Markets
Stock Average Calculator
Work out your weighted average purchase price across multiple buy transactions.
About the Stock Average Calculator
When you buy the same stock at different prices, your break-even is the weighted average price — total money spent divided by total shares held. Investors often "average down" by buying more at lower prices to reduce this figure.
Average price = Σ(quantity × price) / Σ(quantity)
Frequently asked questions
Is averaging down a good strategy?
It lowers your break-even but increases exposure to a falling stock — sensible only if your conviction in the business is unchanged.
Does this match my broker's average price?
Brokers show the same weighted average for open positions, though theirs may include brokerage and charges in the cost.