CD Calculator — Maturity Value, Interest & Effective Yield

How to use

1. Enter your deposit and the APY your bank quotes.
2. Pick a term and a compounding schedule.
3. Press Calculate for maturity value, interest and effective yield.
4. Compare against the 0.45% savings and simple-interest rows.

General information only — not medical, financial or legal advice. Figures cross-checked against public official sources (IRS / HMRC / NHS / WHO guidance); content last reviewed September 2026. For decisions that matter, confirm with a licensed professional in your country.

About this tool

Lock in a rate and know exactly what it pays. Enter your deposit, the APY your bank quotes and a term from six months to ten years, choose the compounding schedule — daily by default, or monthly or quarterly — and the calculator applies A = P(1+r/n)^(nt) to produce the maturity value, total interest earned and the effective annual yield the schedule implies. A comparison mini-table shows the same deposit against a 0.45% savings account and against simple, non-compounded interest, so you can see what the CD is actually earning over a plain savings route. An early-withdrawal explainer covers the typical months-of-interest penalty before you commit. Rates vary by bank and change with the market — enter the APY you have actually been offered, and the whole computation stays on your device.

FAQ

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