CD calculator
Enter your deposit, your CD rate and the term. See how much interest it adds up to.
AmaltashUse your account's rate. For reference, 3-month Treasury bills averaged 3.4% a year from 1928 to 2025.
After 5 years at the 3.40% you entered, compounded daily, you could have
You put in $10,000. Interest added $1,853.
Hypothetical illustration based on your inputs. Not a prediction, a recommendation, or the performance of any Amaltash strategy.
How it works: your balance grows at the fixed rate you enter, compounded as often as you choose. Monthly additions go in at the end of each month. Real rates change over time.
Results change each time you change an input, and as new market data is added.
Real investing is different. Fees, taxes and trading costs are not included. Past market returns do not predict future returns, and you can lose money.
See every year
| Year | Deposits | Interest that year | Total interest | Balance |
|---|---|---|---|---|
| 1 | $0 | $346 | $346 | $10,346 |
| 2 | $0 | $358 | $704 | $10,704 |
| 3 | $0 | $370 | $1,074 | $11,074 |
| 4 | $0 | $383 | $1,457 | $11,457 |
| 5 | $0 | $396 | $1,853 | $11,853 |
The formula
Without monthly additions: A = P × (1 + r/n)n×t. P is your deposit, r the yearly rate, n how many times a year it compounds, t the years.
With monthly additions, we add each deposit at the end of the month and let it compound from then on.
APY is the rate after a year of compounding: (1 + r/n)n − 1. Banks must show it, so compare accounts by APY.
The rule of 72. 72 divided by the rate is roughly how many years it takes to double.
Questions people ask
How much interest will I earn on a CD?
Enter your deposit, the rate your bank shows, and the term. The calculator adds up the interest for you. The answer is only as good as the rate you enter.
Should I enter the rate or the APY?
Enter the rate, then pick how often it compounds. If your bank only shows the APY, enter the APY and pick Yearly. Both ways give the same answer.
How much interest does a CD earn each month?
Open "See every year" to see the interest for each year. Divide a year's interest by 12 for a rough monthly number. It is close, not exact.
Can I add money to a CD each month?
Most CDs take one deposit at the start. That is why this page has no monthly field. A savings account lets you add money any time.
What if I take my money out early?
Most banks charge a fee, often a few months of interest. This calculator does not include it. Check your CD's rules.
Does this include taxes?
No. Interest is usually taxed, which lowers what you keep. Fees are not included either.
More calculators
See this with your real accounts
Connect your accounts and we keep the numbers up to date for you.