About this calculator
When you buy a stock multiple times at different prices, the average cost determines your breakeven and profit/loss on sale.
How to use this calculator
Enter up to three buy transactions with quantity and price. Average = total invested / total shares.
Frequently asked questions
Does average price include brokerage?
This calculator uses purchase prices only. Add brokerage and charges to each lot for a more accurate cost basis.
Are these calculators free to use?
Yes. All calculators are free, require no signup, and run entirely in your browser.
Results are estimates for planning purposes only — not investment, tax or legal advice. Verify rates on official sources before acting. Compare brokers on our best stock brokers guide or use the brokerage calculator.