Position size calculator

How many shares should I buy based on my stop loss?

Shares = (account size × risk per trade) ÷ (entry price − stop price). Decide first how much of the account you will lose if the stop is hit, usually 0.5% to 2%, then let the distance to your stop set the number of shares. A wider stop means fewer shares, not more risk.

    How the calculator works

    1. Risk budget = account × risk per trade. $50,000 × 1% = $500.
    2. Risk per share = entry − stop. $100 − $94 = $6.
    3. Shares = budget ÷ risk per share, rounded down. $500 ÷ $6 = 83 shares, a $8,300 position.

    Put the stop where the trade idea is proven wrong (below support, a moving average, or a volatility multiple), then size the position. Never move the stop to fit a bigger position.

    Why fixed fractional sizing works

    Losing 1% per trade, ten losers in a row cost about 9.6% of the account. Risking 5% per trade, the same streak costs about 40%, which needs a 67% gain to recover.

    On Cluenex: Cluenex stock pages show the price levels that would change the view, which many investors use as their stop.

    Use it on a real stock

    Check any of 1,000 US stocks, free

    No account needed. See the business, the price, insiders and the trend in plain words, with the price that would change our view.

    Want alerts and a watchlist? Create a free account.

    Questions people ask

    How much should I risk per trade?

    Most guides suggest 0.5% to 2% of the account per trade. Lower suits beginners and strategies with long losing streaks.

    Does a stop loss guarantee my maximum loss?

    No. A stop becomes a market order when triggered, and a stock that gaps through it overnight fills at the next available price.

    What if the position is bigger than my account?

    Your stop is very tight. Either use a wider stop with fewer shares or skip the trade; borrowing to fit the size adds risk.

    Education, not investment advice. A calculator is only as good as its inputs.