How to Calculate 1 Credit Card APR
'/%3E%3Ccircle cx='48' cy='39' r='19' fill='%23f2c9a5'/%3E%3Cpath d='M27 35c3-16 39-17 42 2-8-8-27-9-42-2z' fill='%23374151'/%3E%3Cpath d='M21 86c5-24 49-28 56 0z' fill='%232563eb'/%3E%3Ccircle cx='41' cy='41' r='2' fill='%23111827'/%3E%3Ccircle cx='55' cy='41' r='2' fill='%23111827'/%3E%3Cpath d='M42 52c4 3 9 3 13 0' stroke='%2392400e' stroke-width='3' fill='none' stroke-linecap='round'/%3E%3C/svg%3E)
Reviewed by Calculator Editorial Team
Calculating your credit card APR (Annual Percentage Rate) is essential for understanding your interest costs. This guide explains the formula, provides a calculator, and helps you interpret your APR.
What is APR?
APR stands for Annual Percentage Rate. It represents the annual cost of borrowing money, expressed as a percentage. For credit cards, APR is the interest rate charged on unpaid balances, calculated on a daily basis and compounded monthly.
APR is different from the interest rate you see on your statement. The interest rate is typically the daily rate, while APR converts that to an annual percentage.
How to Calculate APR
The formula to calculate APR is:
APR = (Daily Interest Rate × 365) × 100
Where:
- Daily Interest Rate - The interest charged each day on your unpaid balance
- 365 - The number of days in a year (assuming a non-leap year)
- 100 - Converts the decimal to a percentage
For example, if your credit card charges 0.01% interest per day, your APR would be:
APR = (0.01% × 365) × 100 = 36.5%
This means you would pay 36.5% interest annually on your unpaid balance.
APR vs. APY
APR and APY (Annual Percentage Yield) are often confused, but they measure different things:
| Term | Definition | Calculation |
|---|---|---|
| APR | The simple annual interest rate | (Daily Rate × 365) × 100 |
| APY | The effective annual rate including compounding | (1 + Daily Rate)^365 - 1) × 100 |
For credit cards, APR is typically higher than APY because it doesn't account for compounding. For savings accounts, APY is usually higher because it includes compounding.
Example Calculation
Let's say you have a credit card with a daily interest rate of 0.015%. Here's how to calculate the APR:
- Multiply the daily rate by 365: 0.015 × 365 = 5.5325
- Multiply by 100 to get the percentage: 5.5325 × 100 = 553.25%
- Round to a reasonable decimal place: 553.25% (or 553.3% if rounding to one decimal)
So, your APR would be 553.25%. This means you would pay 553.25% interest annually on your unpaid balance.
Note: APRs over 100% are common for credit cards because the interest is calculated on a daily basis and compounded monthly.
FAQ
A good APR for a credit card is typically below 20%. APRs above 20% are common for credit cards because they charge interest on daily balances and compound monthly.
APR determines how much interest you'll pay on your unpaid balance. A higher APR means you'll pay more interest over time. It's important to pay your balance in full each month to avoid interest charges.
No, APR is different from the daily interest rate. The daily rate is typically much lower, but APR converts that to an annual percentage that's easier to compare with other financial products.