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Area Calculator
Calculate area of rectangle, circle, triangle, and square with formulas.
How to Use the Area Calculator
- Select a shape: Rectangle, Circle, Triangle, or Square.
- Enter the required dimensions (width, height, radius, base, or side).
- Click Calculate Area to see the result.
Formula & Method
Rectangle: A = width × height
Circle: A = π × r²
Triangle: A = ½ × base × height
Square: A = side²
Examples
| Shape | Input | Area |
|---|---|---|
| Rectangle | 10 × 5 | 50 sq units |
| Circle | r = 5 | 78.54 sq units |
| Triangle | base 10, height 5 | 25 sq units |
| Square | side = 4 | 16 sq units |
Frequently Asked Questions
What units does the area calculator use?
It uses generic square units; you can apply any unit of measurement.
Can I calculate area for irregular shapes?
This calculator handles standard geometric shapes only.
What is the formula for a circle area?
A = π × r² where r is the radius.
People Also Ask
How accurate is this calculator?
Our calculators use standard mathematical formulas and provide accurate results.
Can I use this on my phone?
Yes, all tools are fully responsive and work on any device.