Position Size Calculator
Calculate optimal position sizes, risk, and reward across 6 asset classes. Never risk more than you should on a single trade.
Stock Position Calculator
Tip: Most professional traders risk 1-2% of their account per trade. The calculator determines how many shares you can buy while keeping your risk within the specified percentage.
Enter your trade parameters to calculate position size
How to Use a Position Size Calculator
Position sizing is the foundation of risk management. Before entering any trade, you need to know exactly how many shares, lots, contracts, or tokens to buy. Our calculator takes your account balance, risk tolerance, entry price, and stop loss — then tells you the precise position size that keeps your risk within bounds.
The 1-2% Rule
Professional traders rarely risk more than 1-2% of their account on a single trade. This means on a $10,000 account, your maximum loss per trade should be $100-$200. Our calculator enforces this discipline by showing you the exact position size that matches your risk budget.
Supported Markets
Our calculator supports stocks, forex (10 major pairs with auto pip values), futures (15 contracts including ES, NQ, MNQ, CL, GC), cryptocurrency with leverage up to 125x, and options with 6 strategy types. Each calculator is tailored to the specific mechanics of that asset class.