Free DCA calculator: dollar cost averaging online

Dollar cost averaging is the simplest investing strategy that works. Invest a fixed amount on a regular schedule, regardless of price. The math behind it is straightforward, but seeing the numbers for your specific situation makes the strategy real.

What the calculator shows you

Enter your investment amount, frequency, time period, and expected return rate. The calculator shows:

• Total invested: How much cash you put in over the entire period
• Portfolio value: What your investments are worth at the end
• Total gain: The difference between portfolio value and total invested
• Average cost per share: Your effective buy price over time

Example: $500/month for 10 years

Here is what $500 per month into a broad market index (roughly 10% average annual return) looks like:

• Total invested: $60,000
• Portfolio value: ~$102,000
• Total gain: ~$42,000

That $42,000 in gains came from doing nothing special. No stock picking, no market timing. Just $500 automatically invested every month for 10 years.

Why DCA works

DCA works because of three things:

1. It removes timing from the equation. Nobody can consistently time the market. DCA means you buy at high prices AND low prices, which averages out to a reasonable entry point.
2. It forces consistency. The hardest part of investing is doing it regularly. Automating a fixed amount removes the decision fatigue and the temptation to skip a month.
3. It benefits from volatility. When prices drop, your fixed $500 buys more shares. When prices recover, all those extra shares are now worth more. Volatility is your friend with DCA.

DCA vs lump sum: the real comparison

Research from Vanguard shows that lump sum investing beats DCA about 68% of the time. But that assumes you have a large sum sitting in cash, ready to invest all at once. Most people do not have that situation.

For most people, DCA is not a choice. It is the natural way to invest. You get a paycheck, you invest a portion, you repeat. That is DCA. The alternative is not "lump sum" but "don't invest at all until you have a big pile of cash," which is worse.

Read more: DCA vs lump sum: which is actually better?

What to DCA into

DCA works best with broadly diversified investments:

• Total market index funds (VTI, VTSAX)
• S&P 500 index funds (VOO, SPY)
• Target date retirement funds
• International index funds (VXUS)
• Bitcoin or Ethereum (for those with higher risk tolerance)

DCA into individual stocks is riskier because a single company can go to zero. An index fund cannot.

How to set up automatic DCA

Most brokerages support automatic recurring investments:

• Fidelity: Automatic Investments for mutual funds and some ETFs
• Schwab: Automatic Investment Plan (AIP)
• Vanguard: Automatic investment for mutual funds
• Robinhood: Recurring investments for stocks and ETFs
• Crypto exchanges: Coinbase, Kraken, and Binance all offer recurring buys

Set it up once, forget about it. Check quarterly or annually. That is the whole strategy.

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