Calculate the area of 8 common geometric shapes — rectangle, square, circle, triangle, trapezoid, parallelogram, rhombus, and ellipse. Instant results with formulas shown. Pure client-side.
Rectangle: length × width
Circle: π × radius²
Triangle: ½ × base × height
This area calculator computes the area and perimeter of 8 common geometric shapes. Simply select a shape, enter the required measurements, choose your unit system, and get instant results with the formula used. All calculations happen in your browser — no data is sent to any server. Perfect for students, engineers, designers, and anyone who needs quick geometry calculations.
This calculator supports 8 common geometric shapes: Rectangle, Square, Circle, Triangle, Trapezoid, Parallelogram, Rhombus, and Ellipse. Each shape requires specific measurements to calculate both area and perimeter.
Yes, the area calculator is completely free to use. No registration, no ads, and no limits. All calculations happen in your browser — no data is sent to any server.
Yes, you can choose between centimeters (cm), meters (m), inches (in), and feet (ft). The calculator automatically converts the results to the corresponding area units (cm², m², in², ft²).
Yes, after calculating, the formula used is displayed in a formula box below the results. This helps you understand the math behind the calculation and is useful for learning and verification.
Area measures the space inside a shape (in square units), while perimeter measures the total length of the shape's boundary (in linear units). This calculator provides both values for all supported shapes.
This calculator focuses on standard geometric shapes. For irregular shapes, you can break them down into simpler shapes (like rectangles and triangles), calculate each area separately, and then sum them up.
Yes, the calculator uses standard mathematical formulas and provides results with up to 4 decimal places for precision. For engineering or critical applications, always verify with additional methods.
Absolutely. The calculator is fully responsive and works seamlessly on smartphones, tablets, and desktop computers.