The Ultimate Guide to Credit Cards
Wednesday, July 28, 2021

How to Calculate APR on a Credit Card — 3 Easy Steps

How To Calculate Apr On A Credit Card

credit card advice

Ashley Dull
By: Ashley Dull
Updated: May 27, 2020
Advertiser Disclosure

Banks are notorious for making numbers complicated. Even something as seemingly simple as your credit card’s annual percentage rate (APR) becomes complex when trying to calculate how banks get that number. But not to fear — learning how to calculate APR on a credit card is possible, and we’ll show you how.

As a responsible consumer, you’re rightfully concerned as to how this perplexing number determines what you’re paying in interest charges. We’ve broken it all down for you as simply as possible and will show you:

  1. Three simple steps for calculating your APR
  2. How to pay no interest at all with a balance transfer
  3. The best balance transfer cards available today

We’ll take you through step by step and explain the hows and whys of each. Let’s get started with calculating your APR.

3 Steps to Calculate Your APR

It’s actually quite easy once you know the equation, which we’ll explain here.

1. Find Your Average Daily Periodic Rate

Your Average Daily Periodic Rate can be found on the bottom of your monthly statement. We’ll call it ADPR. This number will be very low and may not seem like much, but this is what you are being charged in interest on average daily. We’ll touch more on this in step 2, but for the purpose of this calculation, we’ll assume it’s .04654.

2. Multiply ADPR By 365

Take the ADPR (.04654) and multiply it by 365, which represents days in a year. You use the number of days in a year because you don’t actually get charged an APR once a year, but rather your interest compounds daily. Your ADPR represents what you’re being charged each day and is determined by your outstanding balance. Banks use the average balance over the entire billing cycle.

(.04654)(365) = 16.987

Note: Some credit card issuers use 360 instead of 365, according to the CFPB.

3. View Your APR

Round that number up and voila! 16.99% is your APR. To reiterate, the calculation is:

(ADPR)(365) = APR

See, wasn’t that easy?

Transfer the Balance and You Could Pay $0 Interest

If you’ve done the math and are now displeased with what you’re seeing, there’s a way for you to stop paying interest altogether for a while. It’s called a 0-percent intro APR, and some cards offer them for up to 18 months.

This works by applying for a new card and transferring your current balance to the new card. You’ll receive up to 18 months of an interest-free balance AND most of the cards even offer 0 percent interest on purchases. This means everything charged to the new card will also be interest free for a while, depending on your agreement.

The Best Balance Transfer Credit Cards Available

Our experts are always looking for the best balance transfer cards, as they’re such a popular option among consumers today who are sick of paying sky-high interest rates. Granted, many factors determine the interest you’re being charged, but if you have good credit, you’ll likely qualify for one of these cards.

Below are a few of our experts’ top picks, but to see the full list, visit our balance transfer review page.

Wells Fargo Platinum card Review

at the issuer'ssecure website




  • 0% intro APR for 18 months from account opening on purchases and qualifying balance transfers, then a 16.49% to 24.49% variable APR; balance transfers made within 120 days qualify for the intro rate and fee
  • $0 Annual Fee
  • Get up to $600 protection on your cell phone (subject to $25 deductible) against covered damage or theft when you pay your monthly cellular telephone bill with your Wells Fargo Platinum card
  • Easy access to your FICO® Credit Score with Wells Fargo Online®
  • Monitor your spending, purchases and any suspicious activity with text and email alerts and notifications
  • Convenient tools to help create a budget and manage your spending with My Money Map
  • Select "Apply Now" to learn more about the product features, terms and conditions
Intro (Purchases)
Intro (Transfers)
Regular APR
Annual Fee
Credit Needed
0% intro APR for 18 months from account opening
0% intro APR for 18 months on qualifying balance transfers
16.49%-24.49% (Variable)




  • Earn cash back twice! Earn 2% on every purchase with unlimited 1% cash back when you buy, plus an additional 1% as you pay for those purchases.
  • To earn cash back, pay at least the minimum due on time
  • Balance Transfer Offer: 0% intro APR on Balance Transfers for 18 months. After that, the variable APR will be 13.99% - 23.99%, based on your creditworthiness. Balance Transfers do not earn cash back and will have a fee of either $5 or 3% of the amount of each transfer, whichever is greater.
  • If you transfer a balance, interest will be charged on your purchases unless you pay your entire balance (including balance transfers) by the due date each month.
  • 24/7 access to customer service representatives
  • $0 annual fee
Intro (Purchases)
Intro (Transfers)
Regular APR
Annual Fee
Credit Needed
0% for 18 months
13.99% - 23.99% Variable
BankAmericard® Credit Card Review

at Bank Of America'ssecure website




  • 0% Intro APR for 18 billing cycles for purchases, and for any balance transfers made in the first 60 days, then a variable APR will apply
  • An optional overdraft protection service is available to help prevent declined purchases, returned checks or other overdrafts when you link your eligible Bank of America® checking account to your credit card. Transfer fees may apply.
  • No penalty APR. Paying late won't automatically raise your interest rate (APR). Other account pricing and terms apply.
  • Access your FICO® Score for free within Online Banking or your Mobile Banking app
  • No annual fee
Intro (Purchases)
Intro (Transfers)
Regular APR
Annual Fee
Credit Needed
0% Intro APR for 18 billing cycles
0% Intro APR for 18 billing cycles (for balance transfers made in the first 60 days)
12.99% - 22.99% (Variable)

Final Advice

By understanding your APR, you’ll be able to comprehend how interest is calculated and tacked on to your monthly bill. This should prompt you to pay your balance off every month because those interest fees can have a considerable impact on budgets. However, if you carry a balance, hopefully by now you’ve decided you’re not going to settle for paying high interest (or any interest!) any longer and are ready to transfer that balance to a 0 percent intro APR card that will treat you better. Also, don’t forget how important it is to make your payments on time every month — having a history of on-time payments is one of the most important factors used when determining your credit score.

Advertiser Disclosure is a free online resource that offers valuable content and comparison services to users. To keep this resource 100% free, we receive compensation from many of the offers listed on the site. Along with key review factors, this compensation may impact how and where products appear across the site (including, for example, the order in which they appear). does not include the entire universe of available offers. Editorial opinions expressed on the site are strictly our own and are not provided, endorsed, or approved by advertisers.