📈
Compound Interest Calculator
Project future value from principal, rate, compounding frequency, and time.
Future Value
$20,096.61
Total Interest Earned
$10,096.61
Compound interest grows a principal amount by applying interest not just to the original sum, but to previously earned interest as well, accelerating growth over time.
Small differences in rate or time horizon compound into large differences in outcome — this is why starting early and minimizing fees tends to matter more than trying to time short-term returns.
FAQ
How does compounding frequency affect returns?
More frequent compounding (e.g. monthly vs annually) slightly increases the effective return, since interest starts earning interest sooner — though the effect shrinks as frequency increases beyond monthly or daily.
What's the formula used here?
This uses the standard compound interest formula: FV = P × (1 + r/n)^(n×t), where r is the annual rate, n is compounding frequency, and t is years.