Compound Interest Calculator
See how savings grow with compound interest over time.
How to use it
- Enter your starting amount and the annual rate.
- Set the number of years and how often interest compounds.
- Read the final balance and the interest earned.
About this tool
This calculator grows a starting amount by compound interest, where each period earns interest on the previous interest as well as the principal. Choose yearly, quarterly, or monthly compounding. It models a single lump sum at a fixed rate, with no further deposits, no withdrawals, and no tax or inflation, so treat the result as a clean projection rather than a guarantee.
Examples
$10,000 at 7 percent, 10 years, monthlyAbout $20,097$5,000 at 5 percent, 20 years, yearlyAbout $13,266Common uses
- Project the growth of a savings deposit
- Compare compounding frequencies
- See the effect of time on returns
- Set a savings goal
FAQ
Is anything I enter tracked?
What does compounding frequency change?
Does it account for tax or inflation?
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Open toolEmbed this tool
Paste this snippet to put the tool on your own site. It runs entirely in the visitor's browser, the same as it does here.