Square Calculator
A = s² | P = 4s | d = s√2
A square calculator computes area (s²), perimeter (4s), diagonal (s√2), and other properties of a square with side length s. Squares are special rectangles with all sides equal and all angles 90°.
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Pro Tip
The square is the rectangle with maximum area for a given perimeter. A square with perimeter 40 has area 100. A rectangle 5×15 with the same perimeter has area 75 — 25% less efficient.
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Did You Know?
The square is the most efficient shape for packing — a grid of squares covers 100% of a plane without gaps. Hexagons also cover 100% but with a shorter total perimeter per unit area, which is why honeycombs use hexagons (less wax needed).
References
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