CD & APY Calculator
See what a certificate of deposit will be worth at maturity and its true annual yield (APY) from the nominal rate, compounding frequency, and term.
Value at maturity
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Show the math
The deposit compounds at the nominal rate; APY reflects compounding:
APY = (1 + r / m)m − 1
r = nominal rate · m = compounds per year. Maturity value is the deposit grown over the term at that frequency, and interest earned is the maturity value minus your deposit. More frequent compounding gives a slightly higher APY for the same nominal rate.
What this does
A CD calculator shows what a certificate of deposit will be worth at maturity and its true annual yield (APY) from the nominal rate, compounding frequency, and term.
How to use it
- Enter your deposit amount.
- Enter the nominal rate and the term.
- Choose the compounding frequency.
- Read the maturity value, interest earned, and APY.
How it works
The deposit compounds at the nominal rate over the term at the chosen frequency. The APY converts that nominal rate into the yield you actually earn, where m is the number of compounding periods per year.
APY = (1 + rate ÷ m)^m − 1
Understanding your result
More frequent compounding gives a slightly higher APY and maturity value for the same nominal rate. CDs trade access for a fixed return, so compare the APY against other insured savings.
Example
$10,000 at a 4.5% nominal rate compounded daily for one year reaches about $10,460, an APY of roughly 4.60%.
Sources & methodology
- Consumer Financial Protection Bureau, What is a CD?, How certificates of deposit work
- FDIC, Deposit Insurance, Coverage for insured deposits
Last updated .
Frequently asked questions
What is the difference between rate and APY?
The nominal (stated) rate does not account for compounding; the APY does. APY = (1 + rate ÷ m)^m − 1, where m is the number of compounding periods per year, and it reflects what you actually earn.
How is the maturity value calculated?
Your deposit compounds at the nominal rate over the term at the chosen frequency. The result shows the final balance and the interest earned.
Does compounding frequency change my return?
Yes, more frequent compounding (daily vs. annually) gives a slightly higher APY and maturity value for the same nominal rate.
Is anything saved?
No. The calculation happens entirely in your browser.
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