Investment Calculator
Result
Investment Calculator — free online calculator.
Formula
- Project monthly contributions and an initial investment using monthly compounding; real future purchasing power discounts the nominal future amount by cumulative annual inflation.
- The main inputs are Initial Investment, Monthly Contribution, Expected Annual Return, Investment Period, Annual Inflation Rate. Enter them in the units and format shown in the calculator.
- Use monetary amounts, rates and time periods exactly as labeled; the result reflects the assumptions entered on this page.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Investment
- Initial Investment: 100000
- Monthly Contribution: 5000
- Expected Annual Return: 12
- Investment Period: 10
- Annual Inflation Rate: 6
The calculator compounds the initial investment annually and adds the future value of equal annual contributions. The assumed return is constant and results are projections rather than guaranteed investment performance.
Sample result: Calculating…
Frequently asked questions
What does the Investment calculate?
With an initial investment of $10,000, a 7% annual return, 10 years, and no additional contributions, the projected value is about $19,671.51.
Which values should I enter?
Enter Initial Investment, Monthly Contribution, Expected Annual Return, Investment Period, Annual Inflation Rate using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: FV = P(1+r/12)^(12t) + M[((1+r/12)^(12t)-1)/(r/12)]; inflation-adjusted FV = FV/(1+i)^t..
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.