Area of a Square Calculator
A square has four equal sides and four right angles, so one measurement is enough: multiply the side by itself.
A = s²
Perimeter: P = 4s
Area of the square
25ft²
- Perimeter
- 20 ft
- A = s² = 5² = 25 ft²
Area in other units
| m² | 2.3226 |
| cm² | 23,225.8 |
| ft² | 25 |
| in² | 3,600 |
| yd² | 2.7778 |
| acres | 0.000574 |
| hectares | 0.000232 |
How to find the area of a square
Formula: A = s². Perimeter: P = 4s.
- Measure every length in the same unit. Mixing feet and inches is the most common mistake; convert first (6 in = 0.5 ft).
- Put the numbers into the formula above. The calculator shows each substitution with your numbers.
- Area comes out in square units (ft², m²). If you need a different unit, open "Area in other units".
Questions people ask
How do I find the side of a square from its area?
Take the square root of the area. A square of 49 ft² has sides of √49 = 7 ft.
What is the diagonal of a square?
The diagonal is s × √2, about 1.414 times the side, from the Pythagorean theorem.
Stuck on a word problem?
Paste a homework question or describe your project. The AI tutor names the formula and works it through step by step. Always check the result with the calculator above.
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