Step-by-Step Instructions

1. 1.
   Select Shape: Choose from rectangle, square, circle, or triangle based on your measurement needs. Each shape uses different dimensions for area calculation.
2. 2.
   Enter Dimensions: Input the required measurements in your preferred units. For rectangles, enter length and width; for circles, enter radius; for triangles, enter base and height.
3. 3.
   Click Calculate: The area calculator will instantly compute the area using the appropriate mathematical formula for your selected shape.
4. 4.
   Review Results: See your area calculation in square units, perfect for material estimation, project planning, or space analysis.

Calculator Features

How do you calculate the area of a circle?

The area of a circle is calculated using the formula A = π × r², where r is the radius. Our area calculator automatically uses the value of π (approximately 3.14159) to provide precise circle area calculations.

What is the difference between area and perimeter?

Area measures the space inside a shape (2D measurement), while perimeter measures the distance around the shape's boundary. Area is measured in square units, while perimeter uses linear units.

How do you calculate triangle area?

Triangle area is calculated using A = ½ × base × height. The base is any side of the triangle, and the height is the perpendicular distance from that base to the opposite vertex.

What units are used for area measurement?

Area is measured in square units such as square meters (m²), square feet (ft²), square inches (in²), or acres. The unit depends on the measurement system used for the dimensions.

How accurate are area calculations?

Our area calculator provides highly accurate results using precise mathematical formulas and the value of π to many decimal places. Results are accurate to two decimal places for practical applications.

Can I calculate area for irregular shapes?

This calculator handles standard geometric shapes. For irregular shapes, you can break them down into rectangles, triangles, and circles, calculate each area separately, then add them together for the total area.

How is area used in real life?

Area calculations are used for construction material estimation, property valuation, interior design, landscaping, painting projects, flooring installation, and many other practical applications.

What is the area formula for a square?

The area of a square is calculated by multiplying the side length by itself: A = side². Since all sides of a square are equal, you only need one measurement to calculate the area.