Compound Interest Calculator
See how your money grows over time when you consistently invest and let compounding work. Experiment with contributions, time horizons, and interest rates.
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$
8
215
20
140
Every year of compounding matters. Doubling your timeframe often results in more than double the ending balance thanks to exponential growth.
Future Value
$343,778
After 20 years
Total Contributions
$130,000
You invested
Growth Earned
$213,778
Interest + market gains
Compounding Breakdown
Early on, your contributions drive growth. Over time, the green compounding portion dominates.
Scenario Vault
Save multiple versions of your inputs and compare how the outputs change.
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Comparison
Current inputs vs. selected scenario.
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