Position size calculator.
Translate an account-level risk limit into a share quantity using entry, stop, and allocation constraints. The output is a planning estimate—not a guarantee of maximum loss or a trade recommendation.
Enter the scenario. Run the math.
The server returns nothing until Calculate is selected. If access is needed, the result gate appears here after your inputs pass validation.
Know what the number means.
01How many shares should I buy?+
The calculator returns the lower quantity permitted by the entered risk budget and allocation cap. The output is arithmetic, not a recommendation to place the trade.
02Why does the stop price matter?+
The distance between entry and stop defines the modeled risk per share. A wider distance permits fewer shares for the same risk budget.
03Does the position-size result guarantee my maximum loss?+
No. Gaps, slippage, liquidity, halts, fees, and execution differences can make realized losses larger than the modeled amount.