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Rectangle Calculator

Choose a Calculation: Calculate Area and Perimeter | Given Length and Width Calculate Width and Perimeter | Given Area and Length Calculate Width and Area | Given Perimeter and Length Enter l =    w =    Units =  meters inches feet a =  p =

Rectangle Geometric Shape l = length w = width a = area p = perimeter

Rectangle Formulas:

If you know any 2 values for the rectangle (length, width, area or perimeter) you can calculate the other 2 rectangle unknowns. A square calculation is a special case of the rectangle where the length is equal to the width.

Area of a rectangle:

a = l * w

Perimeter of a rectangle:

p = 2l + 2w

Rectangle Calculations

• Given the length and width find the area and perimeter
  l and w are known; find a and p
  • a = l * w
  • p = 2l + 2w
• Given the area and length find the width and perimeter
  a and l are known; find w and p
  • w = a/l
  • p = 2l + 2w
• Given the perimeter and length find the width and area
  p and l are known; find w and a
  • w = p/2 - l
  • a = l * w