Dollar Cost Averaging Calculator
This dollar cost averaging calculator simulates how a fixed amount invested at regular intervals grows over time. Instead of timing the market with one big purchase, dollar cost averaging (DCA) spreads your buying across many periods, so you pick up more shares when prices are low and fewer when they are high. It is built for anyone planning recurring contributions to stocks, ETFs, or Bitcoin.
Pick the Stock or Bitcoin preset, set your contribution, frequency, expected return, and time horizon, and the calculator instantly projects your final portfolio value, total return, and ROI. A built-in comparison shows how the same money would have grown as a single lump sum, so you can weigh both approaches side by side.
How to Use the DCA Calculator
Choose a preset
Select Stock or Bitcoin at the top to load realistic defaults. Stock uses a 10% annual return with monthly investing, while Bitcoin starts at a higher 30% return with weekly contributions.
Set your parameters
Adjust the Investment Amount, Investment Frequency (Weekly, Biweekly, or Monthly), Expected Annual Return, and Investment Period with sliders or by typing. Add an optional Initial Investment as a starting lump sum.
Review your results
The summary updates in real time with your Final Portfolio Value, Total Invested, Total Return, and ROI. The comparison panel shows the Lump Sum Value and the difference versus DCA.
Explore the charts
The growth chart plots portfolio value against total invested over time, and the donut chart splits your final balance into contributions and returns. Expand the Year-by-Year Breakdown for annual figures.
Features
Stock & Bitcoin Presets
Switch between Stock and Bitcoin modes, each preloaded with realistic return, frequency, and time-horizon defaults so you can start simulating instantly.
Flexible Input Controls
Set the investment amount, return rate, and period with sliders or direct typing, and the two stay perfectly in sync.
Weekly, Biweekly, Monthly
Model any contribution schedule with weekly, biweekly, or monthly investing, plus quick year presets of 3, 5, 10, 20, and 30 years.
Optional Initial Lump Sum
Add a starting balance on top of your periodic contributions to see how an upfront amount compounds over time.
DCA vs. Lump Sum
Compare your DCA result with investing the same total amount all at once, including the projected value and the difference.
Portfolio Growth Chart
An area chart tracks your portfolio value over time, with an optional overlay of total invested for an easy visual gap.
Balance Breakdown Donut
A donut chart splits your final balance into invested capital and investment returns, each with its own percentage.
Year-by-Year Breakdown
Expand a collapsible table to see cumulative invested, cumulative return, and total balance for every year of the plan.
Multi-Currency Support
Pick your currency from the built-in picker and default values scale automatically to match it.
Real-Time Calculation
Every summary card, chart, and table updates the moment you move a slider or change an input, with ROI shown as a percentage.
Frequently Asked Questions
How does dollar cost averaging work?
You invest a fixed amount on a set schedule regardless of price. That fixed sum buys more units when prices are low and fewer when they are high, which averages out your cost per share over time. This calculator models that process and compounds your expected return each period to project the final balance.
Is DCA better than lump sum investing?
It depends on the market. In a steadily rising market, lump sum usually wins because your full amount is invested longer. DCA's advantage is reduced timing risk and steady discipline, which lowers the chance of putting everything in at a market peak. Use the Lump Sum comparison panel to see the difference for your own numbers.
What annual return should I use for stocks?
The S&P 500 has historically averaged about 10% per year before inflation, which is the Stock preset default. For a more conservative plan, try 7–8% to account for inflation, or adjust the rate to match your own strategy. The return slider goes up to 30% in Stock mode and up to 100% in Bitcoin mode.
Why does the Bitcoin preset use a higher return rate?
Bitcoin has historically shown higher average returns than traditional stocks, but with far more volatility. The 30% Bitcoin default is a moderate estimate based on past performance — real future returns could be much higher or much lower. Adjust the rate to reflect your own expectations.
Does this calculator account for fees and taxes?
No. It shows gross returns before fees and taxes. In practice, trading fees, fund expense ratios, and capital gains taxes will reduce your actual results. A simple way to allow for these costs is to lower your expected annual return slightly.
How accurate are the projections?
The calculator applies a constant annual return, which simplifies real markets that rise and fall year to year. The result is a useful planning estimate rather than a guarantee, and actual outcomes will vary with market conditions. DCA's strength is that it naturally averages out some of those swings.
Can I add an initial investment on top of DCA?
Yes. Use the Initial Investment field to set a starting lump sum. That amount begins compounding from day one while your periodic DCA contributions are added on top throughout the investment period.
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