Compound Interest Calculator
See the power of compounding from principal, annual rate and term.
Result
How to use
- Enter your values in the fields above.
- Press Calculate to see your result instantly.
- Use the Share button to copy a link to your result.
About this calculator
Compound interest describes what happens when the interest an amount earns is added back to the balance, so future interest is calculated on a growing base rather than just the original sum. This calculator projects that snowball effect forward using the principal, the rate, how often interest is compounded, and the length of time, showing how the growth curve steepens the longer the money stays invested.
It is used by savers comparing deposit accounts, investors estimating how a lump sum or regular contributions might grow, and students learning why starting early matters more than the rate itself in many cases. It also helps illustrate the flip side, since the same math applies to debt that accrues interest on unpaid interest.
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