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APR to APY Calculator

Convert a nominal APR to APY using a specified compounding frequency.

Free to use
Runs in your browser
Level A · Standard formula
Last reviewed 2026-08-16

Calculator guide

How to use the APR to APY Calculator

Convert a nominal APR to APY using a specified compounding frequency. Enter the requested values and select Calculate. The result and supporting values are produced locally in your browser.

Formula

APY = (1 + APR ÷ n)^n − 1

Worked example

A 5% APR compounded monthly converts to an APY of about 5.116%.

What to keep in mind

This assumes periodic compounding with no fees.

Methodology

This calculator uses deterministic arithmetic and performs the calculation locally in your browser. Verify assumptions, units, and source values for your specific use case.

Review standard: Level A · Standard formula. How calculator reviews work.

Frequently asked questions

What does this calculator calculate?

Convert a nominal APR to APY using a specified compounding frequency.

How is the result calculated?

APY = (1 + APR ÷ n)^n − 1.

Can I use the result for an important decision?

Use the result as a calculation aid and verify the inputs, assumptions, and applicable professional or regulatory requirements before relying on it for an important decision.

Does CalculateMeasure store the values I enter?

The calculator performs its arithmetic in your browser. The calculator itself does not need to send your entered values to a server to produce the result.