APY Calculator

Calculate the Annual Percentage Yield (APY) on your investments and savings accounts. APY shows the real rate of return on your investment, taking into account the effect of compounding interest over time.

How to Use This APY Calculator

1. Enter the nominal interest rate (APR) as a percentage
2. Select how frequently the interest is compounded
3. Enter your principal investment amount
4. Specify the time period in years
5. Click "Calculate APY" to see your results and comparison table

Understanding APY

APY (Annual Percentage Yield) represents the total amount of interest you earn on an account over one year, accounting for compound interest. Unlike APR (Annual Percentage Rate), which doesn't account for compounding, APY gives you a more accurate picture of your actual returns.

The APY Formula

APY is calculated using the following formula:

APY = (1 + r/n)^n - 1

• r = nominal interest rate (as a decimal)
• n = number of compounding periods per year

For continuous compounding: APY = e^r - 1

Why Compounding Frequency Matters

The more frequently interest is compounded, the higher your APY will be. Daily compounding will yield slightly better returns than monthly compounding, which in turn is better than annual compounding, even with the same nominal interest rate.

Disclaimer

This calculator is for educational and informational purposes only. Always verify calculations with your financial institution and consult with a qualified financial advisor before making investment decisions.