Investment Calculator

Estimate the growth of your investments over time. Enter your starting amount, monthly contributions, expected annual return and investment period to project the future value — free, instant and private, with no sign-up needed.

How to Use

  1. Enter the lump sum you are starting with (use 0 if you are starting from scratch).
  2. Add the amount you plan to invest each month.
  3. Enter the expected annual return and the number of years you will stay invested.
  4. Click Calculate Growth to see the projected value, your total contributions and the estimated growth.

Key Features

  • Instant projection — your estimated future investment value, calculated on the spot.
  • Compound growth — returns are reinvested every year so your money grows on itself.
  • Contribution vs growth split — see exactly how much is your money and how much is returns.
  • Flexible inputs — works with lump sums, monthly contributions, or both together.
  • 100% private — everything is calculated in your browser; nothing is sent anywhere.

FAQs

Is this investment calculator free?

Yes. It is completely free with no sign-up and no limits on how many projections you run.

How is the projected value calculated?

It compounds annually: each year your balance grows by the expected annual return, and your monthly contributions are added in. The formula assumes a constant rate and twelve monthly contributions per year.

Does it account for tax or inflation?

No. The projection is before any tax and is not adjusted for inflation, so treat it as a straightforward estimate rather than financial advice.

Is my financial data stored anywhere?

No. The calculation runs entirely in your browser with JavaScript and nothing is transmitted or saved.

Related Tools

Savings Calculator · Compound Interest Calculator · Simple Interest Calculator

Scroll to Top