Area Calculator
Calculate the area and perimeter of any geometric shape — circles, rectangles, triangles, squares, trapezoids and ellipses.
What Does This Tool Do?
Enter your shape's dimensions and get instant area and perimeter calculations with the formula used.
Key Features
6 Shapes
Circle, rectangle, triangle, square, trapezoid and ellipse.
Formula Shown
Displays the formula used for each calculation.
Instant
Results appear immediately.
Perimeter Too
Calculates perimeter where applicable.
How to Use This Tool
- Select the shape.
- Enter the required dimensions.
- Click Calculate to get area and perimeter.
How It Works
Each shape uses its standard geometric formula. Circle: π×r², Rectangle: w×h, Triangle: ½×b×h, Square: s², Trapezoid: ½×(a+b)×h, Ellipse: π×a×b.
Common Use Cases
💡 Construction
Calculate floor or wall area for material estimates.
💡 Education
Verify geometry homework calculations.
💡 Design
Calculate areas for layout and design projects.
Frequently Asked Questions
Does it handle decimal dimensions?
Yes — any decimal value is accepted for all dimensions.
What units does it use?
The tool uses unitless calculation — if you enter meters, the result is in square meters.
Related Tools
Link to This Tool
Copy and paste the code below to link to this tool from your website:
<a href="https://adedx.com/tools/area-calculator/">Area Calculator — AdeDX Free Online Tools</a>