Investment Calculator

Project the growth of an investment over time with compound returns. See how initial investment and contributions compound.

Initial investment ($)

Monthly addition ($)

Expected return (%/yr)

Years

Enter investment details.

How It Works

This calculator projects growth using compound interest with regular monthly contributions. Returns are compounded monthly. Real market returns vary year to year.

FV = P(1+r)ⁿ + C × [(1+r)ⁿ − 1] / r

Example: $10,000 + $500/mo at 8% for 20 years
≈ $344,549 (invested $130,000, earned ~$214,549)

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Last updated: 2026-08-08