Total cost
Total cost = old price×qty + new price×qty
Stock Average Price Calculator
Calculate the average cost basis after multiple stock purchases. Instantly see how averaging down or up affects your cost.
Stock Averaging Calculator
Strategic Averaging Analytics
Calculate your new average price after buying more shares.
Current Holding
Additional Buy
Result
New Avg Price
₩9,000
Total Quantity
200주
Total Investment
₩1,800,000
Average cost is the blended purchase price of your shares
When you buy more shares, both total quantity and total invested amount change. This calculator combines current and additional purchases to show the new average price, total shares, and total cost basis.
Formulas
Total shares
Total shares = old quantity + new quantity
Average price
Average price = total cost / total shares
How to use
- Enter the price and quantity of your current position.
- Enter the price and quantity of the planned additional purchase.
- Review the new average cost and total investment before deciding.
Frequently asked questions
Are fees and taxes included?
No. This is a price-and-share average. Add brokerage fees and taxes to find a real break-even level.
Does averaging down make a trade safer?
Not automatically. Average cost is only one number; business quality, risk, and position size still matter.
What about partial sales?
This tool focuses on added purchases. Tax cost basis after sales can depend on local rules and broker accounting.
This tool is for general calculation. Confirm official investment returns and taxable cost basis with your broker or tax authority.