About the CD Calculator
Find the maturity value, interest and APY of a certificate of deposit (CD) with any compounding. This tool is free, works in your browser and needs no sign-up.
How to use the CD Calculator
Enter the deposit, interest rate, term in months and how often interest is added. Add a tax rate to see the after-tax result.
Formula used
Balance = P × (1 + r ÷ n)^(n × t). APY = (1 + r ÷ n)^n − 1.
Example
With Deposit amount 10000, Interest rate (% per year) 4.5, Term (months) 12, Tax rate on interest (%) 0, the calculator shows: Balance at maturity = 10,460.25; Interest earned = 460.25; APY = 4.602%.
Frequently asked questions
What is the difference between APY and interest rate?
The interest rate is the stated rate. APY includes the effect of compounding, so it shows the real yearly return.
Is the CD Calculator free to use?
Yes. It is completely free and you can use it as many times as you like.
How accurate is the CD Calculator?
The calculator uses standard formulas, so the maths is exact. Real life results can differ because of fees, taxes, rounding or personal factors, so treat the answer as an estimate.
Do you store the numbers I enter?
No. All calculations run in your browser. The values you type are not sent to our server.
Disclaimer: results are estimates for information only. They are not financial, medical or professional advice.