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Square calculator

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Input one value for a square, and the calculator will find the missing side, diagonal, area, perimeter, or radius. The calculator provides a step-by-step explanation of how to find the missing elements.

Square calculator
input any value of a square and select value to find
help ↓↓ examples ↓↓
The missing value:
Provide any value for a square
calculator works with decimals, fractions and square roots (to input $ \color{blue}{\sqrt{2}} $ type $\color{blue}{\text{r2}} $)
side
$ a $ =
 
area
$ A $ =
perimeter
$ P $ =
 
diagonal
$ d $ =
radius
$ R $ =
 
radius
$ r $ =
working...
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
example 1:ex 1:
Find the area of a square of diagonal $d = 12 cm$.
example 2:ex 2:
Find the side of the square whose perimeter is $d = 14 cm$.
example 3:ex 3:
Find the diagonal of the square whose area is $A = 18 cm^2$.
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