Perimeter of a Square Calculator

This Perimeter of a Square Calculator helps you find the total distance around a square when the side length is known. It uses the formula P = 4a, where a is the side length and the answer is written in units. Multiply the side length by 4 to get the perimeter. It is a simple way to check answers, understand the square perimeter formula, and practise basic geometry step by step.

In the diagram, each side is labeled a.

Step-by-step method

1. Identify what is given.
2. Write the formula.
3. Substitute the value and calculate the perimeter.

Formula:

Example 1: a = 5

Step 1 - Identify what is given.

In this problem: The given side length is a = 5.

Step 2 - Write the formula.

In this problem: Use the square perimeter formula: P = 4a.

Step 3 - Substitute the value and calculate the perimeter.

In this problem: Substitute a = 5: P = 4 × 5 = 20.

Final answer: P = 20

Example 2: a = 3.5

Step 1 - Identify what is given.

In this problem: The given side length is a = 3.5.

Step 2 - Write the formula.

In this problem: Use the square perimeter formula: P = 4a.

Step 3 - Substitute the value and calculate the perimeter.

In this problem: Substitute a = 3.5: P = 4 × 3.5 = 14.

Final answer: P = 14