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Best CD Rate Calculator 2020 (NEW)

Find out how much your CD will be worth when you cash it in at maturity.
David Waring
Author: David Waring
Last Updated: March 8, 2020

Use the CD Calculator to find out how much your CD will be worth when you cash it in at maturity.  You can also use it to calculate the value of a savings account at a future date.

Use our CD Rate Calculator Now
Entry DescriptionAmount
CD amount:
Annual interest rate (APR %): VIEW TODAY'S RATES
Months until maturity:
Compounding interval:
State & Federal Tax Rate (if taxed):
Inflation Rate:
Future value (untaxed, not inflation adjusted):
Interest earned:
Annual percentage yield (APY):
Income taxes on interest:
Interest earnings after income taxes:
Savings after income taxes:
Inflation-adjusted future value of savings:
Net change in purchasing power:

How do you use the CD Calculator?

You’ll need to put in the following information:

Present Value: Enter your initial investment in your CD, or the amount in your savings account today (don’t put any commas in the figure).

Interest Rate (% Per Period): There are two possibilities here, depending on the information you have. If you know what the yield is for your account (the Annual Percentage Yield or APY), then enter this figure into the CD calculator. Otherwise, if you know what the yearly interest rate is, then divide the interest rate by 365 (the number of days in a year), and enter the result here.

Number Of Periods: According to what you used for the Interest Rate described above, you also have two possibilities here. If you used the yield (an annual figure) as the input for the Interest Rate, then put the number of years into the CD calculator. On the other hand, if you used a daily interest rate for the Interest Rate, then put in the number of days here (for example, 3650 days if you wanted to specify the equivalent of ten years).

Future Value: When you’ve entered in the data above and clicked on “Calculate”, this is the result. The CD Calculator tells you how much money you’ll have from your CD or in your savings account at the date in the future that you defined via the number of periods.

How is the value of a CD calculated?

Our calculator allows you to quickly and easily determine your potential return on an investment in a CD. When shopping for CDs, you will find it useful to understand how the future value of your CD is calculated.  CDs earn compound interest, which means the value of your investment increases on a periodic basis. Compound interest on CDs is typically calculated daily. The basic inputs are:

P – principal amount (initial deposit)

r – interest rate (APY)

n – number of compounding periods

t – number of years until the maturity date

Our calculator also includes the tax and inflation rate, as these two variables will affect the value of your CD at maturity. Following is the basic CD calculation formula (minus taxes and inflation):

CD Value = P × (1 + r/n)t×n

If you invested $10,000 in a CD with an interest rate of 2.25 percent and a maturity date of 5 years (APY 2.275%) , your total amount on the maturity date would be:

CD Value = 10,000 (1+0.0275)/365)^(365(5))

$10,000 (Principal Amount) + $1,190.68  (Total Interest Earned) = $11,190.68

What are the limitations of the CD Calculator?

The CD Calculator uses only a fixed rate in its calculation. With savings accounts and money market accounts, both fixed and variable interest rates are commonly used. A variable rate on your savings account will fluctuate with the benchmark interest rate set by the central bank every few months. There may also be differences in the way the compound interest is calculated; some CD interest calculations use a figure of 360 periods per year instead of 365. In general, however, CDs using daily (or nearly daily) compounding of interest are preferable to those that only compound a few times a year.


All trading carries risk. Views expressed are those of the writers only. Past performance is no guarantee of future results. The opinions expressed in this Site do not constitute investment advice and independent financial advice should be sought where appropriate. This website is free for you to use but we may receive commission from the companies we feature on this site.
David Waring

David Waring was the founder of LearnBonds.com and has been a major contributor to the extensive library of investing news and information available on the site. Until the launch of Learnbonds.com in late 2011 there was no single site on the internet catering exclusively to the individual bond investor. This was true even though more individuals own stocks than bonds. Learn Bonds was launched to fill that gap.

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