General investing

Mutual Fund Calculator

Project the future value and gains of a mutual fund investment from a lump sum, monthly investments and an expected return.

  • Free
  • No sign-up
  • Updated for 2026

Your investment

$
$

invested each month

%
yr

Enter your lump sum, monthly amount, return and years to project the value.

Worked example

With these example inputs:

  • Lump sum$10,000
  • Monthly investment$500
  • Expected annual return10%
  • Years15 yr

Future value: $251,774

  • Starting amount$10,000
  • Total contributions$90,000
  • Total interest$151,774
  • Total growth151.8%

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What this mutual fund calculator does

This calculator projects the future value of a fund. You enter a lump sum, a monthly amount, a return, and the years. The tool then shows the future value in your chosen currency. It also shows the total gains. This is a quick investing tool. You can test different figures. The result helps you plan your investing.

How mutual fund growth works

A mutual fund grows through compounding. Your money earns a return each year. Those returns then earn returns too. Regular monthly investing adds fuel. So the balance snowballs over time. It uses the currency you pick.

How it is calculated

The tool takes your lump sum. It adds your monthly investment each month. It grows the balance at your return. So the return compounds month by month. The result is the future value. The calculator takes care of this for you.

What the result tells you

The result shows the future value. Ten thousand plus five hundred a month at ten percent over fifteen years grows to about two hundred fifty thousand. A higher return grows it faster. More years grow it more. So it shows what your fund becomes. It is a clear closing figure.

The lump sum

The lump sum is your starting amount. It is the money you invest today. A larger start leads to a larger end. So the base sets the scale of growth. Every dollar today compounds for years. So a bigger base pays off later. Enter what you can invest now.

The monthly investment

The monthly investment is what you add each month. Steady contributions build the balance fast. Each one earns a return from then on. So small amounts add up over time. Even a modest sum matters a lot. So a higher amount lifts the end value. Add what you can spare.

The expected annual return

The expected annual return is the yearly growth. It drives how fast the fund builds. A higher return lifts the future value sharply. So small changes matter a lot. Use a realistic long-term figure. So do not assume the best case. Pick a return you can expect.

How to use it

Enter your lump sum first. Add the monthly amount and the return. Read the future value in your chosen currency. See the total gains too. Then try different figures. Compare a few returns. Use it to plan your investing.

The limits of this calculator

Every tool has its limits. It assumes a steady return every year. Real fund returns rise and fall. It ignores fees, tax, and inflation. Fund fees can drag on growth. So treat it as an estimate. So use it thoughtfully.

Common mistakes to avoid

A common mistake is assuming a fixed return. Real markets are bumpy. Another is ignoring fund fees. They quietly eat your gains. Some forget inflation and tax. Others use too high a return. Knowing the figure helps you sidestep them.

A final tip

Use this to plan your investing. Remember a regular amount adds real fuel. Use a realistic return for the long run. Start as early as you can. Let compounding do the heavy lifting. Do not forget fees and inflation. A careful check guides your plan.

Frequently asked questions

How does compounding help?

Returns are reinvested and earn further returns, so the balance grows faster over time. The longer you stay invested, the larger that effect.

Are mutual fund returns guaranteed?

No. Returns vary with the market and are not guaranteed, so this projection assumes a steady annual return for illustration only.