quantwala

Stock average calculator

Free tool · No login required

Your average buy price.
And what the next buy does.

Add every purchase of a stock to get the average price and breakeven. Then see how many shares at a new price would reach the average you want.

01

Your purchases

02

Plan the next buy

Your result

Average buy priceLive estimate

₹1,425.00

Across 20 shares.

Shares20
Invested₹28,500
Breakeven₹1,425.00
NEXT BUY

To bring your average to ₹1,400.00, buy about 5 shares at ₹1,300.00: ₹6,500 more. Your holding becomes 25 shares.

Averaging down adds money to a position that is falling. A lower average does not make the stock more likely to recover; decide on your own research.
Average price = total amount invested ÷ total shares. Brokerage and taxes are not included in the average. Educational estimate, not investment advice. Reviewed 6 October 2026.

Frequently asked questions

How is the average price of a stock calculated?

Multiply each purchase price by its quantity, add those amounts, and divide by the total number of shares. That is the average buy price, which is also your breakeven before charges.

How many shares do I need to buy to reach a target average?

With Q shares at an average A, buying N more at price X gives a new average of (Q×A + N×X) ÷ (Q + N). Solving for N gives N = Q × (A − target) ÷ (target − X). The calculator does this for you.

Is averaging down a good idea?

It lowers your average, but it also puts more money into a position that has been falling. A lower average does not make a recovery more likely. Decide based on your own research, not on the average alone.

Does the average include brokerage and taxes?

No. It uses the prices you enter. Brokerage, STT, stamp duty and DP charges raise your real breakeven slightly; the charges calculator estimates them.

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