Bullet Trajectory Calculator

Calculate bullet trajectory angle, estimated muzzle distance, and bullet drop from entry/exit hole positions and distance between surfaces.

Entry Hole Height

Exit Hole Height

Distance Between Surfaces

Bullet Caliber

Tab to move between fields

Trajectory Angle

2.39°

Est. Muzzle Distance12.6 ft

Bullet Drop0.02 in

How to Use This Calculator

Enter Entry Hole Height, Exit Hole Height, and Distance Between Surfaces.
Set Bullet Caliber.
Review the Trajectory Angle (°) result.
Use Est. Muzzle Distance (ft) and Bullet Drop (in) to inform your decision.
Use the chart to visualize the results and explore different scenarios by adjusting inputs.

How the result changes with Entry Hole Height

Entry Hole Height: Height of the bullet entry point from the floor.
Exit Hole Height: Height of the bullet exit point from the floor (or impact on opposite surface).
Distance Between Surfaces: Horizontal distance between the entry and exit surfaces.
Bullet Caliber: Bullet diameter in mm (e.g., 9mm, 5.56mm, 7.62mm).

Trajectory Angle: Downward angle of the bullet path (positive = downward, negative = upward).
Est. Muzzle Distance: Rough estimate of distance from muzzle to entry point.
Bullet Drop: Gravitational bullet drop over the measured distance.

Identify Input Parameters
4 parameters
Entry Hole Height = 5.5, Exit Hole Height = 5, Distance Between Surfaces = 12, Bullet Caliber = 9 = 4 input(s) provided
Calculate Trajectory Angle
Trajectory Angle
2.39 = 2.39
Calculate Est. Muzzle Distance
Est. Muzzle Distance
12.6 = 12.6