Stock Average Price Calculator

Calculate average cost, total shares, break-even price, and profit or loss after multiple stock purchases.

Average cost inputs

Combine existing holdings with a new purchase to estimate average cost and break-even price.

New average price

$42.01

Total shares

150

Total cost basis

$6,302

Unrealized result

-$2

-0.03% at current price

Estimated new fees

$1.8

Average cost change

-6.64%

Compared with the old average price.

Existing cost

$4,500

New purchase cost

$1,802

Market value

$6,300

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How average cost changes

Average cost combines the cost basis of existing shares with any new purchase. Buying below your current average lowers the break-even price, while buying above it raises the average cost.

Checking the break-even point

Use the current market price to estimate unrealized gain or loss after the new purchase. Brokerage fees are included in the cost basis so the result is closer to the real break-even price.