Stock Average Calculator
Stock Average Price Calculator – Average Buy Price After Multiple Buys
Last updated: Sep 16, 2026 | 900K Indians search stock average calculator | Example: 100 shares @100 + 100 @200 = 200 shares @150 avg
Formula
Average Price = (Q1*P1 + Q2*P2)/(Q1+Q2). Example: (100*100 +100*200)/200 =30000/200=150.
Example
Bought 100 shares @100 =10K, then 100 @200 =20K, total 200 shares cost 30K, average 150. If current price 180, profit 30*200=6K (20%).
FAQ
How to average down?
Buy more when price falls to lower average. Example: 100@200, price falls to 100, buy 100@100, new avg 150, need only 150 to breakeven vs 200.
Weighted average share-price formula
Average price = total cost of all purchases ÷ total shares. For 100 shares at ₹50 and 200 shares at ₹70, total cost is ₹19,000 and total quantity is 300, so the weighted average is ₹63.33. This is the same mathematical cost-basis concept used when reviewing holdings on brokers such as Zerodha or Groww; brokerage, taxes and other charges are excluded unless separately added.
Averaging down warning
A lower average price does not make a declining company safer. Use the result as a record of cost, not as a recommendation to buy more.
Calculator questions
Are the results guaranteed?
No. Results are mathematical estimates based on your inputs and exclude market uncertainty or provider-specific rules.
Does the calculator save my data?
The calculation runs in your browser; do not enter account numbers or other sensitive personal information.
Related Tools & Education
Recommended Tools (Affiliate)
We recommend only genuinely useful tools. Affiliate disclosure: We may earn commission if you purchase via our links, at no extra cost to you. This helps us keep free tools free. Learn more
Average buying price after multiple purchases
Use price and quantity for every purchase to calculate the weighted average share price, total quantity and total invested amount. The result is also called average buying price or average stock cost. Brokerage, taxes and exchange charges are not included unless you add them to each lot cost.
After finding the average, use the stop-loss calculator or position-size calculator for risk planning. Averaging down does not guarantee that a falling stock will recover.