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Ballistic Trajectory Calculator

A free ballistic calculator that computes bullet drop, wind drift, retained velocity and energy, and MOA or MIL scope come-ups at any distance. Enter a load's muzzle velocity, ballistic coefficient, and zero to get a full trajectory table plus drop, velocity, and energy charts you can export to PDF or CSV.

What it calculates

• Bullet drop (inches) and holdover at each range
• Wind drift for a given crosswind speed and angle
• Retained velocity (fps) and energy (ft-lb) downrange
• Elevation and windage corrections in MOA or MIL, plus turret clicks

Inputs

Muzzle velocity, a matching G1 or G7 ballistic coefficient, bullet weight, zero distance, sight height, and atmospheric conditions — temperature, altitude, barometric pressure, and humidity — plus wind speed and angle and optional barrel-twist inputs.

How the calculation works

The engine integrates a 2D point-mass trajectory using the selected G1 or G7 drag function when a usable matching BC is supplied, corrects drag for air density from the atmospheric inputs, and solves the launch angle numerically for the zero. See the methodology for the full model and its limits.

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