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External Ballistics Calculator - Borst Engineering & Construction LLC
Atmosphere Standard (1=Army Metro, 2=ICAO)
Bullet Coefficient of Drag Standard (1=G1, 2=G2, 5=G5, 6=G6, 7=G7, 8=G8, 9=GS, 10=RA4, 11=GL, 12=GI)
Bullet Ballistic Coefficient (PSI)
Bullet Ballistic Coefficient Speed (FPS if known or leave blank)
Bullet Diameter (Inches)
Bullet Length (Inches)
Bullet Weight (Grains)
Gun Barrel Rifling Twist Rate (Inches per Turn, Left-hand Twist is Negative)
Gun Sight Height (Inches)
Gun Muzzle Velocity (FPS)
Gun Zero Range (Yards)
Requested Specific Range (Yards)
Requested Elevation/Windage Units (1=Inches, 2=IPHY, 3=MILS, 4=MOA)
Altitude (Feet or In Hg)
Temperature (Degrees F)
Relative Humidity (%)
Wind Speed (MPH)
Wind Direction (O'clock, Headwind is 12)
Terrain Inclination Angle (Degrees, Downhill Target is Negative)
Latitude (Degrees, South is Negative)
Target Azimuth Angle (Degrees, Measured Clockwise & North is 0)
Gyroscopic Spin Drift (0=No, 1=Yes)
Maximum Range Criteria (0=No Max Range Limit, 1=Min Speed, 2=Min Energy, 3=Max Time of Flight, 4=Max Point Blank Range)
Maximum Range Criteria Value (FPS, Ft-Lbs, Seconds or Inches)
Laser Target Range (Yards)
Departure Angle (Normally Leave Blank or Minutes)
Bullet Speed at Requested Specific Range (FPS)
Bullet Energy at Requested Specific Range (Ft-Lbs)
Bullet Elevation at Requested Specific Range
Bullet Windage at Requested Specific Range
Bullet Time of Flight at Requested Specific Range (Seconds)
Maximum Range (Yards)
Bullet Speed at Muzzle (FPS)
Bullet Energy at Muzzle (Ft-Lbs)
Bullet Elevation at Muzzle
Bullet Windage at Muzzle
Bullet Time of Flight at Muzzle (Seconds)
Bullet Speed at 25 Yards (FPS)
Bullet Energy at 25 Yards (Ft-Lbs)
Bullet Elevation at 25 Yards
Bullet Windage at 25 Yards
Bullet Time of Flight at 25 Yards (Seconds)
Bullet Speed at 50 Yards (FPS)
Bullet Energy at 50 Yards (Ft-Lbs)
Bullet Elevation at 50 Yards
Bullet Windage at 50 Yards
Bullet Time of Flight at 50 Yards (Seconds)
Bullet Speed at 75 Yards (FPS)
Bullet Energy at 75 Yards (Ft-Lbs)
Bullet Elevation at 75 Yards
Bullet Windage at 75 Yards
Bullet Time of Flight at 75 Yards (Seconds)
Bullet Speed at 100 Yards (FPS)
Bullet Energy at 100 Yards (Ft-Lbs)
Bullet Elevation at 100 Yards
Bullet Windage at 100 Yards
Bullet Time of Flight at 100 Yards (Seconds)
Bullet Speed at 200 Yards (FPS)
Bullet Energy at 200 Yards (Ft-Lbs)
Bullet Elevation at 200 Yards
Bullet Windage at 200 Yards
Bullet Time of Flight at 200 Yards (Seconds)
Bullet Speed at 300 Yards (FPS)
Bullet Energy at 300 Yards (Ft-Lbs)
Bullet Elevation at 300 Yards
Bullet Windage at 300 Yards
Bullet Time of Flight at 300 Yards (Seconds)
Bullet Speed at 400 Yards (FPS)
Bullet Energy at 400 Yards (Ft-Lbs)
Bullet Elevation at 400 Yards
Bullet Windage at 400 Yards
Bullet Time of Flight at 400 Yards (Seconds)
Bullet Speed at 500 Yards (FPS)
Bullet Energy at 500 Yards (Ft-Lbs)
Bullet Elevation at 500 Yards
Bullet Windage at 500 Yards
Bullet Time of Flight at 500 Yards (Seconds)
Bullet Speed at 600 Yards (FPS)
Bullet Energy at 600 Yards (Ft-Lbs)
Bullet Elevation at 600 Yards
Bullet Windage at 600 Yards
Bullet Time of Flight at 600 Yards (Seconds)
Bullet Speed at 700 Yards (FPS)
Bullet Energy at 700 Yards (Ft-Lbs)
Bullet Elevation at 700 Yards
Bullet Windage at 700 Yards
Bullet Time of Flight at 700 Yards (Seconds)
Bullet Speed at 800 Yards (FPS)
Bullet Energy at 800 Yards (Ft-Lbs)
Bullet Elevation at 800 Yards
Bullet Windage at 800 Yards
Bullet Time of Flight at 800 Yards (Seconds)
Bullet Speed at 900 Yards (FPS)
Bullet Energy at 900 Yards (Ft-Lbs)
Bullet Elevation at 900 Yards
Bullet Windage at 900 Yards
Bullet Time of Flight at 900 Yards (Seconds)
Bullet Speed at 1000 Yards (FPS)
Bullet Energy at 1000 Yards (Ft-Lbs)
Bullet Elevation at 1000 Yards
Bullet Windage at 1000 Yards
Bullet Time of Flight at 1000 Yards (Seconds)
Barometric Pressure (In Hg)
Temperature (Degrees F)
Relative Humidity (%)
Air Density Ratio
Air Density (PCF)
Speed of Sound (FPS)
Bullet Sectional Density (PSI)
Bullet Form Factor
Bullet Coefficient of Drag
Bullet Stability Factor (NR or 1.4 or greater recommended)
Bullet Initial Intercept Range (Yards)
Laser Target Range (NR or Yards)
Laser Height (NR or Inches)
Departure Angle (Minutes)
Borst Engineering & Construction LLC
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