Rifle & Scope Calculators
Trajectory, wind drift, MOA and mil math, twist rate, and everything else that lives between the muzzle and the target.
Bullet Drop / Trajectory Calculator
Drop, wind drift, velocity, and energy at any range, using the standard G1 drag model.
Open calculator →Muzzle / Downrange Energy & Momentum
Kinetic energy and momentum from bullet weight and velocity.
Open calculator →MOA / Mil Calculator
Convert between MOA, mils, inches, and scope clicks at any range.
Open calculator →Maximum Point-Blank Range
The farthest zero that keeps your bullet inside a chosen kill-zone radius, no holdover needed.
Open calculator →Twist Rate & Bullet Stability
Miller stability formula: check whether a barrel twist will stabilize a given bullet.
Open calculator →Sectional Density Calculator
Sectional density from bullet weight and diameter.
Open calculator →Ballistic Coefficient Estimator
Estimate G1 BC from sectional density and a form factor, or true one from two chronographed velocities.
Open calculator →Wind Drift Calculator
Crosswind drift at a given range, using the standard lag-time method.
Open calculator →Uphill / Downhill Shot Correction
The cosine-rule correction for elevated or depressed shots.
Open calculator →Sight-In / Zero Correction
How many clicks to move your group onto the bullseye.
Open calculator →Mil-Dot / MOA Range Estimator
Estimate range to a target of known size using its subtension in mils or MOA.
Open calculator →Free Recoil Energy & Velocity Bonus
Recoil energy and velocity using the standard powder-charge recoil formula.
Open calculator →Barrel-Length Velocity Loss (Estimate) Bonus
Rough rule-of-thumb estimate of velocity change from cutting or extending a barrel.
Open calculator →BC Truing from Chronograph Bonus
Back-solve a truer ballistic coefficient from a measured velocity at distance.
Open calculator →Time of Flight & Moving-Game Lead Bonus
How long the bullet is in the air, and how far a moving target travels meanwhile.
Open calculator →Density Altitude Calculator
The altitude your rifle (or engine) effectively "feels," from elevation, temperature, and pressure.
Open calculator →Scope / Binocular Exit Pupil, FOV & Twilight Factor Bonus
Optical numbers that affect how bright and wide your view is.
Open calculator →Cost per Shot / Cost per Hunt Bonus
What each trigger pull — or each hunt — actually costs.
Open calculator →Spin Drift & Coriolis (Long-Range) Bonus
Simplified reference estimate for two very-long-range effects. Full solvers (Kestrel, Applied Ballistics) mod…
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