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Calculate how many shares to buy based on your account size, risk tolerance, and stop loss. Never risk more than you can afford on a single trade.
Calculate the right position size for any trade — no signup, no ads. Enter your account size, how much you're willing to risk, your entry price, and your stop loss level. Instantly see how many shares to buy, total position value, and maximum dollar risk. Everything runs in your browser — no data stored.
Position sizing determines how many shares (or lots) to buy based on how much you're willing to lose on a single trade. It's the most important risk management tool in trading. Without it, a single bad trade can wipe out weeks of gains.
Most professional traders risk 1-2% of their account per trade. Beginners should start at 0.5-1%. Never risk more than 5% on a single trade. The 1% rule means a $50,000 account risks at most $500 per trade.
Position Size = (Account Size x Risk %) / (Entry Price - Stop Loss Price). For example: $50,000 account, 2% risk, $100 entry, $95 stop loss = ($50,000 x 0.02) / ($100 - $95) = $1,000 / $5 = 200 shares.
Yes. The formula is the same for any market. Enter your account size in your base currency, your entry price, and your stop loss level. The calculator gives you the number of units to trade.