DCA Calculator — Dollar Cost Averaging for Crypto

Enter your investment amount per period (for example, $100 per month) and the number of periods over which you plan to invest. Then set the starting price — the asset price at your first purchase — and the ending price, which represents the current market price or your target exit price. Finally, enter the exchange fee percentage charged on each trade.

The calculator simulates purchasing at regular intervals as the price moves linearly from your starting price to your ending price. It computes your average cost basis (the average price you paid per coin across all purchases), your total portfolio value at the ending price, and your overall profit or loss in both dollar and percentage terms.

The DCA vs Lump Sum comparison shows whether investing all your capital upfront at the starting price would have been more or less profitable than spreading purchases over time. This is one of the most important metrics for evaluating the DCA strategy objectively.

The DCA model uses linear price interpolation across all periods:

• Price at period i = startPrice + (endPrice − startPrice) × (i / (N − 1)), where N = total periods
• Net investment per period = investmentAmount × (1 − fee% / 100)
• Coins bought per period = netInvestment / price
• Average Cost Basis = totalInvested / totalCoinsAccumulated
• Final Portfolio Value = totalCoins × endPrice
• Profit/Loss % = (finalValue − totalInvested) / totalInvested × 100
• Lump Sum Result = (totalCapital × (1 − fee% / 100) / startPrice) × endPrice

DCA is most advantageous when asset prices are volatile or when the price is expected to dip before recovering. When prices move in a straight line upward, the lump sum always wins because it captures the lowest entry price. The real value of DCA is psychological: it removes the need to time the market.

Example 1 — Monthly Bitcoin DCA (Bear to Bull Market)

• Investment: $100/month for 12 months
• Starting price: $20,000 | Ending price: $45,000
• Exchange fee: 0.1%
• Total invested: $1,200
• Average cost basis: ~$30,542
• Final portfolio value: ~$1,768
• Return: +47.3%

By buying more coins when Bitcoin was cheaper (early in the period) and fewer when the price was higher (later in the period), the DCA strategy produces an average cost basis below the midpoint of $32,500. This illustrates how DCA naturally skews your average entry toward the lower end of the price range.

Example 2 — DCA During a Price Decline

• Investment: $200/month for 6 months
• Starting price: $40,000 | Ending price: $25,000
• Exchange fee: 0%
• Total invested: $1,200
• Average cost basis: ~$31,677 (below the start price)
• Final portfolio value: ~$947
• Lump sum result: $750 (all bought at $40,000)
• DCA beats lump sum by ~$197 in a bear market

Even though both strategies lose money when the price falls, DCA loses significantly less than lump sum because later purchases accumulate coins at much lower prices. This downside protection is the core argument for DCA in volatile markets.

Example 3 — Impact of Exchange Fees

• $500/month × 24 months = $12,000 total
• At 0.1% fee: fees total ~$12.00 — negligible
• At 1.5% fee (typical retail exchange): fees total ~$180.00
• At 3.5% fee (credit card crypto purchase): fees total ~$420.00

Fee rate has a dramatic compounding effect over a multi-year DCA plan. Using a low-fee exchange (0.05–0.1% per trade) versus a high-fee platform (2–4%) can mean hundreds or thousands of dollars in savings over a 2–5 year DCA program.