What this calculator does
Convert an effective annual interest rate to an equivalent nominal annual rate for a selected compounding frequency.
How it works
The calculator evaluates nominal rate j = m[(1+EAR)^(1/m) − 1]. Inputs are checked before calculation, and invalid values such as zero denominators or out-of-range selections produce a clear error instead of a misleading result.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
2-
?effectiveAnnualRate=Effective annual ratePercentage · Required · Default: 6.1678
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?compoundsPerYear=Compounds per yearNumber · Required · Default: 12
Outputs
3-
nominalAnnualRateNominal annual ratePercentage · Primary output
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periodicRatePeriodic ratePercentage
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effectiveCheckRecomputed effective annual ratePercentage
Inputs and results
The inputs are Effective annual rate, Compounds per year. Results include Nominal annual rate, Periodic rate, Recomputed effective annual rate.