APY Calculator - Annual Percentage Yield & Savings Interest Calculator
Calculate your true Annual Percentage Yield (APY) with our free tool. Compare daily vs. monthly compounding, understand APR to APY conversion, and see how much your savings will earn.
Yield Strategy
"Interest on interest. High compounding frequency transforms a modest nominal rate into a powerful effective yield over time."
Yield Ready
Select your interest rate and compounding frequency to reveal your true annual percentage yield.
APY Calculator - Annual Percentage Yield & Savings Interest Calculator
Calculate your true Annual Percentage Yield (APY) with our free tool. Compare daily vs. monthly compounding, understand APR to APY conversion, and see how much your savings will earn.
What is APY?
Annual Percentage Yield (APY) is the real rate of return earned on an investment, taking into account the effect of compounding interest. Unlike simple interest, APY calculates the interest earned on both the principal and the interest accumulated over time.
Compounding Impact
The more frequently your money compounds—daily, monthly, or quarterly—the higher your effective yield will be.
The APY Formula
APY = (1 + r/n)^n - 1Where 'r' is the stated annual interest rate and 'n' is the number of compounding periods per year.
Investment Scenarios
Savings Accounts
A 4% nominal rate compounded monthly results in a 4.07% APY.
Certificates of Deposit (CDs)
Compounding daily on a CD can significantly increase your return over long periods compared to annual compounding.