Why use this calculator
Area calculations are needed for flooring, painting, landscaping, construction, and many other practical applications.
How to use it
Select a shape, enter the dimensions, and get the area plus perimeter/circumference.
The formula
Rectangle: A = L × W. Circle: A = πr². Triangle: A = ½ × base × height.
Worked examples
10×5 rectangle
50 square units, perimeter 30
When people use it
- Home improvement
- Landscaping
- Construction
- Math homework
Tips
- Make sure your units are consistent
- For irregular shapes, break them into simpler shapes
- Always add 10% for material waste in practical projects
Questions people ask
- How do I calculate the area of an irregular shape?
- Break it into rectangles, triangles, and circles. Calculate each area separately and add them up.