Educational DCA backtest and compound growth tools
DCA Backtest + Compound Growth Calculator
Run a DCA backtest on VOO, CSPX, or QQQ, project growth with the compound interest calculator, or compare ETFs side by side.
Educational only. Not financial advice.
Popular examples
Historical DCA Backtest
Test a Monthly Investment Against Historical Market Data
Compare how a steady monthly contribution could have performed using historical market prices for popular ETFs and stocks.
Backtest Inputs
DCA Scenario
Using historical data
Source: Yahoo Finance historical prices
Data source details
Historical prices are sourced from Yahoo Finance and converted into monthly closing prices for backtesting. Data may be delayed, adjusted, or different from official fund NAV.
Asset
Asset: VOO - Vanguard S&P 500 ETF
Country / Market: United States
Exchange: NYSE Arca
Currency: USD
Investment plan
Backtests use monthly prices generated from historical daily adjusted close data where available.
Results
Enter your investment details and run the backtest to see the result.
Results and sharing tools will appear after calculation.
Past performance does not guarantee future results. This calculator is for educational purposes only and is not financial advice.
Compare assets
Compare two assets
Compare two assets using the same monthly investment amount and the same time period.
VOO
Using historical data
QQQ
Using historical data
VOO Final value
$72,942
QQQ Final value
$86,421
VOO Total profit
$24,942
QQQ Total profit
$38,421
VOO Total return
52.0%
QQQ Total return
80.0%
Difference in final value
$13,479
Higher historical final value
QQQ
Comparison chart
Asset Value Over Time
This comparison uses the same monthly investment amount and time period for both assets.
Continue exploring
Investment Education
Learn how DCA backtesting and compound growth work
Use this DCA calculator, compound interest calculator, ETF comparison calculator, and monthly investment calculator to explore VOO, CSPX, QQQ, VWRA, IWDA, ETFs, stocks, and DCA vs lump sum scenarios. Historical prices are for educational backtesting only and are not financial advice.
ETF DCA Learning Hub
Learn ETF DCA basics, DCA backtesting, compound interest, VOO, CSPX, QQQ, and DCA vs lump sum.
What is dollar-cost averaging?+
Dollar-cost averaging means investing a fixed amount on a regular schedule. A DCA backtest calculator helps you compare how that habit may have performed across different market years.
What is compound interest?+
Compound interest is the effect of earning returns on both your invested capital and previous gains. A compound interest calculator can show how small monthly contributions may grow over long periods.
DCA vs lump sum investing+
DCA spreads purchases over time, while lump sum investing commits capital at once. This tool focuses on monthly investing so you can compare steady contribution behavior against historical market prices.
How to use this DCA backtest calculator+
Choose a market, asset type, ETF or stock, monthly investment amount, start year, and end year. The calculator estimates total invested, shares accumulated, ending value, profit, return, and optional advanced metrics.
ETF monthly investing example+
For example, a VOO DCA calculator, CSPX DCA calculator, or QQQ DCA calculator can model how regular ETF investing may have grown using historical monthly prices where data is available.
Supported assets and markets+
The calculator supports selected ETFs and stocks across the United States, Ireland UCITS, Taiwan, Malaysia, Singapore, Japan, and Hong Kong, including VOO, CSPX, QQQ, VWRA, and IWDA where available. Assets without imported market data clearly use sample data.
Important disclaimer
This tool is for education only and is not financial advice. Past performance does not guarantee future results, and real returns can differ because of fees, taxes, dividends, execution prices, and currency conversion.
Related guides
Continue with these related calculators and guides.
FAQ
DCA and Compound Interest FAQ
What is a DCA backtest?+
A DCA backtest simulates investing a fixed amount every month into an ETF or stock over a historical period, then estimates shares accumulated, ending value, profit, and total return.
What is compound interest?+
Compound interest is growth on both your original investment and prior gains. Over long periods, reinvested returns can become a major part of portfolio growth.
How does monthly investing grow over time?+
Monthly investing can grow through consistent contributions and market returns. The DCA backtest uses historical monthly prices where available, while the compound calculator projects future growth from your assumptions.
Can I backtest VOO or CSPX?+
Yes. You can select supported markets and assets such as VOO and CSPX. When historical CSV data is available, the backtest uses it; otherwise the calculator clearly falls back to sample data.
Is this calculator free?+
Yes. The DCA backtest calculator and compound interest calculator are currently free to use.
Is this calculator investment advice?+
No. Past performance does not guarantee future results. DCA Backtest is for educational purposes only and is not financial advice.
Can I use this for ETFs?+
Yes. The tool is designed for ETF monthly investing examples such as VOO, SPY, QQQ, CSPX, and other supported ETFs where data is available.
Why do some assets use sample data?+
Some global instruments do not have imported historical CSV files yet. When that happens, the calculator clearly marks the result as sample data instead of presenting it as real historical data.
How often is market data updated?+
Market data is updated manually for now when new CSV files are imported. The site does not use a real-time market data API yet.