Investment Calculator
ROI & growth projections
About the Investment Calculator
Investing is a long game, and seeing the trajectory makes it easier to stick with. The Investment Calculator combines a starting amount with regular monthly contributions and an expected annual return, then projects the final value — backed by a year-by-year table showing how the balance, contributions, and profit grow.
It suits anyone building wealth steadily: someone modeling a retirement account, a parent saving toward college, or an investor sanity-checking whether a contribution rate meets a goal. Beyond the headline number, it reports total invested, total profit, simple ROI, and an annualized return, so you understand not just where you end up but how efficiently you got there.
How to Use the Investment Calculator
- Enter your initial investment.
- Enter your monthly contribution.
- Enter the expected annual return as a percentage and the investment period in years.
- Read the final value, total invested, total profit, ROI, and annualized return.
- Expand the yearly projection to see the balance build year by year.
Why Use ToolForge’s Investment Calculator
- It pairs a lump sum with recurring monthly contributions and shows a full year-by-year projection, so compounding growth is visible rather than abstract.
- It reports both simple ROI and annualized return (CAGR), separating the headline gain from the time-adjusted rate.
- Total invested is shown next to total profit, making clear how much of the final value you contributed versus what the market added.
- Everything is computed locally and instantly, with no account or data sharing.
Frequently Asked Questions
How is this different from a compound interest calculator?
A compound interest tool typically grows a single balance. This calculator adds regular monthly contributions on top of that growth and produces a year-by-year projection plus ROI and annualized-return metrics, modeling an ongoing investing habit rather than a one-time deposit.
What return rate should I assume?
Returns are never guaranteed, but many long-term investors model broad stock-market averages in the range of roughly 6–8% annually before inflation. Use a rate you can justify for your strategy, and test a conservative figure alongside an optimistic one.
Does this account for inflation or taxes?
No. The projection shows nominal growth before inflation and taxes. To gauge real purchasing power, mentally discount the result by your inflation assumption, and remember that taxes on gains depend on the account type and jurisdiction.
How much should I contribute each month?
There is no universal figure — it depends on your goal, timeline, and income. The power of this calculator is showing how even modest, consistent contributions compound over years. Try a contribution you can sustain, then raise it to see how much sooner you reach your target.
