Device preferences and calculators

Settings & Tools

Choose each measurement unit separately, save it on this device and use the same preference across the website.

Preferred units

Set every measurement independently

Saved on this device

Presets change the draft choices below. Scope mechanics stay separate and nothing is saved until you press Save preferences.

01Ballistic inputs

Each choice controls only its matching field. BC keeps its existing G1, G7 or GA model and is never converted.

Muzzle and measured velocitySight height over boreZero, range and result distanceBullet or pellet weightProjectile diameter and length

02Atmosphere and conditions

Weather imports are converted into these units and remain editable.

TemperatureStation pressureAltitudeWind speed

03Labels, printing and results

Physical label calculations remain exact in millimetres internally.

Turret and label dimensionsPaper thicknessTrajectory dropProjectile energy

04New scope defaults

These values prefill new blank calculator and label work. Existing and saved projects keep their own mechanical settings.

Scope adjustment unitOne click equalsClicks in one full revolution

Saved preferences are active

Only unit choices and new-work scope defaults are stored. Measurements, projects and calculator results are not stored here.

01 · Independent converter

Unit Conversion

Convert one value without changing settings

Nothing is saved

Value typeValueFromToConverted value1.5 in

Independent quick calculators

Enter every value here

These calculators use only the fields inside each form.

Nothing is read or saved

Results stay inside these forms. They do not fill, replace or correct any value elsewhere on the website.

Central tools

Open the existing calculators from one place

Shared calculation logic

BC Startup Estimator

Estimate a cautious starting G1, G7 or GA BC from projectile details or measured velocity loss.

Open BC estimator

Trajectory Correction

Calculate a trajectory first, then correct either BC or muzzle velocity from one verified distance.

Open correction workspace

Paper Thickness Estimator

Estimate a practical label-fit starting point from finished paper thickness and turret circumference.

Open thickness estimator

Manual Velocity Trajectory

Paste a complete FX trajectory to preserve its 0.1 MRAD clicks or convert it to another scope, with a speed-only fallback.

Open manual trajectory

The two quick calculators above use only their own manual entries. The full BC estimator and Trajectory Correction remain available inside the Ballistic Calculator.