APY Calculator

Calculate annual percentage yield and compound interest.

Formula & Methodology

APY = (1 + r/n)^n − 1, where r is the nominal annual rate and n is compounding periods per year.

Worked Example

A 5% nominal rate compounded monthly yields an APY of about 5.12%.

Frequently Asked Questions

What is APY?

Annual Percentage Yield is the effective yearly return after compounding, making it the best figure for comparing savings products.

How does compounding affect APY?

More frequent compounding raises the APY for the same nominal rate, though the difference is small at low rates.

Is APY the same as APR?

No. APR is the cost of borrowing and usually excludes compounding, while APY is the yield on savings and includes compounding.

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