Square Perimeter Calculator
P = 4s. Four equal sides.
Result
Perimeter
32.0000
4 × 8.
- Side8
- Perimeter32.000000
- Area64.000000
- Diagonal11.313708
Step-by-step
- P = 4s = 4 × 8 = 32.0000.
- Area = s² = 64.0000.
- Diagonal = s√2 = 11.3137.
How to use this calculator
- Enter side length.
- Read perimeter, area, diagonal.
About this calculator
A square is a regular quadrilateral — all four sides equal, all angles 90°. Perimeter = 4s; area = s²; diagonal = s√2. The square has the maximum area for any rectangle of fixed perimeter (proof: AM-GM inequality). Common everywhere: room layouts, tile patterns, chess boards.
Frequently asked
Yes. Every square is a rectangle (opposite sides equal, angles 90°), but not every rectangle is a square.
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