Find the average cost per share after buying the same stock twice at different prices.
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Calculated from your inputs
Average cost per share
Total shares
Total purchase cost
How this is calculated
Weights each purchase by its share count. Excludes brokerage and other charges.
Defaults are editable examples, not current provider quotes. Results are rounded for display. These are scenarios from your inputs, not live market data or investment advice.
About the Stock average calculator
When you buy more of a stock you already own, your cost per share changes. The stock average calculator weights each purchase by the number of shares to give the new average cost.
Enter the price and quantity of both purchases. Brokerage and charges are left out; add them to the prices if you want them included.
Worked example
Example inputs
First purchase price
₹100
First purchase shares
100
Second purchase price
₹80
Second purchase shares
150
Calculated result
Average cost per share
₹88
Total shares
250
Total purchase cost
₹22,000
Why use a Stock average calculator?
See your new break-even price before buying more.
Check the average cost shown by your broker.
Stock average calculator FAQs
What is averaging down?
Buying more shares at a lower price than before, which lowers the average cost. It also increases how much you have in that one stock; a lower average does not change the company’s prospects.
Why is the average not halfway between the two prices?
Because each price is weighted by the number of shares bought at it.
Should charges be included?
For an exact cost basis, yes. Add brokerage and other charges per share to each purchase price.
Does the average cost decide my tax?
Capital gains are calculated from the cost of the specific shares sold, generally on a first-in, first-out basis for demat holdings, not from a simple average.