Stock Average Calculator
Calculate your average buy price across multiple stock purchases.
Inputs
Live₹
₹
₹
Results
Average cost/share
₹440.00
Total shares
250
Total invested
₹1.10 L
Unrealised P&L
₹2.5 K
Profit
Overview
The stock average calculator computes your average buy price when you purchase shares of the same stock at different prices and quantities — useful for tracking your break-even point after averaging down or up.
How to use this calculator
- Enter the quantity and price for each stock purchase (add as many transactions as needed).
- The calculator shows the total shares held, total amount invested, and average cost per share.
- Enter the current market price to see your unrealised profit or loss.
Understanding the inputs & results
Average cost per share
Total amount invested ÷ Total shares purchased. Your effective break-even price.
Averaging down
Buying more shares at a lower price to reduce your average cost per share.
Averaging up
Buying more shares at a higher price — increases average cost but adds to a winning position.
Unrealised P&L
Profit or loss based on the current market price vs your average cost, before you sell.
The formula
Weighted average cost
Average Price = Σ(Quantity × Price) / Σ(Quantity)
Sum of (quantity × price) for all purchases divided by total quantity gives the weighted average cost per share.
Worked example
Bought 100 shares at ₹500 and 150 shares at ₹400.
- Total invested = (100 × 500) + (150 × 400) = 50,000 + 60,000 = ₹1,10,000.
- Total shares = 100 + 150 = 250.
- Average price = 1,10,000 / 250 = ₹440.
✓ Average cost per share = ₹440. Break-even at current price ₹440.
Frequently asked questions
Average price calculations are for informational purposes only and not investment advice. Consult your broker or financial advisor for accurate cost-basis reporting.