CD Calculator
See exactly what your certificate of deposit will be worth at maturity.
Estimates for educational purposes only — not financial, tax, or investment advice.
How CD interest works
A certificate of deposit locks your money for a fixed term in exchange for a guaranteed APY (annual percentage yield). APY already accounts for compounding, so this calculator applies it directly across your term. CDs are FDIC-insured up to limits, which makes them a low-risk place to park money you won't need until maturity.
Is a longer CD worth it?
Longer terms usually pay a higher APY, but they tie up your money and charge an early-withdrawal penalty if you need it sooner. Compare a 12-month and 36-month term above, then weigh the extra interest against how soon you might need the cash.
Frequently asked questions
What's the difference between APY and interest rate?
APY includes the effect of compounding, so it reflects what you actually earn in a year. This calculator uses APY directly, which is the number banks advertise for CDs.
Are CDs safe?
CDs at FDIC-insured banks are protected up to $250,000 per depositor, per bank. The main risk is the early-withdrawal penalty if you break the CD before maturity.