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Effective Annual Rate (EAR) Calculator

Calculate the Effective Annual Rate (EAR) or Annual Percentage Yield (APY) from any nominal interest rate and compounding frequency using our free tool.

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Effective Annual Rate Summary
Nominal Rate (APR) 8.00%
Compounding Periods Monthly (12 times/yr)
Total Interest Difference +0.30%
Effective Annual Rate (EAR / APY)

8.30%

About the Effective Annual Rate (EAR) Calculator

Our free Effective Annual Rate (EAR) Calculator helps investors and borrowers determine the true annualized return or cost of an interest-bearing account or loan. When interest compounds more frequently than once a year, the actual rate of return—known as the Effective Annual Rate (EAR) or Annual Percentage Yield (APY)—is higher than the stated nominal interest rate.

Why Effective Annual Rate Matters

The nominal interest rate (or APR) does not account for the compounding effect within a year. By converting a nominal rate to its effective annual rate, you can accurately compare financial products with different compounding frequencies (such as monthly vs. quarterly vs. daily compounding).

How to Use the Calculator

Simply enter your nominal rate and compounding frequency:

  • Nominal Interest Rate: The stated annual percentage rate (p.a.) of the investment or loan.
  • Compounding Frequency: Choose how often interest is calculated and added per year (annually, semi-annually, quarterly, monthly, or daily).

Click the Calculate EAR button to instantly view your true effective annual rate and percentage yield difference.

Frequently Asked Questions (FAQs)

What is the difference between APR and EAR?
APR (Annual Percentage Rate) is the nominal interest rate without taking compounding into account, whereas EAR (Effective Annual Rate) includes the compounding effect over the course of a year.
Is EAR the same as APY?
Yes. Effective Annual Rate (EAR) and Annual Percentage Yield (APY) refer to the exact same financial concept when applied to savings and investments.
Why does more frequent compounding increase EAR?
More frequent compounding means interest is added to the principal sooner, allowing your money to earn interest on interest more often throughout the year.