Square Perimeter Calculator
Compute the perimeter of a square: P = 4 × side.
Calculator
Use the Square Perimeter Calculator
Result
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Formula
P = 4 × side
Step-by-step
- 1
Enter the side
Any positive length.
- 2
Read the perimeter
Total distance around.
Worked example
Example input: a: 4
Result: 16
Related tools
- Square Area
side².
Frequently asked questions
What is the perimeter of a square with side 4?
16. The perimeter adds up all four equal sides: P = 4 × side = 4 × 4 = 16.
Is perimeter the same as area?
No. Perimeter is the distance around the square — a length. Area is the surface inside it — a squared quantity. The digits can coincide (side 4 gives perimeter 16 and area 16) but they measure different things.
Which units does the result use?
Whatever unit the side was entered in. Give the side in centimeters and the perimeter also comes back in centimeters.
Are perimeter and area ever the same number?
They can match by accident — a side of 4 gives both perimeter 16 and area 16 — but they measure different things. Perimeter is the distance around the square in plain units, while area is the surface inside it in square units.