Add the total amount spent on all share purchases
Add any brokerage, taxes, or transaction fees if you want the true average cost
Add the total number of shares purchased
Divide the total cost by the total number of shares
Formula: Average Share Price = Total Cost รท Total Shares
Example: If you spend 1000 on 50 shares and 500 on 25 shares, total cost = 1500 and total shares = 75
Example: Average Share Price = 1500 รท 75 = 20 per share