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Savings calculator
Convert between nominal annual percentage rate (APR) and effective annual percentage yield (APY) for a selected compounding frequency.
How to read these results
These values are calculated from your current inputs. Check the input units and this calculator’s stated assumptions or included scope alongside the results.
Primary result: Converted annual rate
Supporting value: Rate per compounding period
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APR is a nominal annual rate, while APY includes the effect of compounding over the year. Fees, taxes, and irregular cash-flow timing are excluded.
APR to APY uses (1 + APR/n)^n - 1. APY to APR uses n × ((1 + APY)^(1/n) - 1), where n is the number of compounding periods per year.
Example: a 12% APR compounded monthly has a 1% monthly periodic rate and an APY of about 12.6825%.
Disclosure rules and fee treatment vary by product and jurisdiction. This calculator performs a mathematical compounding conversion and does not replace an institution's quoted product rate.