Velocity & Drop

Trajectory, Drop & Wind Calculator

Estimate projectile velocity, bullet path, wind drift and scope correction from muzzle velocity, ballistic coefficient, rifle zero and environmental conditions.

Calculator

Results are calculated from the entered conditions.

Ballistic coefficient Use the same G1 or G7 model stated by the bullet or ammunition manufacturer.

BC drag model

Muzzle velocity Measured chronograph velocity gives a better estimate than box velocity.

Velocity unit

Zero range

Range unit

Sight height Vertical distance from centre of bore to centre of optic.

Sight height unit

Maximum range

Range interval

Target distance

Wind speed

Wind unit

Wind direction method Direction describes where the wind comes from.

Wind clock

Advanced settings

Start range

Bullet mass Required only for remaining energy.

Mass unit

Zero offset

Offset unit

Shooting angle Positive is target above shooter; negative is below.

Main angular unit

Turret click size

Click unit

Atmospheric conditions

Standard atmosphere

Temperature

Temperature unit

Station pressure at the shooting location

Pressure unit

Relative humidity

Weather services often show sea-level corrected pressure. Use station pressure when measured at the shooting location.

Trajectory chart

Trajectory table

Corrections shown in MRAD

Range	Path	Elevation	Wind drift	Wind correction	Velocity	Energy	Flight time
0.0 m Path -4.5 cm Elevation - Wind drift 0.0 cm center Wind correction - Velocity 800 m/s / 2,625 fps Energy Mass required Flight time 0.000 s Mach 2.35 0.0 m	-4.5 cm	-	0.0 cm center	-	800 m/s / 2,625 fps	-	0.000 s
50.0 m Path -0.2 cm Elevation 0.04 MRAD UP Wind drift 0.5 cm left Wind correction 0.09 MRAD RIGHT Velocity 771 m/s / 2,531 fps Energy Mass required Flight time 0.064 s Mach 2.27 50.0 m	-0.2 cm	0.04 MRAD UP	0.5 cm left	0.09 MRAD RIGHT	771 m/s / 2,531 fps	-	0.064 s
100 m Path -0.0 cm Elevation 0.00 MRAD UP Wind drift 1.9 cm left Wind correction 0.19 MRAD RIGHT Velocity 743 m/s / 2,438 fps Energy Mass required Flight time 0.130 s Mach 2.18 100 m	-0.0 cm	0.00 MRAD UP	1.9 cm left	0.19 MRAD RIGHT	743 m/s / 2,438 fps	-	0.130 s
150 m Path -4.3 cm Elevation 0.28 MRAD UP Wind drift 4.3 cm left Wind correction 0.29 MRAD RIGHT Velocity 716 m/s / 2,348 fps Energy Mass required Flight time 0.198 s Mach 2.10 150 m	-4.3 cm	0.28 MRAD UP	4.3 cm left	0.29 MRAD RIGHT	716 m/s / 2,348 fps	-	0.198 s
200 m Path -13.3 cm Elevation 0.67 MRAD UP Wind drift 7.8 cm left Wind correction 0.39 MRAD RIGHT Velocity 688 m/s / 2,259 fps Energy Mass required Flight time 0.269 s Mach 2.02 200 m	-13.3 cm	0.67 MRAD UP	7.8 cm left	0.39 MRAD RIGHT	688 m/s / 2,259 fps	-	0.269 s
250 m Path -27.5 cm Elevation 1.10 MRAD UP Wind drift 12.4 cm left Wind correction 0.50 MRAD RIGHT Velocity 662 m/s / 2,172 fps Energy Mass required Flight time 0.344 s Mach 1.95 250 m	-27.5 cm	1.10 MRAD UP	12.4 cm left	0.50 MRAD RIGHT	662 m/s / 2,172 fps	-	0.344 s
300 m Path -47.4 cm Elevation 1.58 MRAD UP Wind drift 18.2 cm left Wind correction 0.61 MRAD RIGHT Velocity 636 m/s / 2,087 fps Energy Mass required Flight time 0.421 s Mach 1.87 300 m	-47.4 cm	1.58 MRAD UP	18.2 cm left	0.61 MRAD RIGHT	636 m/s / 2,087 fps	-	0.421 s
350 m Path -73.2 cm Elevation 2.09 MRAD UP Wind drift 25.3 cm left Wind correction 0.72 MRAD RIGHT Velocity 611 m/s / 2,003 fps Energy Mass required Flight time 0.501 s Mach 1.79 350 m	-73.2 cm	2.09 MRAD UP	25.3 cm left	0.72 MRAD RIGHT	611 m/s / 2,003 fps	-	0.501 s
400 m Path -105.7 cm Elevation 2.64 MRAD UP Wind drift 33.8 cm left Wind correction 0.84 MRAD RIGHT Velocity 586 m/s / 1,922 fps Energy Mass required Flight time 0.584 s Mach 1.72 400 m	-105.7 cm	2.64 MRAD UP	33.8 cm left	0.84 MRAD RIGHT	586 m/s / 1,922 fps	-	0.584 s
450 m Path -145.3 cm Elevation 3.23 MRAD UP Wind drift 43.7 cm left Wind correction 0.97 MRAD RIGHT Velocity 561 m/s / 1,842 fps Energy Mass required Flight time 0.672 s Mach 1.65 450 m	-145.3 cm	3.23 MRAD UP	43.7 cm left	0.97 MRAD RIGHT	561 m/s / 1,842 fps	-	0.672 s
500 m Path -192.7 cm Elevation 3.85 MRAD UP Wind drift 55.1 cm left Wind correction 1.10 MRAD RIGHT Velocity 538 m/s / 1,764 fps Energy Mass required Flight time 0.763 s Mach 1.58 500 m	-192.7 cm	3.85 MRAD UP	55.1 cm left	1.10 MRAD RIGHT	538 m/s / 1,764 fps	-	0.763 s

Calculation model

This is a 3DOF point-mass estimate using G1 or G7 ballistic coefficients, gravity, atmospheric density, sight height, rifle zero geometry, inclination and a horizontal constant wind vector.

G7 is generally a better reference for modern pointed boat-tail rifle bullets.
G1 is commonly used for traditional flat-base projectile shapes.
A G1 BC is not converted into G7, and a G7 BC is not converted into G1.
Bullet mass is not needed for trajectory, but it is required for energy.

Safety notice

Ballistic results are estimates and must be confirmed at the range. Do not rely on a calculated correction without verifying the firearm, ammunition, optic and actual shooting conditions.

The tool does not calculate chamber pressure or recommend powder charges.
It does not determine ammunition compatibility, safe firing direction or backstop.
It does not account for every aerodynamic effect, and real wind may differ substantially along the bullet path.
Users remain responsible for identifying the target and what lies beyond it.