Stock Average Calculator (Average Down)

Find your average price per share across several purchases, see your profit at today’s price, and work out how many shares to buy to average down (or up) to a target price.

Your numbers
Result
Average price
—
Total shares
—
Total cost
—
Profit / loss at current price
—
Shares to reach target
—

How to calculate your average share price

Average price = Total amount paid ÷ Total shares

Example: 100 shares at $50 ($5,000) and 50 shares at $44 ($2,200) = 150 shares for $7,200, an average of $48.00.

How many shares to buy to average down

Shares to buy = Current shares × (Current average − Target) ÷ (Target − Buy price)

Holding 150 shares at $48.00 and want an average of $46 by buying at $42? 150 × (48 − 46) ÷ (46 − 42) = 75 shares. The target must sit between your current average and the price you’re buying at.

Averaging down lowers your break-even, but it also increases how much you have in a position that has gone against you. Decide your maximum position size before adding.

Fees aren’t included; add them to the price if you want them in the average. Check the result of selling with the stock profit calculator, or browse all trading calculators. Works the same for crypto: use coin amounts instead of shares.

ChartWatch is independent and not affiliated with TradingView, any broker or exchange. This calculator uses only the numbers you enter and runs in your browser. Results are estimates before taxes and any costs you leave out. It is a calculation tool, not financial advice.

FAQ

How do I calculate average cost per share?
Add up the total amount you paid for all purchases and divide by the total number of shares.
How many shares do I need to buy to average down?
Shares to buy = current shares × (current average − target average) ÷ (target average − new buy price). The new buy price must be below your target.
Can I use this for crypto?
Yes. Enter coin amounts instead of shares and the price per coin; the maths is the same.
Does averaging down reduce risk?
No. It lowers your average price, but you hold more of something that has fallen, so a further drop costs more.

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ChartWatch is an independent tool and is not affiliated with, endorsed by, or officially connected to TradingView, Inc. “TradingView” is a trademark of its respective owner. Exchange, broker and platform names are trademarks of their respective owners.