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Our free Stock Average Calculator helps you quickly compute the weighted average buy price of a stock or asset purchased in multiple lots. Whether you're averaging down, averaging up, or tracking a systematic investment plan (SIP) — get the true average cost per share instantly.

1

Enter the 1st Buy Price

Type the price per share at which you made your first purchase (e.g., ₹150.00 or $50.00).

2

Enter the 1st Quantity

Type the number of shares or units bought at the first price.

3

Enter the 2nd Buy Price

Type the price per share for your second purchase.

4

Enter the 2nd Quantity

Type the number of units bought at the second price. The tool computes the weighted average across both lots.

5

Click Calculate

Hit Calculate to instantly see your average buy price, total invested amount, and total quantity.

6

Reset & Recalculate

Use Reset to clear all fields and compute a fresh average for a different stock.

Weighted Average Price Formula
Avg Price = (P1×Q1 + P2×Q2) ÷ (Q1 + Q2)
Multiply each price by its quantity

For each lot: P1 × Q1 and P2 × Q2.

Sum the total cost

Total Cost = (P1 × Q1) + (P2 × Q2)

Sum the total quantity

Total Qty = Q1 + Q2

Divide total cost by total quantity

Avg Price = Total Cost / Total Qty

Example: Buy 100 shares @ ₹200 + 150 shares @ ₹160 → Avg = (100×200 + 150×160) / 250 = ₹176.00

Averaging Down (Stock Market)

When a stock falls, buy more at a lower price to reduce your overall cost basis and break-even point.

Systematic Investment Plans

Calculate the running average NAV of recurring SIP investments in mutual funds or ETFs.

Crypto DCA Strategy

Dollar-Cost Averaging into Bitcoin or altcoins — track your blended purchase price.

Inventory Management

Calculate weighted average cost of goods for AVCO accounting in retail businesses.

Portfolio Rebalancing

Know your true cost basis when adding to an existing position to assess unrealised P&L.

Learning Finance

Students can verify textbook weighted average cost exercises instantly.

A stock average calculator computes the weighted average price of shares bought at different prices and quantities, giving a single blended cost per share to compare against the current market price.

Averaging down means buying more shares as the price falls, reducing the average cost per share so you reach break-even sooner when the stock recovers.

Not always. It works for temporary dips in strong companies but can amplify losses in fundamentally weak ones. Always research before averaging down.

Currently it supports 2 purchase lots. For more, use the result of the first two as the price/quantity for lot 1, then add lot 3.

Simple average ignores quantity. Weighted average accounts for the number of shares at each price, giving a more accurate true cost basis.

Yes. Enter the NAV as the price and number of units purchased as the quantity for each SIP instalment.

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