Free Investment Calculator Online
Use this free investment calculator to project how your portfolio grows over time. Enter your initial investment, monthly contributions, expected return rate, and time horizon — then see your total balance and earnings breakdown instantly.
Future Value
Enter your details to calculate
How This Investment Calculator Works
This investment calculator applies compound growth to your starting balance and recurring contributions. Each year, your portfolio earns returns on both the original principal and all accumulated gains — which is why even modest contributions can grow into substantial wealth over long periods.
For example, starting with $10,000 and contributing $300/month at a 7% annual return over 25 years produces roughly $278,000. Of that total, $100,000 comes from your own contributions and $178,000 is pure investment growth. The longer your money stays invested, the more compounding works in your favor.
The investment calculator also breaks down your results year-by-year, so you can see exactly when your portfolio crosses key milestones. This helps you set realistic expectations and stay motivated through market volatility.
Average Historical Returns by Asset Class
These are long-term averages before inflation. Subtract roughly 3% for real (inflation-adjusted) returns. Use these figures as starting points in the investment calculator.
3 Key Investment Growth Factors
Time
An investor who starts at age 25 with $400/month at 7% reaches $1.06 million by 65. Starting at 35, the same contribution only reaches $487,000. Ten years of extra compounding more than doubles the result — time is your greatest asset when building investment wealth.
Consistency
Missing just 5 years of contributions in a 30-year plan can reduce your final balance by 25-35%. Setting up automatic monthly transfers removes emotion from the process and keeps your investment plan on track through bull and bear markets alike.
Low Fees
A 1% annual expense ratio on a $200,000 portfolio costs over $60,000 in lost growth over 20 years (at 7% returns). Index funds charge 0.03-0.10%, while many actively managed funds charge 1-2%. That fee gap compounds against you every year.
Frequently Asked Questions
Disclaimer: This investment calculator is for educational and illustrative purposes only. Projected returns assume a fixed annual rate applied consistently, which does not reflect real market volatility. Actual investment results will vary. Consult a licensed financial advisor before making investment decisions.
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