Area Calculator

Easily calculate the area of various 2D shapes including rectangles, circles, triangles, trapezoids, and ellipses.

Area

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Formula —

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Calculate Areas of Various Shapes at Once

Accurately calculate the area of various 2D shapes including rectangles, circles, triangles, trapezoids, ellipses, and parallelograms. Automatically applies the correct formula for each shape to provide fast and accurate results.

Real-time Calculation and Visual Results

Results update instantly as you change input values. Charts allow you to visually compare calculated areas and perimeters for intuitive understanding.

Useful for Construction, Design, and Education

Can be used for various purposes such as area calculations needed for architectural or interior design, student math learning, and land area calculations. Accurate calculations help with material purchases and construction estimates.

Perimeter Calculation Included

Calculates and provides not only the area but also the perimeter of the shape. Useful for tasks requiring perimeter information such as fence installation, border decoration, and frame making.

Supports Both Mobile and Desktop

Responsive design allows convenient use on smartphones, tablets, and desktops anywhere. Calculate areas on-site immediately or use for precise design work in the office.

Accurate Formulas and Unit Conversion

Uses mathematically verified accurate formulas for calculations. Results are displayed precisely to decimal places and can be converted to various units as needed.

Frequently asked questions

Which shapes can I calculate the area of?

You can calculate the area and perimeter of seven shapes: rectangle, square, circle, triangle, trapezoid, ellipse, and parallelogram.

Do all my inputs need to use the same unit?

Yes, all dimensions (width, height, radius, etc.) must be entered in the same unit, such as cm or m, otherwise the result will be inaccurate.

How is the area of a circle calculated?

Enter the radius (r), and the area is calculated as π×r², while the perimeter (circumference) is calculated as 2×π×r.

What values do I need for a triangle's area?

Enter the base and height, and the area is calculated as base×height÷2. To also get the perimeter, you need the lengths of all three sides.

How precise are the results?

Results are displayed with decimal precision; you can round them as needed for practical use such as material estimates.