Investment Calculator

Project growth, contributions, earnings and inflation

Initial Investment ($)

$10K

Investment Period (Years)

10 years

Annual Return (%)

Monthly Contribution ($)

$200

Annual Increase in Contribution (%)

0% per year

Compound Frequency

Inflation Rate (%)

Adjust for inflation

CONTRIBUTIONS

$34K

EARNINGS

$21K

Contributions 62%Earnings 38%

FINAL VALUE

$54,714

TOTAL INVESTED

$34,000

INTEREST EARNED

$20,714

REAL VALUE (inflation-adjusted)

$40,712

Effective Annual Return

7.23%

5-Year Projection

$28,495

10-Year Projection

$54,714

20-Year Projection

$144,573

Investment Insight: After 3.0% inflation, your effective return is about 4.11% a year in real terms. Deposits are added at the end of each month.

Investment Calculator — Free Compound Growth and Investment Projection Calculator on HighCalc

Investment Calculator: Plan Your Wealth Growth Smartly

The Investment Calculator is a powerful financial tool designed to help you estimate how your money can grow over time using compound interest, monthly contributions and long-term investment strategies. It shows a complete breakdown of your investment, including total contributions, interest earned, final value and the inflation-adjusted real value. Whether you are planning for retirement, savings goals or long-term wealth building, it gives you a clear financial roadmap.

Quick answer: investing $10,000 at 7% for 10 years and adding $200 every month grows to about $54,714. Of that, $34,000 is money you put in and about $20,714 is earnings. After 3% inflation the result is worth about $40,712 in today's money. Change any number above to see how it affects your result.

What This Investment Calculator Does

This calculator helps you estimate the future value of investments, calculate compound interest growth, add monthly contributions, include contributions that rise over time, adjust results for inflation, compare contributions with earnings visually and project 5, 10 and 20-year growth. It uses standard compound interest formulas, so with real-time results you can see how small changes in monthly savings or rate can change your future wealth.

What Is Compound Interest?

Compound interest is the process where your investment earns returns, and those returns also start earning returns. You earn interest on your investment, and then interest on that interest. This creates exponential growth, which is why long-term investing is one of the most powerful wealth-building strategies. For example, $10,000 at 7% for 20 years grows to $38,697 with yearly compounding, compared with only $24,000 with simple interest.

Future value with monthly contributionsFV = P × (1 + i)^N + PMT × ((1 + i)^N − 1) ÷ i (P = starting amount, PMT = monthly deposit, i = monthly rate, N = number of months)

This table shows $10,000 plus $200 a month at different returns and time periods:

Time	5% a year	7% a year	9% a year
10 years	$47,527	$54,714	$63,216
20 years	$109,333	$144,573	$193,669
30 years	$211,129	$325,159	$513,454

Real Value: Adjusting for Inflation

Inflation reduces what money can buy, so a large future number can be worth less than it looks. The real value divides the final amount by (1 + inflation) for each year, which shows its worth in today's money. With 3% inflation, $54,714 after 10 years has the buying power of about $40,712 today. This is why long-term plans should compare returns with inflation, not just with zero.

Increasing Your Contributions Each Year

If your income grows, your savings can grow too. Using the annual increase option, a $200 monthly contribution that rises 3% every year turns $10,000 at 7% into $171,236 after 20 years, compared with $144,573 if it stays flat. The extra deposits arrive earlier in the plan and have longer to compound.

Mortgages, Real Estate and Investing

A mortgage is a long-term loan used to buy property. You repay it in monthly installments with interest, and the property acts as collateral. Many people use a mortgage to build home equity instead of paying rent, which is a form of long-term investment. When you compare options, weigh the cost of debt against possible investment returns. The mortgage calculator shows the cost of a home loan, and the rent vs buy calculator compares buying with renting. To see how interest builds on its own, try the interest calculator or the compound interest calculator.

Limits of Investment Projections

The calculator assumes a constant return, deposits at the end of each month and no taxes or fees. Real investments rise and fall and no return is guaranteed. Results are estimates for general information and are not financial advice, so speak to a qualified adviser before making investment decisions. For retirement goals, the retirement calculator and the savings calculator are useful partners.

Who Should Use This Calculator?

Investors in stocks, ETFs or mutual funds, salaried employees planning monthly savings, retirement planners, students and beginners learning how compounding works, and business owners planning reinvestment can all use it to set realistic goals, compare strategies and build long-term habits.

How to Use This Investment Calculator

Enter your initial investment

Your starting amount, for example $1,000 or $10,000.

Set the investment period

Choose how many years you plan to invest.

Add the expected annual return

For example 7%, a common long-term stock market average.

Add your monthly contribution

How much you will invest each month.

Set an annual increase (optional)

Raise your contribution each year if your income grows.

Choose the compound frequency

Monthly, quarterly, annually or daily.

Add inflation (optional)

Turn on the adjustment to see the real purchasing power.

Click "Calculate Investment"

See the final value, total invested, earnings, real value and 5, 10 and 20-year projections.

Features

Instant Results

Everything updates as you move a slider

Monthly Contributions

With an optional yearly increase

Inflation Adjustment

See the real value in today's money

Growth Chart

Contributions versus earnings at a glance

Works Everywhere

Fully responsive on phone, tablet, and desktop

Private & Secure

All calculations run in your browser — nothing is stored

Frequently Asked Questions

Common questions about the Investment Calculator.

How does compound interest work in investing?

Compound interest means your earnings generate their own earnings. Each period, the return is added to your balance and the next return is calculated on the larger amount. Over long periods this accelerates growth, which is why starting early matters so much.

What is the difference between nominal and real returns?

Nominal returns are the actual percentage growth of your investment. Real returns adjust for inflation to show the growth in your purchasing power. At 7% growth and 3% inflation, your real return is about 3.9% a year.

How much should I save each month for investing?

A common guideline is to save 10 to 20 percent of your income for long-term goals, but the right amount depends on your goals and budget. Use the calculator to test different monthly contributions and see how they change your final value.

What is a good average annual return for investments?

Diversified stock portfolios have historically averaged roughly 7 to 10 percent a year before inflation, and conservative portfolios such as bonds have averaged less. Returns vary from year to year and are never guaranteed, so use a cautious figure when planning.

How does increasing my contributions each year help?

Raising your monthly contribution as your income grows adds more money earlier, which then compounds for longer. In the example on this page, increasing a $200 monthly contribution by 3% a year lifts the 20-year result by about $26,663.

Is this investment calculator accurate?

It uses standard compound growth formulas with regular monthly contributions, a constant annual return and optional inflation adjustment. Real markets are not constant, and taxes and fees are not included, so treat the result as an estimate and not a prediction.