Average buy price across purchases. The Stock Average Price Calculator takes quantity bought (lot 1), price per share (lot 1), quantity (lot 2), price (lot 2), quantity (lot 3), price (lot 3) and returns average buy price plus total shares, total invested. Results update as you type, and the formula is shown under the result so you can repeat it in your own spreadsheet.
Investment maths is about comparing money at different points in time on a fair basis. Compound rates, discounting and annualised returns let you compare options of different sizes and durations. Use the worked example below to check the maths against your own figures.
How the Stock Average Price Calculator works
Buying the same stock at different prices gives a weighted average cost, which is the break-even price for the whole position. Leave unused lots at zero.
Worked example
With the example values (quantity bought (lot 1) of 100, price per share (lot 1) of ₹250, quantity (lot 2) of 50, price (lot 2) of ₹200, quantity (lot 3) of 0, price (lot 3) of ₹0), the average buy price is ₹233.33; total shares 150, total invested ₹35,000.00. Change any figure above and the result updates immediately; use Copy results to paste the summary into a note or email.
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Frequently Asked Questions
How is average buy price calculated?
average price = total amount invested ÷ total shares held.
Which figures do I need?
Quantity bought (lot 1), price per share (lot 1), quantity (lot 2), price (lot 2), quantity (lot 3), price (lot 3). Take them from the same period and the same set of accounts or reports so the ratio is consistent, and check the example values as a guide to the units expected.
Does the calculator account for taxes and fees?
Only where there is an input for them. For a true net return, add fees and taxes to your inputs or use the stock and crypto profit calculators, which include them.
