When you zero an optic, the manual gives you the adjustment in MOA or MRAD per click. On the target, you measure the miss in inches, usually at 25 yards or less for a pistol and 50 to 100 yards for a rifle. This free Optic Click Calculator converts one to the other. Pick your red dot, prism or LPVO from the list, or type in your own click values, choose a distance, and you’ll see exactly how far one click moves your point of impact.
The list covers popular pistol and rifle optics from Aimpoint, Burris, EOTECH, Holosun, Leupold, Nightforce, Primary Arms, SIG SAUER, Steiner, Swampfox, Trijicon and Vortex. Every value comes from the manufacturer’s product page or manual.
Optic Click Calculator
Inches per click for your red dot, prism or LPVO at any distance, and how many clicks to move your zero.
1Choose your optic
Selecting an optic fills these in. Change any value to use your own.
2Pick your distance
3Inches per click
4Optional: correct your group
Measure from your point of aim to the center of your group, in inches.
Turn direction differs by brand. Check the arrows or markings on your optic’s adjusters (for example “UP” or “R”) to see which way moves the point of impact. Then fire another group to confirm. Don’t chase a single shot.
Inches per click at common distances
| Distance | Windage | Elevation |
|---|
Values from manufacturer published specs; always confirm with live fire. Formula: inches per click = MOA per click × 1.047 × (yards ÷ 100), or MRAD per click × 3.6 × (yards ÷ 100). For printable cards on popular pistol dots, see our Red Dot Quick-Reference Cards.
How to use the optic click calculator
- Make sure the firearm is pointed in a safe direction and you are on a range where live fire is permitted. Fire a confirmation group at a known distance from a stable position.
- Select your optic. The windage and elevation values fill in automatically. If your optic isn't listed, choose "Custom" and enter the values from your manual, in MOA, MRAD or inches at 100 yards.
- Tap the distance you shot at, or type a custom distance in yards or meters.
- Measure how far the center of your group is from your point of aim, both up or down and left or right, and enter it. The calculator tells you how many clicks to move and in which direction.
- Make the adjustment using the direction markings on your optic, then fire another group to confirm.
Frequently asked questions
How is inches per click calculated?
For MOA optics, inches per click = MOA per click × 1.047 × (yards ÷ 100). For MRAD (mil) optics, inches per click = MRAD per click × 3.6 × (yards ÷ 100). One MOA is 1.047 inches at 100 yards, and one MRAD is 3.6 inches at 100 yards. Both scale with distance. To get the number of clicks, divide your miss in inches by the inches per click.
How many clicks is 1 inch at 25 yards?
On a 1 MOA per click optic, one click at 25 yards moves the point of impact about 0.26 inches, so a 1-inch correction is about 3.8 clicks, or 4 when rounded. On a 0.5 MOA optic it is about 7.6 clicks, and on a 1.5 MOA optic about 2.5 clicks.
Is every red dot 1 MOA per click?
No. Most pistol dots are 1 MOA per click, but the Aimpoint ACRO P-2 and C-2 move 0.7 inches at 100 yards per click. The Holosun EPS and EPS Carry are 1.5 MOA. Most rifle red dots and holographic sights are 0.5 MOA, and many LPVOs are 0.25 MOA or 0.1 MRAD. The Aimpoint COA even uses different values for windage (1.0 MOA) and elevation (0.7 MOA).
What is the difference between MOA and MRAD?
Both are angles. One MOA (minute of angle) is about 1.047 inches at 100 yards. One MRAD (milliradian, or mil) is 3.6 inches at 100 yards, or 10 cm at 100 meters. A 0.1 MRAD click is 0.36 inches at 100 yards, a little more than a 0.25 MOA click (0.26 inches).
Which way do I turn the adjuster?
The calculator tells you which way the point of impact needs to move. For example, if your group is low, move the point of impact up. Which way you turn the screw to get there depends on the brand, so follow the arrows or "UP" and "R" markings on your optic and the manufacturer's manual.
Why are my results different from the calculator?
Published click values are nominal, and real-world movement can vary slightly from optic to optic. Small groups and a stable position make the measurement more reliable. Adjust based on the center of a group, not a single shot, and always confirm your zero with live fire.
If you shoot a pistol dot, our Red Dot Quick-Reference Cards put the same numbers on a card you can keep in your range bag. Zeroing, sight picture and target focus are covered hands-on in our Fundamentals of Marksmanship class. If you have a question about your optic or want help getting it zeroed, reach out to us. We're glad to help.