Westpac Credit Card Interest Calculator

How to Use This Calculator

To calculate your Westpac credit card interest charges:

1. Enter your current credit card balance in the "Current Balance" field.
2. Enter your credit card's interest rate (APR) in the "Interest Rate" field.
3. Select the billing cycle period from the dropdown menu.
4. Click the "Calculate" button to see your estimated interest charges.

The calculator will display your estimated interest charges based on the information you've entered. You can also view a chart showing your interest charges over time.

Formula Used

The calculator uses the following formula to calculate interest charges:

Where:

• Current Balance - Your current credit card balance
• Daily Interest Rate - Your credit card's interest rate divided by 365
• Number of Days - The number of days in your billing cycle

For example, if your current balance is $1,000, your interest rate is 18% APR, and your billing cycle is 30 days, the calculator will calculate your interest charges as follows:

Worked Example

Let's say you have a Westpac credit card with a balance of $1,500 and an interest rate of 20% APR. Your billing cycle is 30 days. Here's how to calculate your interest charges:

1. Enter $1,500 in the "Current Balance" field.
2. Enter 20 in the "Interest Rate" field.
3. Select "30 days" from the dropdown menu.
4. Click the "Calculate" button.

The calculator will display your estimated interest charges as $12.45.