CD Calculator - Certificate of Deposit Interest Calculator

Estimate how much a Certificate of Deposit (CD) will grow over time. Enter the deposit amount, annual interest rate, term and compounding frequency to see the final balance and interest earned.

Initial deposit:

Final balance at maturity:

Total interest earned:

Effective annual yield (approx):

This calculation assumes interest is compounded at the selected frequency and left in the CD until maturity with no withdrawals.

CD Calculator Explained

This CD calculator estimates how much a Certificate of Deposit can grow over time using compound interest. You can enter the initial deposit, annual interest rate (APR), CD term in years and the compounding frequency (annual, quarterly, monthly or daily).

The calculator uses the standard compound interest formula:

Final Balance = Deposit × (1 + r / n)^{n × t}

where r is the annual rate (as a decimal), n is the number of compounding periods per year, and t is the number of years in the CD term.

CD calculators are useful for comparing:

Different CD offers from banks and credit unions
Short-term vs long-term CDs
Fixed-rate CDs versus savings accounts
How much interest you earn before maturity

The effective annual yield (EAY) shows how compounding increases the real yearly return compared to the stated APR. This tool assumes interest remains in the account for the entire term and does not model early withdrawal penalties, which can reduce actual earnings.