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APY Calculator

Convert a nominal annual rate into an effective annual yield.

Enter your assumptions

Change a number. Your estimate updates automatically.

APY includes the effect of reinvesting earnings at the selected compounding frequency.

Your estimated future balance
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Your money over time

Constant-rate illustration. Taxes and fees are excluded. Returns can vary or be negative; this is not a guaranteed outcome.

View yearly breakdown
Year-end projections (rounded for display)

How this tool works

APY = [(1 + r/n)^n − 1] × 100%. This assumes earnings are reinvested, the rate stays constant, and there are no fees.

Try an example

For example, a nominal rate of 5% compounded monthly produces an APY slightly above 5%. APY is a rate, so this tool does not require a currency or starting balance.

Questions & assumptions

What does the result include?

This is a mathematical projection using the inputs shown. It excludes taxes, fees, and changes in rates.

Can I export the result?

Yes. Download the projection as CSV or print the result. Changing an input recalculates the output.

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