APR ← APY
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
inverso
About this calculator
The APR to APY calculator is a useful tool for understanding the difference between annual effective and nominal interest rates. It allows you to easily convert the Annual Percentage Rate (APR) to the Annual Percentage Yield (APY), taking into account the compounding frequency.
The formula used for this conversion is APR = n·((1+APY)^(1/n) − 1), where n is the number of times interest is compounded per year. This formula is crucial for understanding how compound interest rates affect the value of investments or loans over time.
Converting APR to APY is particularly important in financial contexts, such as investments, loans, and financial products that involve compound interest. Knowing the effective interest rate enables investors to make more informed decisions about their investments and borrowers to better understand the true cost of their loans.
Furthermore, it is essential to be cautious when comparing different financial offers, as nominal interest rates may not reflect the effective interest rate due to compounding frequency. Using this calculator can help avoid calculation errors and provide a clear view of the financial implications of your decisions.
Frequently asked questions
What is APR and APY?
APR (Annual Percentage Rate) is the nominal interest rate, while APY (Annual Percentage Yield) is the effective interest rate, considering compounding frequency.
Why is it important to convert APR to APY?
Knowing the effective interest rate enables investors to make more informed decisions and borrowers to better understand the true cost of their loans.
How does compounding frequency affect the interest rate?
Compounding frequency can significantly increase the effective interest rate, as interest is compounded more frequently.
Can I use this calculator to compare different financial offers?
Yes, this calculator can help compare different financial offers, considering the effective interest rate and compounding frequency.
Is the conversion of APR to APY only important for investments?
No, the conversion of APR to APY is important for any financial product that involves compound interest, including loans and savings accounts.