Stock Average Price Calculator

Find your average cost per share after buying the same stock at different prices (averaging down or up).

Average cost per share
45.00
Total shares
200
Total cost
9,000.00

Formula

Average cost = (Shares₁ × Price₁ + Shares₂ × Price₂ + …) ÷ Total shares

About this calculator

When you buy a stock in several lots, your break-even price is the weighted average of the purchase prices. Leave the third purchase at zero if you only bought twice.

Amounts are shown without a currency symbol, so the calculator works for any currency: enter all values in the same one.

Frequently asked questions

Does averaging down reduce risk?

It lowers your average cost, but it also increases the money you have in one stock. It only helps if the price later recovers.

Should I include commissions?

For a precise break-even, add the commission per share to each purchase price.

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