Build a Mortgage Calculator Website

Introduction

Hello, developers! I’m thrilled to share my latest project: a Mortgage Calculator. This project is ideal for those who want to build a practical, interactive web application that calculates mortgage payments using HTML, CSS, and JavaScript. It’s a fantastic way to enhance your frontend development skills and create a useful tool for personal finance management.

Project Overview

The Mortgage Calculator is a web application designed to help users calculate their mortgage payments and total repayment amounts. With a clean and intuitive interface, this project showcases how to create a functional and interactive web tool that can be used in real-life scenarios.

Features

• Interactive Calculator: Users can input mortgage amount, term, and interest rate to get accurate calculations.
• Repayment Options: Offers options for both principal and interest payments and interest-only payments.
• Responsive Design: The application is fully responsive, ensuring it works well on both desktop and mobile devices.

Technologies Used

• HTML: Provides the structure for the Mortgage Calculator.
• CSS: Styles the application to ensure it is visually appealing and user-friendly.
• JavaScript: Adds interactivity and performs the mortgage calculations based on user input.

Project Structure

Here’s an overview of the project structure:

Mortgage-Calculator/
├── index.html
├── style.css
└── script.js

• index.html: Contains the HTML structure for the Mortgage Calculator.
• style.css: Includes CSS styles to create a modern and responsive design.
• script.js: Manages the interactive elements and performs the mortgage calculations.

Installation

To get started with the project, follow these steps:

1. Clone the repository:
   

   git clone https://github.com/abhishekgurjar-in/Mortgage-Calculator.git
   

2. Open the project directory:
   

   cd Mortgage-Calculator
   

3. Run the project:

   • Open the index.html file in a web browser to view the Mortgage Calculator.

Usage

1. Open the website in a web browser.
2. Input the mortgage amount, term, and interest rate into the respective fields.
3. Select the repayment option (Principal & Interest or Interest Only).
4. Click on the Calculate button to see the monthly and total repayments.
5. View the responsive design by resizing the browser window or opening the website on different devices.

Code Explanation

HTML

The index.html file defines the structure of the Mortgage Calculator, including input fields, buttons, and result display areas. Here’s a snippet:

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  4f2fb0231f24e8aef524fc9bf9b9874f
  b2386ffb911b14667cb8f0f91ea547a7Mortgage Calculator6e916e0f7d1e588d4f442bf645aedb2f
  7f134404bc2b8d1ed3a425d6afe2c978
  468dcf7b0ee61aef03af1a1fbe6725fc
  5de102113aede4703971b3b780c58efb2cacc6d41bbb37262a98f745aa00fbf0
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  4883ec0eb33c31828b7c767c806e14c7
    8f9e4409b06fde1ff1d3a80f075ca0ed
      641e0de5ce410c86c3a093b6b324b956
        4a249f0d628e2318394fd9b75b4636b1Mortgage Calculator473f0a7621bec819994bb5020d29372a
        e388a4556c0f65e1904146cc1a846beeCalculate your mortgage payments easily with this interactive tool. Enter the details below to find out your monthly and total repayments.94b3e26ee717c64999d7867364b1b4a3
        bcab94f2ca096ade435e1863de1ea519
          45a2772a6b6107b401db3c9b82c049c2£54bdf357c58b8a65c66d7c19c8e4d1142ea3a3bae86ada6baf8b9f857a543fd6
        16b28748ea4df4d9c2150843fecfba68
        bcab94f2ca096ade435e1863de1ea519
          45a2772a6b6107b401db3c9b82c049c2Years54bdf357c58b8a65c66d7c19c8e4d114eb6a658a273a32be55ba8e4c3812de60
        16b28748ea4df4d9c2150843fecfba68
        bcab94f2ca096ade435e1863de1ea519
          45a2772a6b6107b401db3c9b82c049c2%54bdf357c58b8a65c66d7c19c8e4d1145bb5c6d696c1e55eb922bd74f02d40ac
        16b28748ea4df4d9c2150843fecfba68
        9bc5bd43551c0ff923b7463d942d59aa
          ec4788260285a3713bf6e72f0acf6656
          a021b71baff35f3a3e73996936aa8149Principal & Interest8c1ecd4bb896b2264e0711597d40766c
          a67b7ecc341b8f8d33e5685ccf845368
          0e8f84f8467275b8b961b8a801af8357Interest Only8c1ecd4bb896b2264e0711597d40766c
        16b28748ea4df4d9c2150843fecfba68
        7c82f1f5975861bffe14fa4bc99556b6Calculate65281c5ac262bf6d81768915a4a77ac0
        6b8ba7a231df4804cbb38398799ced2d
          e388a4556c0f65e1904146cc1a846beeFill out the form to see your results.94b3e26ee717c64999d7867364b1b4a3
        16b28748ea4df4d9c2150843fecfba68
        25703264c6c8fab5a3445eb06e3f6f7d
          4a249f0d628e2318394fd9b75b4636b1£0.00473f0a7621bec819994bb5020d29372a
          3f7b3decd2dcafb07b84d2d3985d9f40Total Repayment: £0.000f6dfd1e3624ce5465eb402e300e01ae
        16b28748ea4df4d9c2150843fecfba68
      16b28748ea4df4d9c2150843fecfba68
    16b28748ea4df4d9c2150843fecfba68
    ffd6ba4147bda351239915f463e46e38
      e388a4556c0f65e1904146cc1a846beeMade with ❤️ by Abhishek Gurjar94b3e26ee717c64999d7867364b1b4a3
    16b28748ea4df4d9c2150843fecfba68
  16b28748ea4df4d9c2150843fecfba68
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73a6ac4ed44ffec12cee46588e518a5e

CSS

The style.css file styles the Mortgage Calculator, making it attractive and easy to use. Below are some key styles:

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 16px;
  background-color: hsl(202, 86%, 94%);
}

.container {
  margin: auto;
  max-width: 1440px;
  background-color: hsl(202, 86%, 94%);
}

.box {
  border-radius: 20px;
  background-color: whitesmoke;
  max-width: 900px;
  margin: 160px auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.left-box {
  width: 50%;
}

.left-box h1 {
  font-size: 2.5rem;
}

.left-box p {
  font-size: 1rem;
}

.input-box {
  width: 80%;
  border: 1px solid black;
  border-radius: 4px;
  display: flex;
  align-items: center;
}

.input-box span {
  width: 20px;
}

.input-box input {
  width: 70%;
  height: 100%;
  border: none;
}

.calculate {
  background-color: yellow;
  width: 50%;
  border-radius: 8px;
  height: 2.5rem;
  margin: 15px;
}

.empty-result {
  border-radius: 20px;
  padding: 10px;
  color: white;
  background-color: #1b3547;
}

.filled-result {
  display: none;
}

.footer {
  margin-top: 100px;
  text-align: center;
}

@media (max-width: 800px) {
  .box {
    flex-direction: column;
    align-items: center;
    gap: 100px;
  }
}

JavaScript

The script.js file contains the logic for calculating mortgage payments based on user input. Here’s a snippet:

document.addEventListener('DOMContentLoaded', () => {
    const calculateButton = document.querySelector('.calculate');
    const emptyResult = document.querySelector('.empty-result');
    const filledResult = document.querySelector('.filled-result');
    const mortgageAmountInput = document.querySelector('.MortgageAmount');
    const mortgageTermInput = document.querySelector('.MortgageTerm');
    const interestRateInput = document.querySelector('.Interest');
    const repaymentOption = document.querySelector('#Repayment');
    const interestOnlyOption = document.querySelector('#InterestOnly');
    const monthlyRepaymentElement = filledResult.querySelector('h1');
    const totalRepaymentElement = filledResult.querySelector('h4');

    calculateButton.addEventListener('click', () => {
      const principal = parseFloat(mortgageAmountInput.value);
      const years = parseFloat(mortgageTermInput.value);
      const annualInterestRate = parseFloat(interestRateInput.value) / 100;
      const months = years * 12;
      let monthlyRepayment;
      let totalRepayment;

      if (repaymentOption.checked) {
        const monthlyInterestRate = annualInterestRate / 12;
        monthlyRepayment = (principal * monthlyInterestRate) / (1 - Math.pow(1 + monthlyInterestRate, -months));
        totalRepayment = monthlyRepayment * months;
      } else if (interestOnlyOption.checked) {
        monthlyRepayment = (principal * annualInterestRate) / 12;
        totalRepayment = principal + (monthlyRepayment * months);
      }

      if (!isNaN(monthlyRepayment) && !isNaN(totalRepayment)) {
        monthlyRepaymentElement.textContent = `£${monthlyRepayment.toFixed(2)}`;
        totalRepaymentElement.textContent = `£${totalRepayment.toFixed(2)}`;
        emptyResult.style.display = 'none';
        filledResult.style.display = 'block';
      } else {
        alert('Please enter valid numbers for all fields.');
      }
    });
});

Live Demo

You can check out the live demo of the Mortgage Calculator project here.

Conclusion

Creating the Mortgage Calculator was a valuable exercise in applying frontend development skills to build a practical tool. This project demonstrates how to create an interactive and responsive web application that can be used for financial planning. I hope it inspires you to build your own tools and enhance your web development skills. Happy coding!

Credits

This project was developed as part of my continuous learning journey in web development.

Author

• Abhishek Gurjar
  • GitHub Profile

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