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Square calculator

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This solver calculate missing side, diagonal, area, perimeter or radius of a square. The calculator provides a step-by-step explanation of how to find the missing elements.

Square calculator
Provide any element of a square, then choose a missing one.
help ↓↓ examples ↓↓
Solve for
Provide one element of a square.
a =
 
A =
P =
 
d =
R =
 
r =
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Square formulas
$$ A = a^2 $$
area
$$ P = 4a $$
perimeter
$$ d = a\sqrt{2} $$
diagonal
$$ R = \frac{a\sqrt{2}}{2} $$
circumcircle radius
$$ r = \frac{a}{2} $$
incircle radius
Examples
ex 1:
Find the area of a square of diagonal d = 12 cm.
ex 2:
Find the side of the square whose perimeter is d = 14 cm.
ex 3:
Find the diagonal of the square whose area is A = 18 cm2.
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