T Time period in years When calculating simple interest by days use the number of days for t and divide the interest rate by 365. Step 1 Compute the periodic interest rate by dividing the base annual percentage rate by the number of times each year interest is calculated and added to the CDs balance called compounding. How to Use the CD Calculator.
For example type in 3 You can get the annual interest rate for any CD you are interested in from the financial institution that offers it such as your bank.
Optionally calculate the taxes you will need to pay on earned interest. The length of the CD ranging from 3 months to five years. Likewise to calculate simple interest month-wise use the number of months for t and divide the interest rate by 12. A P 1rn nt A is the total that your CD will be worth at the end of the term including the amount you put in.