CD Calculator
Calculate the maturity value and interest on a certificate of deposit.
Results update as you type.
About this calculator
A certificate of deposit (CD) pays a fixed interest rate for locking money away for a set term. This calculator compounds your deposit at the stated rate and frequency to show the value at maturity, the total interest earned, and the effective annual yield (APY) so you can compare CDs with different compounding.
Frequently asked questions
How is CD interest calculated?
The deposit compounds each period: maturity = deposit × (1 + rate ÷ n)^(n × years), where n is the compounding frequency. Interest earned is the maturity value minus your original deposit.
Should I compare CDs by APR or APY?
Compare by APY, because it already folds in the compounding frequency and reflects what you actually earn in a year. Two CDs with the same APR but different compounding will have slightly different APYs.
Results are estimates for general guidance only, not financial, medical or tax advice.