Hourcrunch · every number comes with its receipt
APY Calculator
See the yield a rate really earns in a year. Type a rate and how often it compounds; the receipt prints the APY and the formula behind it. No ads on this page.
Add a deposit and a term to see the interest it would earn. Calculated on this device.
RATE TO APY
Enter a rate to see its APY.
How APY works
APY counts interest earned on interest. A rate compounded daily earns a little more than the same rate paid once a year, and the APY is the single figure that lets you compare them. Banks must quote it under the Truth in Savings rules (Regulation DD).
The formula: APY = (1 + rate ÷ periods per year) to the power of the periods per year, minus 1. Daily compounding uses 365 periods.
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