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Investment Calculator — Portfolio Growth & Returns

Estimate total return, capital gains, and ending balance for stocks, ETFs, and bonds.

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Growth & Investment Strategy

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Future Value of Investment Formula

Transparent mathematical methodology explained in plain English.

FV = PV(1 + r)^t + PMT × [ ((1 + r)^t - 1) / r ]

Calculates the projected growth of periodic contributions at a constant annual percentage rate.

Variables Explained:

  • FV: Future value of investment.
  • PV: Present portfolio value.
  • r: Expected annual rate of return.
  • t: Time horizon in years.
Real Project Example

Long-term Stock Market Index Investing

Evaluating $500 monthly investment over 25 years at 7% annual real return.

Sample Project Inputs:
Initial: $5,000
Monthly Deposit: $500
Return: 7%
Years: 25
Step-by-Step Calculation:
  1. Total cash contributed: $5,000 + ($500 × 300) = $155,000.
  2. Compound growth: $383,996.
  3. Total ending balance: $411,000.
Calculated Answer: $411,000 projected portfolio value.
Verified Calculation Standards E-E-A-T Verified

Formulas calibrated against Standard Compound Amortization Algebraic Models & Truth in Lending (TILA) Formula Standards. Calculations are computed 100% client-side in your browser for absolute data privacy.

Knowledge Base

Frequently Asked Questions: Investment Calculator

Click any question below to expand quick answers, formulas, and expert tips.

What is a realistic annual stock market return?

Historically, the S&P 500 has averaged approximately 10% annual nominal return before inflation, or about 7% annual return after accounting for inflation over multi-decade horizons.