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financial / Free Online Tool

Investment Calculator.

Forecast the end balance of a portfolio with recurring contributions and compound growth.

Input Parameters

$
$
%
years

Comments & Feedback.

Documentation

User manual & function guide.

Detailed manual explaining every function, input parameter, and operational example for the Investment Calculator.

Starting Capital

Function

Initial portfolio balance.

Example Operation Starting Capital = $20,000

Monthly Contribution

Function

Added monthly investment.

Example Operation Monthly Contribution = $300

Expected Annual Return

Function

Projected annual growth rate.

Example Operation Annual Return = 8.0%

Investment Horizon

Function

Investment duration in years.

Example Operation Horizon = 20 years

End Balance Calculation

Function

Calculates total future portfolio value.

Example Operation $20k + $300/mo @ 8% for 20 yrs = $267,048 total

Frequently asked questions.

How do compound returns affect investment growth?

Compound returns create exponential growth because you earn returns not only on your initial investment but also on previously accumulated returns. Over long periods, this dramatically increases your portfolio value.

What is a realistic annual return rate for investments?

Historically, the S&P 500 has returned approximately 10% annually before inflation, or about 7% after inflation. However, past performance does not guarantee future results.

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