APY Calculator
Calculate annual percentage yield from an interest rate and compounding frequency.
| Savings Details | Enter Value |
|---|---|
| Annual Interest Rate (%) | |
| Compounds Per Year |
How to Use the APY Calculator
Enter the nominal annual interest rate and compounding frequency to calculate the annual percentage yield, which reflects compounding over one year.
Practical Example
A 5% nominal rate compounded monthly produces an APY slightly above 5% because interest is added throughout the year.
Factors That Affect the Result
Compounding frequency, account fees, variable rates, taxes and deposit timing can affect real earnings.
Frequently Asked Questions
What is APY?
APY is the effective annual return after accounting for compounding.
Is APY the same as APR?
No. APR generally states an annual rate without the same compounding treatment used by APY.
Can APY change?
Yes, variable-rate accounts can change over time.
Related Tools
- APR Calculator
- Compound Interest Calculator
- Savings Interest Calculator
- CD Calculator
- Simple Interest Calculator
Understanding APY
Annual percentage yield expresses the effective annual growth of an account after taking compounding into consideration. This makes APY different from a simple stated interest rate when interest compounds more than once per year. For a nominal rate r compounded n times annually, APY can be calculated as (1 + r/n)^n − 1. More frequent compounding can produce a slightly higher APY when the nominal rate is the same. APY is useful for comparing deposit products on a common annual basis, but actual earnings can still depend on balance changes, fees, introductory rates, withdrawal rules and the time funds remain in the account. When comparing products, confirm whether the displayed rate is fixed or variable and whether minimum-balance requirements apply. A calculator provides a mathematical estimate and does not guarantee the future rate offered by a financial institution.