Square Area Calculator
Calculate the area, perimeter, and diagonal of a square from its side length.
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Area
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Perimeter
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Diagonal
Recent Calculations
What Is Square Area?
A square is a regular quadrilateral with four equal sides and four 90° angles.
Formula
Area = s², Perimeter = 4s, Diagonal = s√2Example
A square with side 8 has area = 64, perimeter = 32, diagonal = 11.31.
Frequently Asked Questions
How do I find the side from the area?
Side = √Area. For area 64, side = √64 = 8.
What's the diagonal of a square?
Diagonal = side × √2 ≈ side × 1.414.