Stock Average Price & Averaging-Down Calculator
Add every buy lot to find your blended average price, then see how many shares at a new price would move your average to a target.
How the blended average is calculated
Every lot contributes its own cost; the average price is the total cost spread evenly across every share you hold.
100 shares at ₹250, then 50 more at ₹190
Total cost is (100 × ₹250) + (50 × ₹190) = ₹25,000 + ₹9,500 = ₹34,500, across 150 total shares. Dividing gives a blended average of ₹230 per share — lower than the original ₹250 buy, even though you paid more than ₹230 for the majority of your position.
| Lot | Quantity | Price |
|---|---|---|
| Lot 1 | 100 | ₹250 |
| Lot 2 | 50 | ₹190 |
| Blended average | 150 shares | ₹230 |
Common questions
Average price is your total cost across all purchase lots divided by your total number of shares: sum of (quantity × price) for every lot, divided by total quantity. It is a quantity-weighted average, so a large lot at one price pulls the average toward it more than a small lot does.