Free Online Area Calculator with 3D Visualization

How to Use:

1. Select the shape you want to calculate (e.g., Rectangle, Polygon).
2. Enter the required dimensions in your preferred units (feet/yards/meters plus inches/cm for precision).
3. For polygons, add as many vertices as you need and enter their coordinates.
4. Click Calculate to see the area, formula used, and a 3D visual of your shape.
5. 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