Finance

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APY Calculator.

Calculate effective annual yield from a nominal annual rate and compounding frequency.

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Effective annual percentage yield: 5.116%

Effective annual percentage yield

5.116%

FAQs

What does APY include?

APY reflects the effect of compounding at the entered frequency; product fees, taxes, and changing rates are not modeled.

Cite this calculator

Canonical URL: https://mathify.one/de/finance/apy

Cite as: Mathify. (2026). Rechner: APY. https://mathify.one/de/finance/apy

Use Cases

Compare savings accounts

Evaluate different savings accounts or CDs that advertise nominal rates with different compounding periods to see which offers the highest effective yield.

Example: A 5% nominal rate compounded daily yields an APY of about 5.13%, while compounded annually yields 5%.

Understand investment returns

Assess the effective annual return on investments like bonds or dividend reinvestment plans where interest or dividends are compounded.

Example: A bond with a 4% nominal rate compounded semi-annually has an APY of 4.04%.

Frequently Asked Questions

What is APY and how is it different from the nominal interest rate?
APY (Annual Percentage Yield) reflects the real rate of return after compounding. The nominal rate is the stated annual rate without compounding. APY is higher when compounding occurs more frequently, showing the true earnings on an investment or savings account.
How does compounding frequency affect the APY?
The more frequently interest is compounded (e.g., daily vs. annually), the higher the APY will be for the same nominal rate. This calculator lets you input the nominal rate and compounding frequency to see the effective annual yield.
Can I use this calculator for loans as well as savings?
Yes, the APY concept applies to any interest-bearing product. For loans, the effective annual rate (EAR) is similar, but APY is typically used for deposits. This calculator helps you compare the true cost or return of different nominal rates and compounding schedules.

Tips & Common Mistakes

Tips

  • Always input the nominal annual interest rate, not the periodic rate, to get the correct APY.
  • Choose the compounding frequency that matches your actual account or investment terms.
  • Use the APY to compare different financial products on an equal basis, regardless of their compounding schedules.
  • Remember that APY assumes the interest stays in the account and compounds; if you withdraw interest, your actual yield may be lower.

Common Mistakes to Avoid

  • Using the periodic interest rate (e.g., monthly rate) as the nominal annual rate, which leads to an incorrect APY.
  • Forgetting to adjust the compounding frequency when comparing products, which can make a lower nominal rate with more frequent compounding appear worse than it is.
  • Assuming APY is the same as the nominal rate when compounding is not annual.

Last updated: August 13, 2026