CD Calculator
The CD Calculator projects the maturity value of a certificate of deposit from your deposit, APY and term, showing the total interest earned at your chosen compounding frequency.
What this means
A CD locks your money for a fixed term in exchange for a guaranteed APY. Because the rate is fixed, the maturity value is predictable — ideal for money you won't need soon.
How we calculate it
Formula
Maturity value = P × (1 + r/m)^(m×t) — with P deposit, r APY, m compounding periods per year, t years.Worked example
$10,000 in a 12-month CD at 4.5% compounded monthly:
- 1Maturity value = 10,000 × (1 + 0.045/12)^12
- 2Maturity value ≈ $10,459
- 3Interest earned ≈ $459
Important assumptions
- The APY is fixed and you do not withdraw early.
- Interest is compounded at the selected frequency.
- Early-withdrawal penalties are not included.
Frequently asked questions
What is APY?
APY (annual percentage yield) is the real yearly return including compounding, so it's the right number to compare CDs.
Is a CD worth it vs a savings account?
CDs usually pay more than savings accounts in exchange for locking your money. They're a good fit for money you can commit for the term.