Surface Area of a Rectangle Calculator

Your details

The longer side of the rectangle (length). Must be greater than zero.
m
The shorter side of the rectangle (width or breadth). Must be greater than zero.
m
Surface Area
50

Length times width - the total flat space inside the rectangle

Perimeter30
Diagonal11.1803
Aspect Ratio2.00:1
Area Unitm²
Length10
Width5

Surface area is 50.0000 m².

  • The surface area is 50.0000 m², found by multiplying 10 m by 5 m.
  • The perimeter is 30.0000 m, the total distance around all four sides.
  • The diagonal is 11.1803 m, the straight-line distance between opposite corners.

Next stepNeed the surface area of a 3D rectangular box? Multiply the sum of all three face pairs by 2: 2 x (length x width + width x height + height x length).

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