Rectangular Prism Calculator

Math guide

How to use the Rectangular Prism Calculator

Calculate rectangular prism volume, surface area, and space diagonal. The page also explains the rectangular prism and shows a practical example: 6 by 4 by 3 gives volume 72.

  1. 1

    Enter your details

    Enter the values for the rectangular prism calculator scenario you want to check.

  2. 2

    Check the calculation

    Review the result alongside the rectangular prism: Volume = length x width x height; surface area = 2(lw + lh + wh).

  3. 3

    Compare scenarios

    Change one or more inputs to see how they affect the rectangular Prism Calculator result before you use the estimate.