Interest
APY calculator
Convert a nominal annual rate and compounding frequency into APY.
How to use this calculator
Enter Nominal annual rate and Compounds per year. Convert a nominal annual rate and compounding frequency into APY. The answer updates when you change an input.
Understanding the result
APY includes within-year compounding, making rates with different frequencies comparable.
Common questions
What assumptions does this result use?
The nominal rate and compounding frequency remain constant for one year.
Are intermediate values rounded?
No. The calculation retains JavaScript number precision internally and formats only the displayed result unless the stated method requires a discrete whole value.