How is CD interest calculated?

Maturity value = deposit × (1 + rate ÷ n)^(n × years), where n is the number of compounding periods per year.

What is the difference between APR and APY?

APR is the stated annual rate. APY includes the effect of compounding within the year, so it is slightly higher whenever interest compounds more than once a year.

My bank quotes APY — what should I enter?

This calculator expects the APR. If you only know the APY, choose annual compounding and enter the APY as the rate.

Are early withdrawal penalties included?

No. Withdrawing before maturity usually costs several months of interest.

Yes. Everything is calculated locally in your browser.

Certificate of Deposit (CD) Calculator

Calculate the maturity value, interest earned and APY of a certificate of deposit with daily, monthly, quarterly or annual compounding.

100% free
Private in browser
No signup
No watermarks

Deposit amount ($)

Interest rate (APR %)

Term (months)

Compounding

Value at maturity

$10,460.25

Interest earned

$460.25

APY

4.602%

Rate this tool

Be the first to rate — helps others and improves this page.

About Certificate of Deposit (CD) Calculator

Find out what a certificate of deposit will be worth at maturity. Enter the deposit, interest rate, term and compounding frequency to see the maturity value, total interest and the equivalent annual percentage yield (APY).

How to use Certificate of Deposit (CD) Calculator

Enter the amount you will deposit.
Enter the CD interest rate (APR) and the term in months.
Pick the compounding frequency to see maturity value, interest and APY.

Key features

Daily, monthly, quarterly or annual compounding
Maturity value and interest earned
APR to APY conversion
Any term length in months
Private in-browser calculation

Frequently asked questions

How is CD interest calculated?: Maturity value = deposit × (1 + rate ÷ n)^(n × years), where n is the number of compounding periods per year.
What is the difference between APR and APY?: APR is the stated annual rate. APY includes the effect of compounding within the year, so it is slightly higher whenever interest compounds more than once a year.
My bank quotes APY — what should I enter?: This calculator expects the APR. If you only know the APY, choose annual compounding and enter the APY as the rate.
Are early withdrawal penalties included?: No. Withdrawing before maturity usually costs several months of interest.
Is my data private?: Yes. Everything is calculated locally in your browser.

Related In-Depth Guides

Learn practical workflows, real-world examples, and expert tips in our comprehensive guides:

Home Renovation & DIY · 8 min read