Position Size Calculator
Calculate position size from account balance, risk percentage, entry price, and stop loss. Get share count, total position value, and planned risk.
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Position Size shares / units
Risk Amount $100.00 max planned loss
Position Value $2,000.00 capital deployed
Risk Per Share
Account Exposure 20.0%
Rounded Position $2,000.00
Position Size Formula
Risk amount = Account size x Risk %
Risk per share = Entry price - Stop loss
Position size = Risk amount / Risk per share
Frequently Asked Questions
- A common formula is Position size = Risk amount / Risk per share. Risk amount is your account size multiplied by your risk percentage, and risk per share is the difference between entry price and stop loss.
- Many traders risk 1% or less of account equity per trade. Lower risk percentages can help reduce drawdowns and keep a losing streak from damaging the account too quickly.
- A wider stop loss increases risk per share, so you must buy fewer shares to keep total risk the same. A tighter stop lets you take a larger position at the same risk percentage.
- This version is built around price-based position sizing for stocks, crypto, and CFDs. For forex-style sizing with pip value, use the related Lot Size Calculator.
- Risk per share is Entry price - Stop loss for a long trade. If you enter at $50 and place your stop at $47, your risk per share is $3.
- First decide how much money you are willing to lose if the stop is hit. Then divide that risk amount by the dollar risk per share or unit to get the position size.
- Yes. Most traders round down to avoid risking more than planned. Rounding up can push total risk above your target, especially on small accounts.
- Position size is the total number of shares, units, or contracts you trade. Lot size is the broker-specific unit grouping, especially common in forex and futures.