Investment Growth Calculator

See how a lump sum and optional yearly additions grow at a given return. Enter the initial amount, return, and time.

Ending Value
After growth.

Usage Tip

Low-cost, diversified, long-held investments historically beat frequent trading after fees. Time in the market is the main lever.

THE MATH
FV = P(1+r)^t + C × (((1+r)^t − 1) ÷ r)
P = initial, C = annual addition, r = annual return, t = years
Investment growth compounds annually here: each years gain is added to the base for the next year.
The growth multiple shows how many times your invested money you end up with.
Real markets are volatile; a steady-return estimate smooths over good and bad years.
Fees and taxes reduce real returns and are not included.
Reinvested dividends are a large part of long-run stock returns, so assume returns include them.
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.