Using the Kapitalwise CD Calculator
Enter your initial deposit, CD term length, and annual percentage yield. The calculator shows your total balance at maturity and the total interest earned.
Back to Calculators
CD Interest Calculator.
A CD calculator estimates how much interest a certificate of deposit will earn by the time it matures, based on your deposit, term length, and rate.
JEWritten by
SKReviewed by
SREdited by
Updated
August 31, 2026
Your CD Inputs
Enter your numbers
$
The amount you put into the CD when you open it. Most CDs only accept a single deposit, made at opening.
How long the CD lasts before it matures, commonly ranging from three months to five years or more.
%
The fixed rate your CD earns for its full term.
Live Result
Your CD at Maturity
Balance at Maturity
$11,249
A $10,000 deposit in a 3 years CD at 4% APY.
Total Interest Earned
$1,249
Growth on Deposit
12.49%
- Initial Deposit
- $10,000.00
- CD Term Length
- 3 years
- Annual Percentage Yield
- 4% APY
- Total Interest Earned
- $1,248.64
- Balance at Maturity
- $11,248.64
Find My Matched Advisor — Free
Powered by100% free · Fiduciary advisors · No obligation
These results are estimates, not predictions. They're calculated from the figures you entered and assume your rate of return and inflation rate hold steady every year, which real markets don't do. Change any input and the result changes. Use this to compare scenarios, not to plan around a specific number.
Initial Deposit
Initial deposit is the amount you put into the CD when you open it. Most CDs only accept a single deposit, made at opening.
CD Term Length
CD term length is how long the CD lasts before it matures, commonly ranging from three months to five years or more.
Annual Percentage Yield
Annual percentage yield, or APY, is the fixed rate your CD earns for its full term.
The CD Interest Formula
The formula for a CD's final value is: FV = P(1 + r)^t, where P is your initial deposit, r is the annual interest rate, and t is the number of years. Subtracting your initial deposit from that final value gives you the total interest earned.
Unlike a savings account, a CD's rate doesn't change once you open it, which protects you if rates fall later, but also means you won't benefit if rates rise during your term. For example, a $10,000 deposit in a three-year CD at 4% APY grows to about $11,249 at maturity, compared to roughly $10,927 at 3% APY, a $322 difference from a single percentage point.
Withdrawing funds before the CD matures typically triggers an early withdrawal penalty, which can cost some or all of the interest earned, and in some cases a portion of the principal.
Assumptions Matter
A CD calculator uses one fixed rate for the entire term, so the number you enter should match the specific CD's advertised APY exactly, not a rough estimate, since even small rate differences compound into meaningful dollars over longer terms. The calculator also assumes no additional deposits and no early withdrawal, since most CDs don't allow either without a penalty.
The Next Step
Next Steps
A fiduciary financial advisor can help you decide whether a CD, a CD ladder, or another account fits your savings timeline. Matching with an advisor is free and comes with no pressure to commit.
100% free · No obligation · No cold calls