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CD Calculator
Estimate how much a certificate of deposit (CD) will earn over its term, with different compounding options.
A certificate of deposit pays a fixed rate for a fixed term — simple, predictable, and usually a little better than a savings account. This calculator shows exactly what your deposit will grow to by maturity, so you can compare CD offers on equal terms.
How to use this calculator
- Enter the amount you plan to deposit.
- Add the APY (annual percentage yield) quoted by the bank.
- Enter the term in months or years.
- Press calculate to see the interest earned and the maturity value.
The early-withdrawal warning
The catch with a CD is the penalty for taking money out early, often several months of interest. Only lock away money you are confident you will not need before the term ends, and keep an emergency fund outside the CD.
Frequently asked questions
What is the difference between APR and APY on a CD?
APY includes the effect of compounding, so it is the true yearly return. Compare CDs by APY, not APR, for an apples-to-apples result.
How often do CDs compound?
Most compound daily or monthly. More frequent compounding gives a slightly higher maturity value at the same stated rate.
What happens when a CD matures?
You usually get a grace period of about a week to withdraw or change the term. Miss it and the bank may roll the money into a new CD at the current rate.