Ballistic Calculator (Educational Model)
Enter your values below to estimate trajectory, time of flight, retained energy, and wind drift. This uses a simplified physics model designed for learning and planning.
What Is a Ballistic Calculator?
A ballistic calculator estimates how a projectile travels through the air over distance. At the most basic level, it answers practical questions like: How long will it take to get there?, How much will gravity pull it down?, and how much speed and energy remain at the target distance? Those estimates are useful for anyone studying external ballistics, physics, and trajectory behavior.
The tool above is intentionally streamlined. It combines core inputs—velocity, ballistic coefficient, distance, and wind—into a clean output that includes drop, correction values in MOA and MIL, velocity at range, and approximate drift.
How This Calculator Works
This page uses a simplified point-mass model. Instead of trying to reproduce every atmospheric and aerodynamic detail, it computes projectile flight in small distance increments, applying drag loss and gravity over time. That gives a practical estimate while keeping the logic transparent and fast enough to run directly in your browser.
Included in the model
- Gravity-driven vertical drop over computed time of flight
- Velocity decay based on ballistic coefficient (G1-style approximation)
- Estimated crosswind drift using time-of-flight scaling
- Impact energy estimate from bullet weight and retained velocity
Not included (by design)
- Temperature, pressure, and humidity corrections
- Spin drift, Coriolis effect, and aerodynamic jump
- Angle fire (uphill/downhill) and moving-target lead
- Chronograph-to-lot variation and barrel-specific harmonics
Understanding the Inputs
Muzzle Velocity (fps)
This is your starting speed at the muzzle. Small differences here can noticeably change drop and drift predictions at longer ranges.
Ballistic Coefficient (G1)
BC represents how efficiently a projectile moves through air. Higher BC generally means better velocity retention and less wind sensitivity.
Bullet Weight (grains)
Used for calculating retained kinetic energy. Heavier projectiles with similar velocity usually carry more energy downrange.
Sight Height and Zero Range
These establish your reference line of sight. The calculator estimates correction relative to that zero.
How to Use This Page Effectively
- Start with realistic measured data (especially velocity).
- Set a target range and compare drop in both inches and turret units (MOA/MIL).
- Use the trajectory table to understand trend across distance, not just one point.
- Recalculate after changing one variable at a time to see sensitivity.
Interpreting Output Quickly
If the drop value is positive, the projectile is below line-of-sight and requires upward correction (hold or dial). MOA and MIL are angular corrections derived from the same drop estimate. Time of flight helps explain why wind drift grows with distance: the longer the projectile is in flight, the more opportunity wind has to move it laterally.
Important Notes on Accuracy and Safety
This is an educational calculator, not a certified firing solution system. Real-world results can vary due to atmosphere, manufacturing tolerances, measurement error, and setup differences. Always validate predictions with controlled testing and follow all applicable laws, rules, and safety protocols.