Build a Fixed Deposit Interest Calculator Using Amount and Time in Browser Using HTML5 & Javascript

index.html

<!DOCTYPE html>
<html>
  <head>
    <title>Fixed Deposit Calculator</title>
    <link
      rel="stylesheet"
      href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"
    />
  </head>
  <body>
    <div class="container">
      <h1 class="mt-4">Fixed Deposit Calculator</h1>
      <form id="fdCalculatorForm">
        <div class="form-group">
          <label for="principal">Principal Amount (INR):</label>
          <input type="number" class="form-control" id="principal" required />
        </div>
        <div class="form-group">
          <label for="interestRate">Interest Rate (%):</label>
          <input type="text" class="form-control" id="interestRate" required />
        </div>
        <div class="form-group">
          <label for="duration">Duration (Years):</label>
          <input type="number" class="form-control" id="duration" required />
        </div>
        <button type="submit" class="btn btn-primary">Calculate</button>
      </form>
      <div id="result" class="mt-4"></div>
    </div>

    <script>
      document
        .getElementById("fdCalculatorForm")
        .addEventListener("submit", function (event) {
          event.preventDefault();

          // Get user inputs
          const principal = parseFloat(
            document.getElementById("principal").value
          );
          const interestRate = parseFloat(
            document.getElementById("interestRate").value
          );
          const duration = parseFloat(
            document.getElementById("duration").value
          );

          // Calculate interest
          const interest = (principal * interestRate * duration) / 100;

          // Calculate total amount
          const totalAmount = principal + interest;

          // Display result
          document.getElementById("result").innerHTML = `
    <div class="alert alert-success">
      Interest: ${interest.toFixed(2)} INR<br>
      Total Amount: ${totalAmount.toFixed(2)} INR
    </div>
  `;
        });
    </script>
  </body>
</html>

<!DOCTYPE html>

<html>

<head>

<title>Fixed Deposit Calculator</title>

<link

rel="stylesheet"

href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"

</head>

<body>

<h1 class="mt-4">Fixed Deposit Calculator</h1>

<label for="principal">Principal Amount (INR):</label>

</div>

<label for="interestRate">Interest Rate (%):</label>

</div>

<label for="duration">Duration (Years):</label>

</div>

<button type="submit" class="btn btn-primary">Calculate</button>

</form>

</div>

document

.getElementById("fdCalculatorForm")

.addEventListener("submit", function (event) {

event.preventDefault();

// Get user inputs

const principal = parseFloat(

document.getElementById("principal").value

);

const interestRate = parseFloat(

document.getElementById("interestRate").value

);

const duration = parseFloat(

document.getElementById("duration").value

);

// Calculate interest

const interest = (principal * interestRate * duration) / 100;

// Calculate total amount

const totalAmount = principal + interest;

// Display result

document.getElementById("result").innerHTML = `

Interest: ${interest.toFixed(2)} INR<br>

Total Amount: ${totalAmount.toFixed(2)} INR

</div>

});

</script>

</body>

</html>

As you can see we have three fields where the user can enter the amount and time in years and also we can enter the interest rate and then it will show the interest amount you will get and the total amount.