CD Compound Interest Calculator
Distinct from APY quoting — enter principal, stated rate, compounds per year, and years for compound future value. Click any i for detail.
Compound inputs
Principal ($)
i
Principal
Initial deposit. |
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|---|---|
Stated rate (%)
i
Rate
Nominal annual rate before APY conversion. |
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Compounds per year
i
Frequency
Typical CDs compound daily (365) or monthly (12). |
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Years
i
Years
Time on deposit. |
How to use this calculator
- Enter principal and nominal rate.
- Set compounding frequency and years.
- Read future value and interest.
Results explained
Headline is compound future value from nominal rate and frequency — compare to APY-quoted CDs on the APY calculator.
Quick reference: compound formula
Nominal vs APY.
| Item | Detail |
|---|---|
| FV | P × (1 + r/n)^(n×t) |
| APY page | Uses quoted APY directly |
Banks often advertise APY; this page is for stated rate + frequency jobs.
How the estimate is built
Future value = principal × (1 + rate/n)^(n×years) with n = compounds per year.
Example scenario
$5,000 at 4.5% compounded daily for 3 years grows to roughly $5,710 — APY would be slightly higher than 4.5% nominal.
FAQ
Daily vs monthly?
More frequent compounding yields slightly more interest.
Which calculator for bank quote?
Use certificate of deposit APY when the bank prints APY.
Withdraw early?
Penalties not modeled.