How to compute the average price you paid for a position

1. Enter total cost

   "Total cost" is the sum of every buy you've made for this position, including commissions and fees if you want "all-in" cost basis. Use the same currency you'll quote the price back in.

2. Total shares accumulated

   "Shares" is the total number of shares you currently hold from those buys. Zero shares throws "Shares cannot be 0." — there's no "average price" without a position.

3. Press Run

   Result is averagePrice = totalCost / shares, rounded to 6 decimals. This is dollar-cost-average (DCA) for cost basis — useful for tax-lot tracking and break-even analysis.

4. Excludes sells and dividends

   The tool doesn't model partial sells (which would reduce both cost basis and share count) or reinvested dividends. For a real broker-style cost basis with multiple tax lots, use a portfolio tracker.