Average Down / DCA Calculator

Free average down and dollar-cost averaging calculator. Enter multiple buy lots to see your blended cost basis, breakeven price, and unrealized P&L.

Find Your Blended Cost Basis Across Multiple Buys

Enter each buy lot and the calculator returns your average cost and new breakeven price. Add a current price to also see your unrealized P&L and percent return.

Understand a Position Before You Add to It

Averaging down changes your breakeven and your risk. Run the numbers first, then track the position in TradeTally to keep your cost basis and performance in one place.