Rectangle Calculator

The Online Rectangle Calculator is a unique program that is apt of calculating the area and volume of a rectangle and rectangular cuboid.

Dimensions for 2d Rectangle

  • Attention: If area or volume are changed, this will have an effect upon the value of width, height and depth.
  • The "lock" boxes can be clicked on to keep the dimensions that are required.

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Dimensions for 3d Rectangle

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You may set the number of decimal places in the online calculator. By default there are only two decimal places.

The basic definitions of the rectangle and the rectangular cuboid

A rectangle can be defined as a geometrical figure that has four sides at right angles to each other. Moreover, the opposite sides are equal to each other. This property is different to a square.

A rectangular cuboid can be defined as a geometrical shape where all angles are right angles and opposite faces are equal to each other. Thus, we may say that is makes it a rectangular prism which can also be called a rectangular parallelepiped or orthogonal parallelepiped.

The dimensions, involved in calculations, are: height, width, area, depth, volume, surface area and diagonal depending on what the user needs.

Attention: If area or volume are changed, this will have an effect upon the value of height, width and depth. The "lock" boxes can be clicked on to keep the dimensions that are required.

The number of decimal places to which the calculations are carried out is preset to be 2, but the user can easily alter it.

Basic information of how to work out the area of a Rectangle

a x b = c where:

  • a = width
  • b = height
  • c = area of a rectangle

Basic information of how to work out the area of a Rectangular Cuboid

a x b x c = d where:

  • a = width
  • b = height
  • c = depth area of a rectangle
  • d = area of a rectangular cuboid

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