Average Cost Calculator
Calculate your cost basis after averaging down or averaging up across multiple buys.
Purchases
SharesPrice / Share
Total Shares
30
Total Cost
$2,600.00
Average Cost
$86.67
Market Value
$2,700.00
Unrealized P/L
$100.00
How averaging works
Average cost = total money spent ÷ total shares owned. Adding lower-priced buys reduces your average cost basis. This tool is useful for dividend and growth investors tracking DCA or average-down strategies.