Free Online Area Calculator with 3D Visualization
Quickly and accurately calculate the area of rectangles, squares, circles, triangles, trapezoids, parallelograms, and polygons with our interactive area calculator. Enjoy instant results, unit conversions, 3D visualizations, and server-verified accuracy. No registration required!
How to Use:
- Select the shape you want to calculate (e.g., Rectangle, Polygon).
- Enter the required dimensions in your preferred units (feet/yards/meters plus inches/cm for precision).
- For polygons, add as many vertices as you need and enter their coordinates.
- Click Calculate to see the area, formula used, and a 3D visual of your shape.
- All results in m², ft², yd², in², and cm² are shown together. Copy or download your result, or view your calculation history.
Example Calculations:
- Rectangle: Length = 10 yd, Width = 5 ft → Area: ... (auto-converted result)
- Circle: Radius = 3 m → Area: 28.274 m²
- Polygon: Vertices: (0,0), (4,0), (4,3), (0,3) → Area: 12 m² (Shoelace formula)
Supported Shapes:
- Rectangle, Square, Triangle, Circle, Trapezoid, Parallelogram, Polygon (multi-vertex, custom coordinates)
Why Use This Calculator?
- Fast, mobile-friendly, and accurate
- 3D visual of your shape (powered by Three.js)
- Server-side calculation API ensures precision
- Calculation history, export/copy, and accessibility features included