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Compound growth calculator

See what steady investing could grow into over time — and how much of the final number is growth you never had to contribute.

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Starting amount$Monthly contribution$Expected annual returnThe long-run U.S. stock market average has been roughly 7–10% before inflation. Lower is more conservative.%Years invested

Your results

Projected balance

$458,044

After 30 years, 76% of your balance is growth you never contributed — that's compounding at work.

Total you contribute

$109,000

Growth (compounding)

$349,044

For educational purposes only. Estimates are based on the numbers you enter and assume steady conditions; real results vary. This is not financial advice.

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