**Introduction**

Calculating the interest on a 3-year Certificate of Deposit (CD) can be a crucial financial task, especially for individuals planning for the future. In this article, we will provide you with a simple and effective 3 Year CD Rate Calculator using HTML and JavaScript.

**How to Use**

To use the 3 Year CD Rate Calculator, enter the principal amount, interest rate, and any additional contributions into the corresponding input fields. After filling in the required information, click the “Calculate” button to obtain the calculated result.

**Formula**

The formula for calculating the future value of a CD is as follows:

$FV=P×(1+r/n_{nt}$

Where:

- $FV$ is the future value of the investment.
- $P$ is the principal amount (initial investment).
- $r$ is the annual interest rate (decimal).
- $n$ is the number of times that interest is compounded per year.
- $t$ is the number of years the money is invested or borrowed for.

**Example**

Suppose you invest $10,000 in a 3-year CD with an annual interest rate of 5%, compounded quarterly. Using the formula, the future value ($FV$) can be calculated as follows:

$FV=10000×(1+40.05 )_{(×)}$

**FAQs**

**Q: Can I leave the additional contribution field blank?**

A: Yes, you can leave the additional contribution field blank if you are not making any additional contributions.

**Q: What happens if I enter a negative value for the principal amount or interest rate?**

A: The calculator requires positive values for both the principal amount and interest rate.

**Conclusion**

Utilizing the 3 Year CD Rate Calculator provides a quick and accurate way to estimate the future value of your investment. By entering the necessary details, you can make informed financial decisions for a secure future.