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# Square calculator

Enter one known value and calculate the side, area, perimeter or diagonal of a square. You will get solution with step-by-step explanation.

Square Calculator
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 Enter known values: side a = area A = perimeter P = diagonal d = Select value to find: side a area A perimeter P diagonal d
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# Formulas for Square

To calculate missing value in square, based on one known value, you need to remember just three formulas. F1: $$P = 4 \cdot a$$ a = side d = diagonal A = area P = perimeter F2: $$A = a^2$$ F3: $$d = a \cdot \sqrt{2}$$

The diagram at the right shows when to use each of these formulas.

## Example 1:

If you are given diagonal d and you want to calculate side a, then you need to use formula which connects d and a.

## Example 2:

If you are given area A and you want to calculate perimeter P then you need to make two steps to calculate perimeter. In first step you apply formula which connects area A and side a after that use formula which connects side a and perimeter P.

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