📐 Area Calculator

Enter dimensions to calculate area. Supports circle, triangle, rectangle, square, parallelogram, trapezoid, ellipse, and regular polygon shapes.

Circle

Triangle

Rectangle

Square

Parallelogram

Trapezoid

Ellipse

Regular Polygon

Area

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How to Use the Area Calculator

Using the Area Calculator is straightforward:

Enter Your Values
Input the required numbers and parameters into the calculator fields. Each field is clearly labeled — simply type your values or use the spinner controls to adjust them.
Configure Options
Select any additional options such as computation mode, currency, time period, or precision level. The calculator updates automatically as you change values.
View the Results
The calculated result is displayed instantly with clear formatting. You can Copy the result to your clipboard or adjust input values to see how different scenarios affect the outcome.

Circle area formula: A = pi r^2, where r is radius. Example: a circle with radius 5m has area pi x 25 approx 78.54 m^2.

Triangle area: A = 1/2 x base x height. With three known sides, use Heron's formula.

Trapezoid area = 1/2 x (base_a + base_b) x height. Half the sum of parallel sides times height.

Regular polygon area = 1/2 x side^2 x n x cot(pi/n). This calculator uses side length and number of sides.

Ellipse area = pi x a x b, where a is the semi-major axis and b is the semi-minor axis length.