Stock Average Calculator
Calculate the weighted average price of stock purchases across multiple buys with optional commission costs
Your Purchases
A flat fee charged on each buy trade, added to your total cost
| # | Buy Price ($) | Quantity (shares) | Subtotal | |
|---|---|---|---|---|
| Total Cost | $0.00 | |||
Average Price Results
Break-even Price
The price at which selling all shares recovers your entire cost basis (including fees if enabled).
How we calculated this
What if?
Each row recalculates with your current inputs. Tap a row to apply it.
Compare two plans
Add your purchases to calculate the average
Enter the buy price and quantity for each purchase above
Check the weighted average with purchase fees
Buy 50 shares at 100 and 100 shares at 80: total purchase cost = 13,000, shares = 150, average = 86.67. With a fee of 10 on each of the two buys, the cost becomes 13,020 and the average becomes 86.80.
Average = (sum of price × quantity + enabled purchase fees) ÷ total shares. Fractional shares use the same weighting. Enter every buy in the same currency and keep share quantities on the same basis after a split.
The displayed break-even excludes future selling fees, taxes and currency conversion. This is a purchase-cost estimate; it does not select tax lots, account for sales or determine a tax-reporting basis.
Authoritative sources and references
The official standards, guidelines, and research behind this calculator's methodology.
Stock Average Calculator FAQ
How do I calculate the average price of a stock after multiple buys?
Add up the total cost of every purchase (price × quantity for each buy) and divide by the total number of shares. For example, buying 50 shares at $100 and 100 shares at $80 gives a total cost of $13,000 for 150 shares — an average price of $86.67.
What is averaging down?
Averaging down means buying more shares after the price falls, which lowers your average cost per share. In the example above, the second buy at $80 pulled the average down from $100 to $86.67. It reduces your break-even price but concentrates more capital in one position.
Should commissions be included in the average price?
For a true cost basis, yes — brokers add fees to your purchase cost. Enable the commission option and enter the flat fee per trade; the calculator spreads the fees across all shares automatically.
Does this work for fractional shares?
Yes. Enter decimal quantities (for example 0.5 or 2.75 shares) and the weighted average is computed exactly the same way.
Professional financial calculators for home loans, EMIs, taxes, and investment planning in rupees