Just type the side of the square below and click Calculate Area. Use a period or comma as the decimal separator.
Square Area Calculator
Result:
How to use the calculator
- Type the side length of the square in the Side field. Use a period or comma as the decimal separator.
- Select the unit of measurement (mm, cm, m, km or in.).
- Click Calculate Area to see the result in the Result field.
- Click Clear to reset.
Square area formula
The area of a square is calculated by squaring the side length:
A = L²
Where L is the side length. The result is always expressed in area units (squared): cm², m², mm², etc.
Practical examples
| Side (L) | Area (A = L²) |
|---|---|
| 3 m | 9 m² |
| 5 cm | 25 cm² |
| 7.5 m | 56.25 m² |
| 10 mm | 100 mm² |
| 1.2 km | 1.44 km² |
Frequently asked questions
What is the formula for the area of a square?
The area of a square is calculated using A = L², where L is the side length. For example, a square with a side of 5 cm has area A = 5² = 25 cm².
Is the area of a square always in square units?
Yes. Since area represents a surface (two dimensions), the unit of measurement is always squared: cm², m², mm², etc. If the side is given in cm, the area will be in cm².
How do I calculate the area of a square from its diagonal?
If you know the diagonal d, use A = d² ÷ 2. This is because the diagonal of a square measures d = L√2, and substituting into A = L² gives A = d²/2.
What is the difference between the area and perimeter of a square?
The area (A = L²) measures the internal space of the figure, in square units. The perimeter (P = 4 × L) measures the total length of the four sides, in linear units.
Can I use a comma instead of a decimal point?
Yes! This calculator accepts both a comma and a period as the decimal separator: 3.5 and 3,5 produce the same result.
See also…
