Many issuers use your card’s average daily balance to calculate credit card interest. Getting your average daily balance involves adding up the balance on your card from each day in the billing period and dividing that sum by the number of days in the billing period. Interest calculations proceed from there.

From good vs. bad rates to avoiding common pitfalls, credit card APR can significantly impact your financial health.

APR stands for annual percentage rate and, like your interest rate, it reflects how much borrowing money will cost you. The only difference? APR includes all the fees, too.

Whether you’re looking for your first credit card or you already have several, it’s not always easy to figure out how to choose the right credit card. With so many options available, it can be overwhelming to determine which credit card suits your needs.

It's helpful to know how interest is calculated so you can figure out how much you're paying in interest each month. Here's how credit card interest calculated.

It’s no surprise that credit card interest charges can add up. Some credit cards charge an APR, or annual percentage rate, that’s over 20 percent. However, 0 percent APR credit cards can offer a break from mounting interest charges by giving you the chance to pay down your balance without incurring interest for a certain period of time.