APY Calculator - Convert APR to APY and Back, With Earnings
APY Calculator
See the true yearly return once compounding is counted
Both Directions
Turn a quoted APR into the APY you actually earn, or work back from an APY to the APR behind it.
Any Compounding
Annual, semiannual, quarterly, monthly, weekly, daily or continuous: see how more frequent compounding lifts the yield.
Earnings Preview
Enter a deposit and a number of years to see the final balance and the interest earned.
Full Privacy
Everything is calculated in your browser.
APR Versus APY
APR is the simple yearly rate; APY includes the effect of compounding, meaning interest earning interest. A 5% APR compounded monthly grows to an APY of 5.116%, and compounded daily to 5.127%. Savings accounts advertise APY because it is the higher and more honest figure for what you earn, while loans usually quote APR.
The formula is APY = (1 + APR ÷ n)ⁿ − 1, where n is the number of compounding periods a year, and with continuous compounding it is eAPR − 1. The gap widens with higher rates and more frequent compounding, so it matters most for high-yield accounts and credit cards.
Key Takeaways
- Exact: Results are checked against independent calculations.
- Round trips: Converting there and back returns the rate you started with.
- Optional deposit: Leave the deposit empty to see rates only.