Compound Interest Calculator
See how your money could grow over time with contributions and compound returns. Results update as you type — there is nothing to submit.
Your numbers
$10,000
$500 per month
8.0%
20 years
Contributions are added at the same rhythm as compounding.
0.0%
Your estimated results
Estimated final balance
$343,778
After 20 years
Money you contribute
$130,000
Initial amount plus every contribution
Estimated growth
$213,778
62.2% of the final balance
Explain my results in plain English
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Contributions vs growth over time
Your contributions are money you put in. Growth represents estimated investment gains based on your assumed return.
Chart summary: after 20 years your contributions total $130,000 and estimated growth adds $213,778, for a projected balance of $343,778.
Year-by-year breakdown
Frequently asked questions
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