CD Calculator is a free, browser-based certificate of deposit interest calculator that instantly computes maturity value, total interest earned, and effective annual yield from your initial deposit, APY, term length, and compounding frequency.
What is CD Calculator?
CD Calculator is a standalone web tool that runs entirely in your browser with no signup or data storage. You input your initial deposit (principal), APY or APR rate, term in months (including partial months), compounding frequency (daily, monthly, quarterly, semiannual, annual), and interest payout method (reinvest/compound or withdraw/simple). It outputs the maturity value, total interest, effective annual yield, and an optional full amortization schedule. The calculator also supports after-tax estimates and includes a separate early withdrawal penalty calculator and a CD ladder calculator.
Key Features
- Multiple compounding frequencies — Supports daily, monthly, quarterly, semiannual, and annual compounding to match bank statements exactly.
- APY or APR input — Choose APY (includes compounding) or APR, with automatic conversion.
- Instant results — Maturity value, total interest, and effective annual yield update as you type.
- Detailed schedule — View a period-by-period accrual schedule to see interest earned over time.
- After-tax estimate — Enter your tax rate to see a simple post-tax snapshot.
- No signup or data collection — All calculations happen client-side; no personal information is stored or transmitted.
- Mobile-friendly design — Clean interface optimized for small screens and touch.
- Bank-compatible — Works with terms and frequencies used by Chase, Wells Fargo, Navy Federal, Bank of America, Citibank, and others.
Who is it for?
- Savers comparing CD offers — Quickly test different APY rates and terms from multiple banks side by side.
