimeter = 2(w + h)
Square: Area = s², Perimeter = 4s
Circle: Area = πr², Circumference = 2πr
Triangle: Area = ½ × base × height
Frequently Asked Questions
What is the perimeter of a rectangle with 10.00 × 4.00?
28.0000.