Quickly compute the area of common geometric shapes with our easy-to-use calculator
Enter values and click Calculate Area to see results here.
Our free online Area Calculator tool makes it quick and easy to calculate the area of popular 2D geometric shapes. Whether you’re a student, teacher, engineer, architect, or just someone needing a fast calculation, this tool gives you accurate results in seconds. You can calculate the area of rectangle, square, circle, triangle, parallelogram, trapezoid, ellipse, and circular sector with step-by-step formulas. Simply choose a shape, enter the required dimensions (such as length, width, radius, base, or height), and the calculator instantly provides: The calculated area in your chosen unit (cm², m², ft², etc.), The exact formula used for the calculation, A clear breakdown of inputs for better understanding
Area tells you how much surface a shape covers. It's essential for tasks like buying floor tiles, painting walls, planning farms/plots, cutting materials, or solving geometry problems.
| Shape | Formula |
|---|---|
| Rectangle | A = L × W |
| Square | A = s² |
| Circle | A = πr² |
| Triangle | A = ½ × base × height |
| Parallelogram | A = base × height |
| Trapezoid | A = ½ × (A + B) × height |
| Ellipse | A = πab (a = semi-major, b = semi-minor) |
| Sector | A = (θ/360) × πr² |
The calculator shows results in squared units (e.g., m², cm², ft²). Keep your inputs in the same unit system for correct results. To convert, 1 m² = 10,000 cm², and 1 ft² ≈ 0.092903 m².