Investment Calculator

Calculate ending balance, required contribution, return rate, starting amount, or investment length. (Same functionality style as calculator.net, with your theme.)

Modify the values and see results instantly.

Inputs

Tip: Use tabs to solve for a missing value (like required contribution or return rate).

Results

End Balance: $198,290.40
End Balance
$198,290.40
future value
Starting Amount
$20,000.00
principal
Total Contributions
$120,000.00
added
Total Interest
$58,290.40
earned
Starting Amount
Total Contributions
Interest
Breakdown: 10% / 61% / 29%

Accumulation Schedule

YearDepositInterestEnding balance
1$12,000.00$1,526.53$33,526.53
2$12,000.00$2,338.12$47,864.65
3$12,000.00$3,198.41$63,063.06
4$12,000.00$4,110.31$79,173.37
5$12,000.00$5,076.93$96,250.30
6$12,000.00$6,101.55$114,351.84
7$12,000.00$7,187.64$133,539.48
8$12,000.00$8,338.90$153,878.38
9$12,000.00$9,559.23$175,437.61
10$12,000.00$10,852.79$198,290.40
Ending balance by year
1
$33,526.53
2
$47,864.65
3
$63,063.06
4
$79,173.37
5
$96,250.30
6
$114,351.84
7
$133,539.48
8
$153,878.38
9
$175,437.61
10
$198,290.40
(Simple chart. If you want real charts like calculator.net, we can add Chart.js or Recharts.)

Notes: This calculator assumes a constant nominal return rate and compounds based on your selected frequency. Contributions happen at the beginning or end of the selected period.

Project the future value of your investments with our free investment calculator. See how your money can grow over time based on your initial investment, regular contributions, expected return rate, and time horizon.

How the Investment Calculator Works

FV = P(1 + r)^t + C × [ ((1 + r)^t − 1) / r ]

Where FV = future value, P = initial principal, r = annual rate of return, t = number of years, C = regular contribution amount. The power of compounding means your returns generate their own returns over time.

How to Use This Calculator

  1. Enter your initial investment amount
  2. Enter your planned regular contribution (monthly or annual)
  3. Enter your expected annual return rate
  4. Enter your investment time horizon (in years)
  5. Click Calculate to see your projected future value and total growth

Frequently Asked Questions

What return rate should I use?

Historically, diversified stock market index funds have averaged 7-10% annually over long periods (before inflation), though returns vary significantly and are never guaranteed.

Does this calculator account for inflation?

This calculator shows nominal future value. To estimate real (inflation-adjusted) value, subtract your expected inflation rate from your return rate before calculating.

Does this account for taxes on investment gains?

No, this calculator shows gross growth before taxes. Actual after-tax returns depend on your account type and applicable tax rates.

How much difference does starting early make?

Due to compounding, starting even a few years earlier can significantly increase your final value, since your contributions have more time to generate returns on returns.