DCA Cost Basis Calculator
Add up all your purchases to find your blended average price and profit or loss.
Purchases
Enter a current price to also calculate value and profit/loss.
Result
Enter a buy price and quantity to see your average price.
Frequently Asked Questions
A Complete Guide to Dollar-Cost Averaging
Average price = total invested ÷ total quantity
What is DCA?
Dollar-cost averaging (DCA) is the practice of buying an asset in multiple purchases over time rather than in one lump sum. Investing the same amount each time means you buy more when prices are low and less when they are high, which flattens your average cost. Its biggest advantage is that you do not need to predict short-term market moves.
Benefits of DCA
The core benefit of DCA is reducing timing risk. It avoids the worst-case scenario of committing everything at a market top, and it lets you keep buying mechanically through downturns to lower your average cost. It also keeps you disciplined and emotionally steady by following a predefined plan instead of reacting to fear or greed.
How to use DCA well
DCA works especially well for high-quality assets or broad index ETFs expected to rise over the long term. Decide your interval and amount in advance and execute without flinching. Enter each purchase in this calculator to see exactly how every buy shifts your average price and what your profit or loss is at the current price. That said, if a decline reflects broken fundamentals, avoid forcing additional buys.