APY Calculator
Convert a nominal APR into effective APY for any compounding frequency and see the yearly growth.
Local processingAPY Calculator
What is APY Calculator?
APY Calculator converts a nominal annual percentage rate into the effective annual percentage yield. It shows how compounding frequency changes the real return on savings or debt.
How It Works
APY is calculated as (1 + APR / n)^n - 1, where n is the number of compounding periods per year. The tool also shows the growth of a sample balance.
Common Use Cases
- Comparing savings account offers
- Understanding the effect of monthly versus daily compounding
- Checking loan or card effective rates
- Explaining APR versus APY
Technical Details
Uses the standard effective-rate formula with JavaScript floating-point arithmetic. Results are estimates and exclude fees.
How to Use
Enter your input above. The result updates automatically. Use the copy button to copy the result.
Privacy
All processing happens in your browser. Your data is never uploaded to any server.
FAQ
What is the difference between APR and APY?
APR is the nominal annual rate, while APY includes the effect of compounding and is usually higher.
Is my data uploaded to a server?
No. Everything runs locally in your browser. Your input never leaves your device.
Does APY Calculator work on mobile?
Yes. The interface is responsive and works in modern mobile browsers without installing an app.