Credit Card Interest Formula:
Where:
\( P \) = Principal balance (currency unit)
\( R \) = Monthly interest rate (APR / 12, as decimal)
\( I \) = Interest (currency unit)
From: | To: |
Credit card interest is the cost of borrowing money on your credit card. It's calculated based on your outstanding balance and the annual percentage rate (APR) set by your credit card issuer.
The calculator uses the simple interest formula:
Where:
Explanation: The APR is converted to a monthly rate by dividing by 12, then multiplied by your balance to determine the interest charge for that month.
Details: Understanding how interest is calculated helps you make informed decisions about paying down debt and comparing credit card offers.
Tips: Enter your current credit card balance and the APR from your card agreement. The calculator will show your estimated monthly interest charge.
Q1: Is this how credit cards actually calculate interest?
A: Most cards use daily periodic rates, but this monthly calculation gives a good estimate for planning purposes.
Q2: How can I reduce my credit card interest?
A: Pay your balance in full each month, negotiate a lower APR, or transfer balances to lower-rate cards.
Q3: What's a typical credit card APR?
A: Rates typically range from 12% to 25% APR, depending on creditworthiness and card type.
Q4: Does this include compound interest?
A: This shows simple monthly interest. Actual charges may compound if you don't pay in full.
Q5: How accurate is this calculator?
A: It provides a good estimate, but check your card's terms for exact calculation methods.