Know your group.
Down to the click.

Photograph your target, draw a reference line, mark your shots — MOACalc calculates group size in MOA, offsets from your aiming point, and the exact scope corrections needed to zero in.

Download on the App Store How it works

MOACalc session setup screen — Set up firearm, ammo, and conditions

MOACalc target canvas with shot marks — Mark shots on your target photo

MOACalc results with annotated image — Get group size and scope corrections

MOACalc saved target history — Save and review every session

Why MOACalc

True MOA & Mil calculations

Uses the true 1.0472″/100yd MOA value and 3.6″/100yd Mil value — not rounded approximations — for the most accurate group analysis possible.

Photo-based — works anywhere

Photograph a target in the field or import one from your library. No special paper or QR codes required.

Scale from any reference

Draw a line across any known dimension — a 1″ grid square, a bull diameter, printed marks — and MOACalc sets the scale automatically.

Exact scope correction clicks

Enter your scope's click value (¼ MOA, 0.1 Mil, or any value) and get the exact number of clicks needed in each direction.

Caliber-sized shot circles

Each shot is marked with a circle sized to your actual bullet diameter, giving you a realistic picture of how holes overlap on the target.

Session history with annotated images

Save every session with a fully annotated image — shooter, firearm, ammo, conditions, group results, and corrections all printed on the photo.

Firearm & ammo profiles

Save your rifles, handguns, and ammunition so caliber and diameter fill in automatically each session — no re-entry needed.

Live weather conditions

Pull temperature, humidity, wind speed, and elevation automatically from your GPS location to document real-world shooting conditions.

Built For

Precision rifle shooters · long-range competitors · hunters zeroing a new optic · handgun accuracy work · anyone who wants to know exactly how their group performed and what adjustment to make next.

What MOACalc Measures

Extreme Spread — maximum center-to-center distance between any two shots, in inches and MOA
Group Centroid — the average center of all shots
Horizontal & Vertical Offset — centroid distance from your aiming point, in inches, MOA, and Mil
Scope Corrections — windage and elevation clicks needed to move the group onto the aiming point

Get MOACalc

Photograph. Mark. Calculate. Know exactly where you're shooting.

Download on the App Store

Know your group.Down to the click.