Calculyn

CD Calculator

See how much a certificate of deposit will earn by maturity.

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Results update as you type.

Balance at maturity

$10,425.00
Interest earned
$425.00
Initial deposit
$10,000
  • Deposit96%
  • Interest4%
Balance at maturity$10,425.00

Results are estimates for planning and are not financial advice.

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How it works

APY already includes the effect of compounding, so growth is simply the deposit times (1 + APY) raised to the number of years.

Formula

Balance = Deposit × (1 + APY)^(months ÷ 12)

Example

$10,000 at 4.25% APY for 12 months grows to $10,425.

Assumptions & limitations

  • APY stays fixed for the full term.
  • Interest remains in the CD until maturity.
  • Before taxes.

Frequently asked questions

What happens if I withdraw early?

Most CDs charge an early withdrawal penalty, often several months of interest.