# Square Diagonal Calculator

A square is defined as a** **closed two-dimensional figure with four sides and four corners. The length of all four sides is equal and parallel to each other.

## What is Square Diagonal Calculator?

'Cuemath's Square Diagonal Calculator' is an online tool that helps to calculate the value of the diagonal of the square. Cuemath's Square Diagonal Calculator helps you to calculate the value of the diagonal of the square within a few seconds.

## How to Use Square Diagonal Calculator?

Please follow the steps below on how to use the calculator:

**Step 1:**Enter the value of the side length in the input box.**Step 2:**Click on the "**Calculate**" button to find the value of the diagonal of the square.**Step 3:**Click on the "**Reset**" button to clear the field and enter the new value.

## How to Find Square Diagonal Calculator?

**Diagonal of a square**: In a square, the lengths of both the diagonals are the same. The length of a diagonal, d of a square of side length 'x' is calculated by the Pythagoras theorem.

**Diagonal of a square = √2 × side units**

**Solved Example:**

Find the diagonal of a square whose side is 5 units.

**Solution:**

Diagonal of a square = **√**2 × side units

=**√**2 × 5

= 7.071 units.

Similarly, now you can use the calculator to find the diagonal of a square for the following:

- Side length = 8 units
- Side length = 15 units

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