Square Calculator
Find a square’s area, perimeter and diagonal.
Result
How to use
- Enter your values in the fields above.
- Press Calculate to see your result instantly.
- Use the Share button to copy a link to your result.
About this calculator
This calculator takes a square's side length and computes its area (side²), perimeter (4 × side), and diagonal (side × √2), the three measurements that fully describe a square's size.
It's used for everyday sizing tasks — tiling a square room, cutting a square piece of fabric or material, or fencing a square plot of land — as well as for geometry homework asking for area, perimeter and diagonal together. The diagonal is often the trickiest of the three since it requires the square root of 2, which this calculator handles instantly instead of requiring a manual Pythagorean calculation.
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