Area of Plane Shapes Calculator Using HTML, CSS and JavaScript with Source Code


Welcome to the Area of Plane Shapes Calculator, a comprehensive tool designed to simplify geometric computations effortlessly. This web-based application leverages the power of HTML, CSS, and JavaScript to offer users an intuitive platform for determining the areas of various two-dimensional figures. With its user-friendly interface and real-time calculation capabilities, this calculator is tailored to meet the diverse needs of students, educators, and professionals alike.

Built upon a foundation of modern web technologies, this calculator provides a seamless experience across different devices and screen sizes. From rectangles to circles, squares to triangles, users can select their desired shape from a dropdown menu and input the necessary dimensions with ease. The calculator then dynamically computes the area and presents the result instantaneously, empowering users to make quick and accurate calculations without the need for manual formulas or complex mathematics. Whether for educational purposes, architectural planning, or everyday practicality, the Area of Plane Shapes Calculator is your go-to solution for swift and efficient geometric computations.

You may also check this simple HTML, CSS and JavaScript projects:


  1. Versatility: This calculator can compute the area of various plane shapes, including rectangles, squares, circles, and triangles, providing a versatile solution for different geometrical needs.
  2. User-Friendly Interface: The interface is intuitive and easy to use, featuring dropdown selection for choosing the shape and input fields for necessary dimensions.
  3. Real-Time Results: Upon calculation, the result is instantly displayed, allowing users to quickly obtain the area without the need for manual calculations.

Technologies Used:

  1. HTML: The structure of the calculator, including forms, input fields, and dropdown selection, is defined using HTML (Hypertext Markup Language).
  2. CSS: Cascading Style Sheets (CSS) are employed to enhance the visual presentation of the calculator, providing styling for layout, fonts, colors, and backgrounds.
  3. JavaScript: The functionality of the calculator, such as calculating the area based on user inputs and dynamically updating the interface, is implemented using JavaScript, a client-side scripting language.

How to Use:

  1. Select Shape: Choose the desired plane shape from the dropdown menu provided. Options include Rectangle, Square, Circle, and Triangle.
  2. Enter Dimensions: Depending on the selected shape, input fields will appear for entering the necessary dimensions. For example, for a Rectangle, you'll need to enter the Length and Width.
  3. Calculate: After entering the required dimensions, click the "Calculate" button to compute the area of the selected shape.
  4. View Result: The calculated area will be displayed below the calculator interface in real-time.

Sample Screenshots of the Project:

Landing Page

Plane Shapes Option

Sample Calculation

How to Run?

  • Download the provided source code zip file.
  • Extract the downloaded zip file.
  • Open the html file and you are now ready to go!

Video Demonstration for Installation/Setup:


In conclusion, the Area of Plane Shapes Calculator stands as a testament to the intersection of simplicity and functionality in web-based tools. Its user-centric design and efficient calculation capabilities make it a valuable resource for individuals across various fields and expertise levels. Whether utilized for educational purposes, professional endeavors, or personal projects, this calculator streamlines the process of determining areas for a wide range of plane shapes. With its responsive interface and real-time results, users can rely on this tool to provide accurate and prompt solutions to their geometric challenges. As technology continues to evolve, tools like the Area of Plane Shapes Calculator exemplify the potential for digital innovations to enhance problem-solving and decision-making processes in diverse domains.

That's it! I hope this "Area of Plane Shapes Calculator Using HTML, CSS and JavaScript" will assist you on your programming journey, providing value to your current and upcoming projects.

For additional tutorials and free source codes, explore our website.

Enjoy Coding :>>

Note: Due to the size or complexity of this submission, the author has submitted it as a .zip file to shorten your download time. After downloading it, you will need a program like Winzip to decompress it.

Virus note: All files are scanned once-a-day by for viruses, but new viruses come out every day, so no prevention program can catch 100% of them.


1. Re-scan downloaded files using your personal virus checker before using it.
2. NEVER, EVER run compiled files (.exe's, .ocx's, .dll's etc.)--only run source code.

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