Square Calculator
Calculate area, perimeter, and diagonal from side length.
Formula
A = s², P = 4s, d = s√2
Area is the side squared. Perimeter is 4 times the side. Diagonal is side times √2.
Examples
Side = 4
Side = 7
Side = 10
Frequently Asked Questions
How do I find the area of a square?
Square the side length: A = s².
What is the diagonal of a square?
The diagonal is d = s√2, where s is the side length.
How is the perimeter of a square calculated?
P = 4s, multiply the side length by 4.
About this Calculator
Calculate area, perimeter, and diagonal from side length. All calculations are performed in your browser for instant results. Formulas are mathematically exact using JavaScript's built-in Math functions.