Average stock price calculator
Your real cost basis after adding to a position
Enter up to four buys as shares and price to get total shares, total cost, and the weighted average price you actually own the position at.
- Average price
- $46
- Total shares
- 150.00
- Total cost
- $6,900
What the inputs mean
- Shares and price per buy
- One row per purchase; blank rows are ignored.
Formula
Worked example
100 at $50, then 50 at $38 → 150 shares at an average of $46.00.
Questions people ask
Does averaging down improve the trade?
It lowers the break-even price and raises the position size at the same time, so it improves the arithmetic and worsens the risk. Size it before you do it.
Limitations
Every result here is arithmetic on the numbers you enter. It carries no view on any specific security, assumes returns are steady when real returns are not, and ignores taxes, slippage and commissions. Use it to size and sanity-check, not to forecast.
Now run it on a real ticker
Score any name free, then bring the number back here.
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Understand the inputs
Autonium publishes research, not recommendations. Scores, factors and written reads describe historical and current data and are not buy or sell advice. Not financial advice. Market data is refreshed on a schedule and may lag. See our methodology and disclosures.