Investment Calculator
Results are estimates based on the values you enter. Recheck your inputs and assumptions before using the output for decisions.
Project investment growth from an initial investment, annual return, time period, compounding frequency, and recurring contribution.
Investment Calculator
Free online investment calculator to estimate future investment value from an initial investment, annual return, time period, compounding frequency, and recurring contribution. This calculator is useful for savers, investors, financial planners, students, business owners, and anyone who wants to see how money may grow over time with regular investing. Investment growth is easier to understand when you can see not only the ending value, but also how much of that total came from your own contributions and how much came from investment gain. That is exactly what this calculator is designed to show.
This calculator uses five key inputs. Initial investment means the amount invested at the start. Annual return means the expected yearly rate of return. Years means how long the money stays invested. Compounds per year means how often growth is applied during the year. Contribution each period means the amount added every compounding period. If monthly compounding is selected, the contribution is treated as a monthly contribution. Once these values are entered, the calculator shows future investment value, total contributions, investment gain, and growth multiple. These outputs make it much easier to understand both the total result and the quality of growth over time.
The formula of investment growth
Future value of initial investment = Initial investment x (1 + r)^n
Future value of recurring contributions = Contribution each period x [((1 + r)^n – 1) / r]
Future investment value = Future value of initial investment + Future value of recurring contributions
Total contributions = Initial investment + (Contribution each period x Number of periods)
Investment gain = Future investment value – Total contributions
Growth multiple = Future investment value / Total contributions
Here r means the return per compounding period and n means the total number of compounding periods. Initial investment means the starting lump sum, contribution each period means the regular amount added every period, total contributions means the total money you personally invested, investment gain means the extra amount created by growth, and growth multiple shows how large the ending value became relative to total contributions.
Solved Example
Example 1: Find the future value if the initial investment is $10,000, annual return is 8%, years are 10, compounding is monthly, and contribution each period is $200.
Solve: This calculator applies monthly compounding to both the initial amount and the monthly contributions over 120 periods.
Future investment value = about $58,785.61
Total contributions = 10000 + (200 x 120) = $34,000
Investment gain = 58785.61 – 34000 = $24,785.61
Growth multiple = 58785.61 / 34000 = 1.7290
Example 2: Find the future value if the initial investment is $5,000, annual return is 6%, years are 15, compounding is monthly, and contribution each period is $150.
Solve: Future investment value = about $55,893.27
Total contributions = 5000 + (150 x 180) = $32,000
Investment gain = 55893.27 – 32000 = $23,893.27
Growth multiple = 55893.27 / 32000 = 1.7467
Example 3: Find the future value if the initial investment is $20,000, annual return is 7%, years are 20, compounding is annually, and contribution each period is $1,000.
Solve: Future investment value = about $118,389.18
Total contributions = 20000 + (1000 x 20) = $40,000
Investment gain = 118389.18 – 40000 = $78,389.18
Growth multiple = 118389.18 / 40000 = 2.9597
Table of investment calculator
| Initial Investment | Annual Return | Years | Contribution Each Period | Future Value |
|---|---|---|---|---|
| $10,000 | 8% | 10 | $200 monthly | $58,785.61 |
| $5,000 | 6% | 15 | $150 monthly | $55,893.27 |
| $20,000 | 7% | 20 | $1,000 yearly | $118,389.18 |
| $15,000 | 9% | 12 | $250 monthly | $108,420.44 |
How to use this investment calculator
Enter the initial investment in the proper input field. After that, enter the annual return, the number of years, the compounding frequency, and the contribution each period. Then click the calculate button. The calculator will show future investment value, total contributions, investment gain, and growth multiple in the result box.
This calculator is useful for long-term planning because it shows how recurring contributions can work together with compounding. Many people focus only on the rate of return, but the timing and consistency of contributions can matter just as much. By showing total contributions beside investment gain, the page makes it easier to separate what you put in from what the portfolio earned for you over time.
When using the result, remember that future return is only an estimate and actual investments can rise or fall. Taxes, fees, market volatility, and irregular contribution timing can also change real-world outcomes. Even so, this calculator provides a clear and practical estimate for savings goals, retirement planning, education planning, and general investment comparison. It is a strong starting point for understanding how time, rate, and regular investing work together.