How it works
A stop price is a trigger level; the eventual execution price may differ. The displayed loss is an estimate at that level, not a guaranteed maximum loss.
The formula
Keep currency, units and time periods consistent. Percentage inputs use percentage points (enter 5 for 5%). Results are rounded only for display; tiny nonzero values may use scientific notation. Undefined ratios are shown as unavailable.
A long at $100 with a 2% stop produces a $98 stop price. Risk is $2 per unit; 50 units have a $100 estimated gross loss at that price.
Calculation method
For a long position the stop must be below entry; for a short it must be above entry. Percentage mode computes this directional relationship. Price mode checks the relationship you enter.
Interpretation
A maximum-loss budget gives a compatible quantity under the price and cost assumptions. A positive fixed budget overrides balance times risk percentage. Use Position Size to add contract multipliers and broker increments.
Method and reference sources
Method and content checked 2026-09-20. These sources provide background, not endorsement or professional certification. The formula and limitations above define this calculator.
- CME Group — Calculating futures profit or lossContract size and price-movement context; verify your broker or exchange specification separately.
- Investor.gov — Understanding FeesInvestment fee and compounding context; enter the terms of your fund or account.
Frequently asked questions
Is the displayed stop price an execution guarantee?
No. It is a mathematical level from your risk inputs. An order can fill at a different price during gaps or thin trading.
What is a worked example for Stop Loss?
A long at $100 with a 2% stop produces a $98 stop price. Risk is $2 per unit; 50 units have a $100 estimated gross loss at that price.