Find the real annual percentage yield (APY) on a savings account or CD. Enter the nominal rate and how often it compounds, and see the APY plus the interest you'd earn.
Estimate only. APY assumes the rate and balance stay constant for a year and interest is reinvested. Real accounts can change rates and have fees.
The nominal rate (APR) is the stated rate; the APY is what you actually earn once compounding is included. The more often interest compounds, the higher the APY. At a 5% nominal rate compounded monthly, the APY is about 5.12%.
APY = (1 + rate ÷ n)ⁿ − 1
…where n is the number of compounding periods per year.
APR is the simple stated rate; APY includes the effect of compounding, so it's the true yearly return. Compare savings accounts on APY, not the nominal rate.
APY = (1 + r/n)ⁿ − 1, where r is the nominal annual rate and n is how many times it compounds per year. This calculator does it for you and shows the interest earned on your balance.
Related: compound interest calculator · savings goal calculator · investing growth benchmark.
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Yes. The APY Calculator is completely free, runs in your browser, and never asks for a signup, email, or download. Enter your numbers and the result updates instantly.
It uses standard formulas and recalculates the moment you change a value, so the math is exact for the inputs you enter. Treat the result as a reliable planning estimate; for decisions with legal or tax consequences, confirm the figures with a qualified professional.
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Last reviewed: September 2026. Free to use, no signup — APY Calculator by ToolWise Digital.
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