CD Calculator
Last updated: July 2026
Estimate certificate of deposit maturity value and interest earned.
Maturity value
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- Interest earned: —
- Average monthly interest: —
On this page
Quick summary: Estimate certificate of deposit maturity value and interest earned. Enter the requested values, calculate, review the result, and compare more than one realistic scenario before making a decision.
Read the complete guide
What this calculator does
The CD Calculator estimates the future value of money placed in a certificate of deposit under a stated interest rate, term, and compounding schedule.
How to use the calculator step by step
Enter the deposit amount, annual rate, term, and compounding frequency shown by the calculator. If the CD pays interest differently from the assumptions on the page, treat the result as an estimate.
How the calculation works
CD growth is generally modeled by compounding the deposit balance over the term. Interest earned in one period may be added to principal and earn additional interest in later periods.
Worked example and scenario testing
A 10,000 deposit earning 5% annually for one year would produce about 500 in simple annual interest, while more frequent compounding can raise the ending balance slightly.
How to interpret your result
The result shows projected maturity value under the entered rate and term. It does not automatically include penalties for early withdrawal or tax on interest.
Accuracy, assumptions, and limitations
Actual CDs can have early-withdrawal penalties, callable terms, variable rates, minimum balances, promotional rules, and different crediting schedules.
Common mistakes to avoid
Do not compare CDs only by nominal rate when APY or compounding frequency differs. Also verify whether the term is entered in months or years.
Privacy and browser-based calculations
Only deposit, rate, and term values are needed. Do not enter bank account or certificate numbers.