Finance Tool
CD Rate Calculator
Estimate earnings on a Certificate of Deposit. Enter your deposit, rate, and term to see your maturity balance, total interest earned, and effective APY instantly.
CD Rate Calculator
Estimate earnings on a Certificate of Deposit · Compound interest · Maturity balance
⚡ Estimated earnings assume interest compounds and remains in the CD until maturity. Actual bank CDs may vary. APY is the effective annual yield based on the nominal rate and compounding frequency.
How to use this free CD rate calculator
This CD rate calculator helps you estimate how much interest a Certificate of Deposit will earn by maturity. Enter your deposit amount, the annual interest rate offered by your bank, the term in months, and the compounding frequency. The tool instantly shows your final balance, total interest earned, and the effective APY so you can compare CD offers accurately.
Whether you are searching for best CD rates 2025, 1-year CD calculator, or compound interest on CD, this tool covers all common CD terms from 3 months to 60 months and supports daily, monthly, quarterly, semi-annual, and annual compounding.
What is a Certificate of Deposit?
A Certificate of Deposit is a savings product offered by banks and credit unions. You deposit a fixed amount for a set term and receive a guaranteed interest rate. CDs are FDIC-insured up to $250,000 per depositor, making them one of the safest ways to grow savings.
CD interest formula
The calculator uses the standard compound interest formula: A = P × (1 + r/n)n×t, where P is the principal, r is the nominal annual rate as a decimal, n is the number of compounding periods per year, and t is the term in years.
What is APY and why does it matter?
APY (Annual Percentage Yield) is the effective annual return after compounding is applied. A CD advertised at 4.5% APR compounded monthly actually earns a slightly higher APY of about 4.594%. Always compare CDs using APY, not just the stated rate, so you get an accurate picture of what you will actually earn.
Frequently asked questions
This is an estimate for planning purposes. Actual CD earnings depend on the bank's exact terms, any early withdrawal penalties, and whether interest is paid out or left to compound.
Most bank CDs compound daily or monthly. Daily compounding earns slightly more than monthly. Check your bank's disclosure documents for the exact frequency before comparing offers.
Most CDs charge an early withdrawal penalty, often 60 to 180 days of interest. This calculator assumes you hold the CD to full maturity without any withdrawals.
Yes — the compound interest formula works the same way. Just enter the APY advertised by the account as the annual rate and set compounding to daily or monthly.