Area of a Rectangle Calculator

Your details

Choose which two values you know. The calculator solves for the rest.
All inputs and outputs use this unit for lengths. Area is shown in the squared unit.
The longer side of the rectangle.
m
The shorter side of the rectangle.
m
Known area, in the squared unit of the chosen length unit.
Known perimeter (the total distance around the rectangle).
m
Known diagonal (the straight-line distance between opposite corners).
m
Area
60

The space enclosed by the rectangle.

Perimeter32
Diagonal11.6619
Aspect ratio1.67 : 1
Area unitm²
Linear unitm

Area: 60.0000 m²

  • The area is 60.0000 m². To cover this rectangle you would need that much material, paint, or flooring.
  • The perimeter is 32.0000 m. This is the total length of fencing, trim, or border needed.
  • The diagonal is 11.6619 m. A right-angle check: if the actual diagonal matches this value, the corners are square.

Next stepFor rooms or land parcels with irregular shapes, break the space into separate rectangles, calculate each area, and add them together.

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