Loophole Calculator
Calculates bullet path offset versus line of sight when shooting through windows, ports, or small openings.
All Tools →Calculates the gap between line of sight and bullet path when shooting through a window, port, or small opening. At close range to the aperture, scope height over bore and dialed elevation create an offset between where the crosshair points and where the round impacts.
Enter height over bore, distance to the loophole, the elevation dialed for the target, and the size of the opening in centimeters. The calculator shows exactly where that gap is and whether the round will clear the obstacle.
The visual display shows the sight picture with the aperture and bullet path overlaid, updating as inputs change.
Includes a range estimation tab for mil-based calculations and a unit conversion tab for metric/imperial.