Stock Average Calculator
Calculate your weighted average share cost across two stock purchases.
How to Use the Stock Average Calculator
Enter each stock purchase price and the number of shares bought at that price. The calculator weights each purchase by share count to estimate the average cost per share across all entries.
Practical Example
If you buy 100 shares at USD 20 and another 50 shares at USD 26, the total cost is USD 3,300 for 150 shares, giving an average cost of USD 22 per share.
Factors That Affect the Result
Additional purchases, partial sales, commissions, taxes, splits and corporate actions can change your real cost basis. This calculator focuses on the weighted purchase-price average.
Frequently Asked Questions
Is average cost the same as current market price?
No. Average cost reflects what you paid, while market price reflects the stock’s current trading value.
Does buying more shares at a lower price reduce the average?
Yes, provided the new purchase price is below the existing weighted average.
Are fees included automatically?
No. Add applicable fees to your purchase costs separately if you want them reflected in your basis.