vootkit
Get Started FreeStart Free
Finance & Loans toolCalculated result

Investment Growth Calculator

Project an investment with monthly contributions and returns.

100% FreeRuns instantlyNo watermark
?
  1. 1Enter detailsAdd the numbers for your scenario.
  2. 2CalculateVootkit updates the result instantly.
  3. 3ReviewCheck totals, notes and breakdowns.
Private by designProcessed on your device where possible.
Works on any deviceDesktop, tablet and mobile browsers.
No installationOpen the page and start working.
Always free coreUse the free plan for everyday tasks.

How to use Investment Growth Calculator

Enter details

Add the numbers for your scenario.

01
Calculate

Vootkit updates the result instantly.

02
Review

Check totals, notes and breakdowns.

03
Use result

Copy the answer into your workflow.

04

Your files stay private

Your work is processed locally in your browser where possible and is never added to a Vootkit upload library.

Learn more about privacy
View all Finance & Loans tools
Compound InterestGrow savings with regular contributions over time. Enter your numbers to get a clear result. Finance & Loans Retirement ProjectionProject a pension or 401k pot at your chosen retirement age. Enter your numbers to get a clear result. Finance & Loans Savings Goal PlannerHow much to set aside each month to hit a target. Enter your numbers to get a clear result. Finance & Loans 50/30/20 Budget CalculatorSplit take-home pay into needs, wants and savings. Enter your numbers to get a clear result. Finance & Loans Take-Home PayEstimate net pay from gross salary. Calculate pay, tax or cost from simple inputs. Tax, Payroll & HR Credit Card PayoffHow long to clear a balance, and what extra payments save. Enter your numbers to get a clear result. Finance & Loans

The useful output is not the final number, which depends entirely on an assumption you cannot verify. It is the split between what you contributed and what growth added — and how that split changes with time.

What Investment Growth Calculator does

Projects the future value of an initial investment plus monthly contributions, and separates total contributed from investment growth.

It also shows the return as a percentage of what you put in, which is a more grounded way to read the result than a single large future figure.

Inputs and honest reference points

Time horizon1–80 years
Expected return0–100% a year — you supply it
CompoundingMonthly
Often-quoted long-run averageAround 7% after inflation for broad stock markets
Reality of that averageIndividual decades have been far above and far below it
Not modelledFees, tax, inflation, and sequence of returns
Rule of 72Years to double ≈ 72 ÷ return

Detailed steps

  1. Enter your initial amount and monthly contribution.
  2. Choose an expected return — and then run it again two points lower.
  3. Set the horizon.
  4. Read total contributed against growth rather than fixating on the final figure.

Worth knowing

A 1% annual fee does not cost you 1%. It compounds against you for the whole period, and over thirty years commonly consumes a fifth or more of the final balance. Modelling your return net of fees is the single change that makes a projection resemble reality.

Frequently Asked Questions

What return should I assume?

Nobody can answer that honestly for you. Broad stock market averages are often quoted around 7% after inflation over long periods, but that is an average across decades that individually ranged from excellent to negative. Model a range and plan against the pessimistic end.

Why does the order of returns matter?

For a lump sum it does not, but for regular contributions it does — a poor first decade means later contributions buy in cheaper, and a poor final decade hits the largest balance. This projects a smooth average, which no real market delivers.

Are fees and tax included?

Neither. Subtract your platform and fund fees from the expected return before entering it. Tax depends on your jurisdiction and account type, and the difference between a tax-sheltered account and a taxable one is often larger than the difference between two funds.

Is this financial advice?

No. It performs an arithmetic projection from figures you supply. What to invest in, and whether investing suits your circumstances at all, are questions for a licensed adviser who knows your situation.

Is Investment Growth Calculator free?

Yes. The Vootkit free plan includes 5 tool runs a day. Upgrade to Vootkit Pro for unlimited daily use, an ad-free workspace and saved workflows.

Are my files uploaded?

No. Investment Growth Calculator runs entirely in your browser — your file is processed on your own device and never sent to a server. There is nothing for us to store or delete.

Do I need to install anything?

No. Investment Growth Calculator works in any modern browser on desktop, tablet or phone. Open the page and start.

How often can I use it? Is there a daily limit?

On the free plan you get 5 tool runs a day. When you reach the limit you'll see a prompt to upgrade, and it resets the next day. Vootkit Pro removes the cap entirely for unlimited daily use.

This tool processes everything locally in your browser. You can disconnect from the internet after the page loads and it will still work.