Stock Average Price Calculator
Find your average buy price across multiple purchases of the same stock — useful when you average down or accumulate in tranches.
Enter each buy as shares@price, separated by commas or new lines.
What Is a Stock Average Calculator?
A Stock Average Calculator helps you find the average price you paid for a single stock when you bought it in more than one transaction. Indian investors often buy the same share across several lots, for example accumulating a quality stock over months or averaging down when the price falls. Each purchase happens at a different price, so a simple glance at your trades does not tell you the true cost per share.
This tool combines every lot into one weighted average. You enter each purchase as shares at a price, and the calculator returns your blended average buy price along with the total shares held and the total amount invested in rupees. Knowing this number tells you the exact price at which your overall position breaks even before charges.
Average Price Formula and How It Works
The average buy price is the total money spent divided by the total number of shares. It is a weighted average, so larger lots pull the average closer to their price.
- Total cost = sum of (shares x price) for every lot
- Total shares = sum of all shares bought
- Average price = total cost divided by total shares
On the tool you enter each lot in the format shares@price, separated by commas or new lines. For example, 100@150 means you bought 100 shares at ₹150. The calculator parses each entry, multiplies shares by price, adds them up, and divides by the share count.
Worked Example
Suppose you first buy 100 shares of a stock at ₹150, then add 50 more shares at ₹140. The first lot costs 100 x ₹150 = ₹15,000 and the second lot costs 50 x ₹140 = ₹7,000. Your total cost is ₹22,000 for 150 shares. Dividing ₹22,000 by 150 gives an average buy price of about ₹146.67 per share. So even though you bought at two different prices, your real break-even price is ₹146.67.
Why Averaging Matters
Averaging down lowers your break-even when you buy more shares at a price below your earlier purchase, but it also increases the amount of capital at risk in a single stock. Always check whether the lower price reflects a temporary dip or a weakening business before adding more. Remember the average price here is the cost of shares only and does not include brokerage, STT or other charges. Use the related Brokerage Calculator to estimate net cost, and review your position size so no single stock dominates your portfolio.
Frequently Asked Questions
It is the total amount invested divided by the total number of shares. Multiply shares by price for each lot, add these costs together, then divide by the total share count to get the weighted average.
Averaging down means buying more of a stock after its price has fallen below your earlier buy price. This lowers your average cost per share, but it also adds more capital to a position that is currently losing money, so use it with care.
No. It computes the average price of the shares only. For net cost after brokerage, STT, GST and other charges, use our Brokerage Calculator alongside this tool.
Enter each lot as shares@price, for example 100@150, and separate multiple lots with a comma or a new line. The calculator reads every lot and combines them into one average.
Yes. As long as you know the shares and price for each purchase, you can list each transaction and the tool will return your blended average buy price.
It is the price at which your whole position breaks even on the share cost. If the market price is above your average, you are in profit before charges, and if it is below, you are at a loss before charges.