Square Area Calculator

Find the area, perimeter, and diagonal of a square from its side, area, or diagonal.

Input

Enter the side, area, or diagonal of a square to compute its area along with the perimeter and diagonal.

Value to enter

Side a

Area S

100

Side a

Perimeter L

Diagonal d

14.142136

Length units match your input, and the area is in those units squared.

The area of a square is S = a², where a is the side length.
The perimeter is L = 4a and the diagonal is d = a times the square root of 2 (about 1.41421 times the side).
To work back from the area use a = square root of S, and from the diagonal use a = d divided by the square root of 2.
Length units match the input value, while the area is squared (for example a side in cm gives an area in cm²).

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