APY Calculator

Estimate annual percentage yield and interest from a stated nominal rate and compounding frequency.

Method checked 2026-09-15 · Methods & sources · Examples are estimates, not current offers or quotes.

Your inputs

Example values are editable assumptions. Enter your own numbers.

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Your estimate

Fill in the inputs and select Calculate. Results clear when you change an input so you can compare a fresh estimate.

How this calculator works

Converts the nominal annual rate to a rate per compounding period.

Calculates APY as (1 + nominal rate / compounds per year)^compounds per year − 1.

Applies the same periodic compounding for the selected number of years.

Worked example

Worked example: $1,000 at a 12.00% nominal rate compounded monthly grows to $1,126.83 after one year; the APY is 12.683%.

Common questions

Is APY the same as a nominal rate?

No. APY includes the effect of compounding over one year; a nominal rate does not.

Does this predict a bank account rate?

No. It uses the rate you enter and does not fetch or assume a current rate.