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User Guide
This online tool will calculate the length or width of a rectangular shaped surface from the area, and one other known dimension of length.
Once the parameters have been entered for area and the other known length dimension, the unknown length dimension will be calculated. Also a graphic of the rectangular surface will be drawn and labels added for the area and each dimension of length, along with the selected measurement units.
Formula
The formula used by this calculator to calculate the unknown length or width of a rectangular shaped surface is:
L2 = A / L1
Symbols
- A = Area
- L1 = 1st Length
- L2 = 2nd Length
Area
Enter the area of the rectangular shaped surface, and select the relevant area measurement units.
1st Length
Enter one of the known dimensions which can be either the length or width of the rectangular shaped surface, and select the relevant length measurement units.
2nd Length
This is the unknown dimension of length calculated from the area, and one other known dimension of length or width.