APY Calculator

The annual percentage yield is what a nominal rate actually earns once the interest starts earning interest, so 5 percent compounded monthly is worth 5.1162 percent over a year. Enter a rate and how often it compounds and the tool returns the APY, the rate per period and the ceiling that continuous compounding would reach. The second action runs it backwards, turning an advertised APY into the nominal rate behind it, and the third sets two accounts against each other and says which one pays more. APY is the figure that lets two accounts on different compounding schedules be compared honestly.

Calculator Type

The usual direction: a quoted rate and a compounding schedule in, the effective yield out.

Nominal Interest Rate (%) *

The stated or advertised rate before compounding is counted. Sometimes called the nominal rate or the coupon rate.

Compounding Frequency

Balance ($, optional)

Fill this in to see the yield in money over one year. The APY itself does not depend on it.

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Two rates on two different compounding schedules, which is the case APY exists to settle.

Account A Nominal Rate (%) *

Account A Compounding

Account B Nominal Rate (%) *

Account B Compounding

Balance ($, optional)

Fill this in to see the yield in money over one year. The APY itself does not depend on it.

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