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Finance Calculators

Stock Average Calculator

Verified formula Updated Jun 2026 Private — runs on your device

Enter details
₹
₹
Verified formula Private

Average price per share

₹45.00

Total shares
200
Total invested
₹9,000

For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.

How to use the Stock Average Calculator

The Stock Average Calculator works out your average price per share, along with 2 related figures in an instant. Enter first purchase quantity, first purchase price and second purchase quantity and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.

  1. Enter the first purchase quantity.
  2. Enter the first purchase price.
  3. Enter the second purchase quantity.
  4. Enter the second purchase price.
  5. Read off your average price per share, together with total shares and total invested — the calculator updates automatically, with no button to press.

Formula

The Stock Average Calculator uses the formula:

Average price per share = (First purchase quantity × First purchase price + Second purchase quantity × Second purchase price) ÷ (First purchase quantity + Second purchase quantity)

Worked example

For example, with first purchase quantity of 100, first purchase price of ₹50, second purchase quantity of 100 and second purchase price of ₹40, the average price per share is ₹45.00.

Inputs used
First purchase quantity 100
First purchase price ₹50
Second purchase quantity 100
Second purchase price ₹40
Results
Average price per share ₹45.00
Total shares 200
Total invested ₹9,000

Results are estimates for educational use, not professional advice.

Key terms explained

Mean
The average of a set of numbers — their sum divided by how many there are.

Frequently asked questions

Divide the total amount invested by the total shares. Buying 100 at 50 and 100 at 40 gives an average of 45.

It means buying more of a stock at a lower price to reduce your average cost. It lowers the break-even price but increases your stake.

It can be if the investment case is still sound, but it adds money to a losing position, so it carries extra risk.

No. For an exact average cost, add brokerage and charges to each purchase amount before averaging.

Enter the first purchase quantity. Enter the first purchase price. Enter the second purchase quantity. Enter the second purchase price. Read off your average price per share, together with total shares and total invested — the calculator updates automatically, with no button to press.

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