Financial Calculators

CD Interest Rate Calculator

Calculate the exact compound interest earned on Certificates of Deposit. Compare compounding frequencies and term length yield differences.

Reviewed by David Miller, CPA (CPA, M.S. Finance (NYU Stern))

Verified for accuracy•Updated 2026

Interactive Calculator

1. Provide Details

Initial Principal ($)

Annual Nom. Interest Rate (%)

Term Length (years)

yrs

Compounding Interval

2. Output Results

End Balance Value5809.11 $

Total Interest Earned809.11 $

Annual Percentage Yield (APY)5.127 %

How to Calculate: Formula & Steps

Standard compounding interest math that computes future value and subtracts the principal to isolate interest growth.

Formula Used:A = P * (1 + r/n)^(n*t)

Step-by-Step Calculation Example

An investment of $5,000 for 5 years at 4.25% compounded quarterly earns $1,175.76 in interest.

Common Mistakes to Avoid

Confusing the nominal interest rate with the yield (APY). Always compare APY across banks.

Practical Use Cases

Savings growth projections
Comparing CDs vs savings accounts

Expert Tips

Daily compounding yields the highest interest. Look for institutions that compound daily rather than monthly.

Disclaimer

This calculation tool is provided for educational and informational estimation purposes only. Results are based on mathematical formulas and user-supplied parameters. They do not constitute formal underwriting, financial, tax, engineering, or legal determinations.