Shooting Calculators
A layman's guide
Field calculations for the hunter and rifle-shooting enthusiast
Each tool below runs directly in your browser and updates as values are entered.
Calculator Index
Choose a shooting tool
MOA Conversion
Inches to MOA
Convert a measured group size in inches to minutes of angle at a given distance.
MOA Conversion
MOA to inches
Convert a group spread, bullet drop, windage adjustment, or target size from MOA to inches.
Prediction Tool
Percent hits predictor
Estimate theoretical vital-zone hit likelihood at a new distance using known index precision and accuracy.
Angle Correction
Extreme incline distance
Calculate effective horizontal shooting distance when the line of sight rises or falls sharply.
Rifleman's Rangefinder
Target distance estimator
Estimate range using a known object size and the angle it subtends in MOA-ready optics.
Further Reading
Wind and ballistics references
Wind and cartridge considerations require more context than a single field formula. The restored Hillcrest primer notes are available below.
Open ballistics primer