Target photo
Return to the marked target instead of keeping a detached number.
Free target photo calculator
Upload your target. Mark the shots. Calculate MOA.
Use the same target-measurement workflow available inside ArsenalHQ Range Days. No account is required, and this public calculator does not save or upload your target.
Target analysis
MOA target calculator
UPLOAD A TARGET PHOTO TO BEGIN
Mode: Plotting shotsShots: 0Group: —MOA: —
Shots marked
0
Group size
—
Calculated result
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- 1
Choose a target photo
Upload an existing image or open the camera on a mobile device.
- 2
Set the 1-inch reference
Select reference mode, then mark the ends of a known one-inch distance.
- 3
Plot each shot center
Switch to shot mode and mark the holes. The group and MOA update automatically.
Keep the complete record
A target means more when you can find it again.
Create an ArsenalHQ account to save the target with the Range Day, firearm, and ammunition that produced it. Pull weather automatically for the session, add chronograph results, and keep the complete record together.
Create a free accountFree during launch. No credit card required.
Automatic weather
Enter the date, time, and location to pull the range conditions, or record them manually.
Velocity data
Import Garmin ShotView, LabRadar, or generic CSV data, or enter individual velocities manually. ArsenalHQ calculates average velocity, SD, and ES.
Firearm profile
Connect the result to the firearm and update its round count.
Ammunition used
Attach a factory-ammunition lot or handload recipe and batch.
Connected history
Review distance, targets, weather, notes, and performance together across Range Days.
The calculation
How the target calculator measures MOA
The one-inch reference converts pixels in the photo into a physical measurement. ArsenalHQ finds the greatest center-to-center distance between the marked shots, converts that spread to inches, and adjusts it for the entered distance.
MOA = group size ÷ (1.047 × distance ÷ 100)
For the best result, use a clear photo taken as square to the target as practical and mark the reference and shot centers carefully.
Measure consistently
What the calculator is doing
Photo scale
The two blue reference points define one inch in the target image.
Extreme spread
The widest pair of marked shot centers defines the group size.
Angular conversion
The group size is normalized for distance using true 1.047-inch MOA.
Sample context
The number of marked shots remains visible because sample size matters when comparing groups.
Common questions
MOA calculator FAQ
What is MOA?
MOA means minute of angle. It is an angular measurement that lets shooters compare group sizes recorded at different distances. One MOA spans about 1.047 inches at 100 yards.
How do I calculate MOA from group size?
Divide the group size in inches by 1.047 multiplied by the distance in yards divided by 100. This calculator performs that calculation for you.
Should I measure a group center-to-center?
Yes. Measure between the centers of the two most widely separated shots. A common method is to measure the outside spread and subtract one bullet diameter.
Is one inch at 100 yards exactly one MOA?
No. One true MOA spans approximately 1.047 inches at 100 yards. Using one inch is a convenient field approximation.
Does the number of shots change the MOA formula?
No. Shot count does not change the formula, but it adds useful context. A three-shot group and a ten-shot group with the same MOA do not describe the same sample.