Overview of the Responsive EMI Calculator
Purpose:
The purpose of this EMI (Equated Monthly Installment) Calculator is to help users easily calculate their monthly EMI payments for a loan based on the loan amount, annual interest rate, and loan tenure. This tool is particularly useful for individuals who are planning to take a loan and want to understand their monthly repayment obligations.

Features:
Responsive Design: The calculator is designed to be fully responsive, ensuring it looks good and functions well on devices of all sizes, including phones, tablets, and laptops.
User-Friendly Interface: The interface is clean and easy to navigate, with clear labels and input fields.
Default Values: Default loan amounts are provided for quick selection, making it easier for users to input common values without typing.
Dynamic Chart: A pie chart dynamically displays the breakdown of the principal loan amount and the total interest, helping users visualize their payment structure.
Real-Time Calculation: Calculations are updated in real-time whenever the user changes input values or presses the "Enter" key.
Detailed Results: Detailed breakdown of the EMI calculation, including total payment and total interest, is provided.
How It Works:
Input Fields: Users enter the loan amount, annual interest rate, and loan tenure in the respective input fields. Default values are provided below the loan amount input for quick selection.
Calculation Trigger:
Users can click the "Calculate" button to trigger the calculation.
Alternatively, pressing the "Enter" key will also trigger the calculation.
EMI Calculation: The calculator uses the standard EMI formula:
𝐸
𝑀

𝐼

𝑃
×
𝑟
×
(
1
+
𝑟
)
𝑛
(
1
+
𝑟
)
𝑛
−
1
EMI=
(1+r)
n
−1
P×r×(1+r)
n

​

where
𝑃
P is the loan amount,
𝑟
r is the monthly interest rate, and
𝑛
n is the total number of monthly installments.
Result Display: The calculated EMI amount is displayed prominently. Detailed information including the total payment, total interest, loan amount, annual interest rate, and loan tenure is shown below.
Dynamic Chart: A pie chart is generated to visually represent the proportion of the principal loan amount to the total interest. The chart is refreshed dynamically whenever the calculation is triggered.
Responsive Layout:
On larger screens (e.g., laptops), the calculator and the result (including the chart) are displayed side by side.
On smaller screens (e.g., phones), the calculator is displayed on top, followed by the detailed results and the chart below.
Code Explanation:
HTML Structure: The HTML structure includes input fields for loan amount, annual interest rate, and loan tenure. Default values are provided as clickable options. The calculation button and result display area are also included.
CSS Styling: The CSS ensures a clean and responsive layout, adjusting the display based on screen size.
JavaScript Functionality:
The calculateEMI function performs the EMI calculation, updates the result display, and refreshes the chart.
The setDefaultValue function allows users to quickly set the loan amount using the default values.
The formatRupee function formats numbers as Indian Rupees.
An event listener is added to trigger the calculation when the "Enter" key is pressed.
Conclusion:
This EMI Calculator is a robust, user-friendly tool designed to help users quickly and accurately calculate their monthly loan payments. Its responsive design, real-time calculations, and visual representation of data make it an invaluable resource for anyone considering a loan.