APY Calculator

Calculate annual percentage yield from APR and compounding frequency.
%

APY

5.127%

APY − APR

+0.1267%

Monthly Interest Earned

$10,000.00$42.72/mo
$50,000.00$213.61/mo
$100,000.00$427.23/mo

Use the APY Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

How It Works

Our APY Calculator helps you understand the true annual return on your investments or the actual cost of your loans by converting the Annual Percentage Rate (APR) into the Annual Percentage Yield (APY). This is crucial because APY accounts for compounding, giving you a more accurate picture of your money's growth or debt accumulation. For instance, with inflation potentially moderating to 2.5% by mid-2026 according to some forecasts, understanding your APY ensures your returns are genuinely outpacing the cost of living.

The methodology employed by this calculator uses the following formula: APY = (1 + (APR / n))^n - 1. Here, 'APR' represents the Annual Percentage Rate, and 'n' denotes the number of compounding periods per year. This formula effectively quantifies the impact of interest being earned on previously accumulated interest, providing a holistic view of your investment's performance.

A common mistake is confusing APR directly with the actual return; always consider the compounding frequency. Be mindful that while a higher APY is generally better for investments, it means a higher effective cost for loans. Also, remember that this calculator assumes a fixed APR and consistent compounding over the year, which might not always be the case in variable-rate scenarios.

Example: Savings Account Growth in 2026

  1. 1 Imagine you find a new savings account in early 2026 offering an APR of 4.75% compounded monthly. You deposit $10,000.
  2. 2 Using the formula, APY = (1 + (0.0475 / 12))^12 - 1. This calculates the effective annual return considering monthly compounding.
  3. 3 The calculated APY for this savings account is approximately 4.85%.
  4. 4 This means that while the stated APR is 4.75%, your $10,000 will effectively grow as if it earned 4.85% over the year due to the monthly compounding. By the end of 2026, your initial $10,000 would be worth approximately $10,485.00.

Source: SEC · Last updated: April 2026

Frequently Asked Questions

What is the difference between APR and APY?
APR is the annual interest rate without compounding. APY includes the effect of compounding and is always equal to or higher than APR. A 5% APR compounded monthly yields a 5.12% APY.
How is APY calculated?
APY = (1 + r/n)^n - 1, where r is the annual rate and n is the number of compounding periods per year. More frequent compounding (daily vs monthly) produces a slightly higher APY.
Why do savings accounts advertise APY instead of APR?
Banks advertise APY for savings accounts because it appears higher than APR due to compounding. For loans, they advertise APR because it appears lower. Always compare APY to APY or APR to APR for accurate comparisons.

You might also need

Compound Interest Calculator — See Your Money Grow Over Time

Calculate compound interest with regular contributions and see how your money grows with daily, monthly, or annual compounding. Free, instant results and charts.

Inflation Calculator

Calculate the impact of inflation on purchasing power over time. See how much past dollars are worth today.

Net Worth Calculator

Calculate your net worth by adding up assets (savings, investments, property) and subtracting liabilities (loans, credit cards).