Position Size Calculator
Risk a fixed percentage of your account on every trade. Enter your account size, the percent you're willing to lose, and your entry and stop — this returns the exact position size.
FAQ
How is position size calculated?
Position size = (account × risk%) ÷ (distance from entry to stop × contract multiplier). It's the largest size where hitting your stop loses exactly your chosen risk amount.
What risk % should I use?
Most disciplined traders risk 0.5–2% of their account per trade. Smaller risk survives longer losing streaks.
Does it work for options and futures?
Yes — set the multiplier (100 for equity options, the $/point value for futures, e.g. 50 for ES).