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Investment Calculator

Free investment calculator to project portfolio growth over time. Enter initial investment, monthly contributions, expected return rate, and investment period. Compare preset portfolios (conservative to aggressive). View inflation-adjusted returns and year-by-year growth tables.

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How to Use Investment Calculator

  1. 1Enter your initial investment amount.
  2. 2Set monthly contributions and expected annual return.
  3. 3Choose investment period in years.
  4. 4View projected growth, total returns, and year-by-year breakdown.

Frequently Asked Questions

The S&P 500 has historically returned about 10% annually before inflation (7% after). Conservative portfolios average 5-6%, balanced 7-8%, and aggressive growth 10-12%. Use lower estimates for more conservative planning.

Monthly contributions have a dramatic compounding effect. $500/month at 7% for 30 years grows to over $566,000 — with only $180,000 contributed. The remaining $386,000 is pure investment returns.

Yes, inflation erodes purchasing power. At 3% inflation, $1 million in 30 years has the purchasing power of about $412,000 today. Always consider inflation-adjusted (real) returns for retirement planning.

The Investment Calculator is a free online tool that lets you calculate investment growth with monthly contributions and dividends. It is part of NexTool's collection of free tools designed to help you work faster and more efficiently.

Using the Investment Calculator is simple: visit the tool page, enter your data or input into the provided fields, and get instant results. No downloads, installations, or sign-ups are required. The tool runs directly in your web browser for maximum convenience.

Yes, the Investment Calculator is 100% free to use with no limitations. There is no registration required, no daily usage caps, and no hidden fees. You can use it as many times as you need.

The Investment Calculator uses industry-standard formulas and algorithms to deliver reliable results. While the tool is designed for accuracy, results should be used as estimates and guidance. For critical decisions, always consult a qualified professional.

Yes, after running your calculation you can copy the results to your clipboard or take a screenshot. The Investment Calculator displays a detailed breakdown so you can easily record or share your numbers. No account is required to use or save results.

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About Investment Calculator

Free investment calculator to project portfolio growth over time. Enter initial investment, monthly contributions, expected return rate, and investment period. Compare preset portfolios (conservative to aggressive). View inflation-adjusted returns and year-by-year growth tables.

NexTool's Investment Calculator is completely free to use with no sign-up required. Your data is processed directly in your browser and never sent to our servers, ensuring complete privacy and instant results.

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Adjust for inflation
Final Portfolio Value
$385,612
after 20 years of investing
Total Contributions
$130,000
Total Investment Returns
$201,226
Total Dividends
$54,386
Returns as % of Total
66.3%
Portfolio Composition
Contributions: 33.7%
Returns: 52.2%
Dividends: 14.1%
Impact of Monthly Contributions
With $500/mo Contributions
$385,612
Without Monthly Contributions
$40,387
Monthly contributions of $500 add $345,224 to your portfolio over 20 years — that is 855% more than investing the lump sum alone.
Portfolio Growth Over Time
Year 1
Balance: $17,155
Contributed: $16,000
Without contributions: $10,723
Year 2
Balance: $24,971
Contributed: $22,000
Without contributions: $11,498
Year 3
Balance: $33,508
Contributed: $28,000
Without contributions: $12,329
Year 4
Balance: $42,833
Contributed: $34,000
Without contributions: $13,221
Year 5
Balance: $53,018
Contributed: $40,000
Without contributions: $14,176
Year 6
Balance: $64,144
Contributed: $46,000
Without contributions: $15,201
Year 7
Balance: $76,296
Contributed: $52,000
Without contributions: $16,300
Year 8
Balance: $89,570
Contributed: $58,000
Without contributions: $17,478
Year 9
Balance: $104,069
Contributed: $64,000
Without contributions: $18,742
Year 10
Balance: $119,906
Contributed: $70,000
Without contributions: $20,097
Year 11
Balance: $137,204
Contributed: $76,000
Without contributions: $21,549
Year 12
Balance: $156,100
Contributed: $82,000
Without contributions: $23,107
Year 13
Balance: $176,738
Contributed: $88,000
Without contributions: $24,778
Year 14
Balance: $199,282
Contributed: $94,000
Without contributions: $26,569
Year 15
Balance: $223,906
Contributed: $100,000
Without contributions: $28,489
Year 16
Balance: $250,803
Contributed: $106,000
Without contributions: $30,549
Year 17
Balance: $280,182
Contributed: $112,000
Without contributions: $32,757
Year 18
Balance: $312,273
Contributed: $118,000
Without contributions: $35,125
Year 19
Balance: $347,325
Contributed: $124,000
Without contributions: $37,665
Year 20
Balance: $385,612
Contributed: $130,000
Without contributions: $40,387
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Contributions
Returns + Dividends
Without contributions (hover)
$0$193K$386K
Year-by-Year Growth (20 years)
YearContributionsYear ReturnsDividendsBalance
1$16,000$955$200$17,155
2$22,000$1,473$343$24,971
3$28,000$2,038$499$33,508
4$34,000$2,655$670$42,833
5$40,000$3,329$857$53,018
6$46,000$4,065$1,060$64,144
7$52,000$4,869$1,283$76,296
8$58,000$5,748$1,526$89,570
9$64,000$6,707$1,791$104,069
10$70,000$7,756$2,081$119,906
... 7 more years ...
18$118,000$20,487$5,604$312,273
19$124,000$22,807$6,245$347,325
20$130,000$25,341$6,946$385,612
Portfolio Strategy Comparison
Conservative (5%)
$304,336
Balanced (7%)
$399,201
Selected
Growth (10%)
$612,821
Aggressive (12%)
$826,051
Disclaimer: This calculator provides estimates for educational purposes only. Past performance does not guarantee future results. Actual investment returns will vary due to market conditions, fees, taxes, and other factors. This is not financial advice. Consult a qualified financial advisor for personalized investment guidance.