Stock Position Sizing Calculator

Use the Free Calculator below to quickly work out how many shares of a stock or ETF you should buy or sell to achieve your desired position size.

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First enter your current account value, then enter the desired % of your account you want in the stock, then enter the current price of the stock or ETF, then it will show you how many shares to buy or sell.

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If your account is in a currency other than USD and you're trading USD products you should first convert your account balance into USD using the currency converter below.

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We use 7.50% position size for our long and short trading strategy which you can follow.