Stock Average Calculator – Weighted Purchase Cost
Find weighted average acquisition cost from matching share quantities, prices and total fees.
Formula
Average = (Σ quantity×price + total fees) / Σ quantity.
Total acquisition fees = 0
How to use
- Enter positive quantities separated by semicolons.
- Enter one matching price per quantity and total fees.
- Read total shares and average acquisition cost.
Examples
- 10 shares at 100 and 20 at 80 cost 2600 total; average 86.6667.
Frequently asked questions
Can I enter fractional shares?
Yes. Use decimal points and no thousands separators in the lists.
Is this my taxable cost basis?
Not necessarily. Tax-lot and average-basis rules vary; this is an acquisition average only.
Does it handle sales or stock splits?
No. Use purchases of the same security in one currency, adjusted consistently before entry.
Sources
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