Perimeter of a Square Calculator
Use this calculator to find the perimeter of a square when you know its side length.
Perimeter is the total distance around the square (in units).
In the diagram, each side is labeled a.
Step-by-step method
- Identify what is given.
- Write the formula.
- 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
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