Tools › Scope Adjustment
Scope Adjustment Calculator
Zero your scope, deliberately move where the bullet lands, or convert between MOA, Mils, and inches. The Visualize tab shows where shots land on a target as you click.
What These Words Mean
- MOA (minute of angle)
- An angle. 1 MOA opens up about 1 inch of width for every 100 yards. So at 200 yards, 1 MOA is about 2 inches. At 300, about 3.
- Mil (milliradian)
- Another angle, used by most modern scopes. 1 Mil is about 3.6 inches at 100 yards. Mils are bigger than MOA, so the numbers are smaller.
- Click value
- How much your scope's turret moves the crosshair with each click. Look at the turret cap on your scope. It says something like “1 click = 1/4 MOA” or “0.1 Mil per click.”
- Windage
- Left and right adjustment.
- Elevation
- Up and down adjustment.
- Point of impact (POI)
- Where the bullet actually hits.
Setup
Set how far your target is and what your scope clicks in. Every tab below uses these two numbers.
Zero My Scope
You aimed dead center, fired a group, and your shots landed off to the side. Measure how far the center of your group is from where you aimed. This tab tells you which way to turn the turret and how many clicks to bring future shots into the bullseye.
Move Point Of Impact
You're zeroed and you want to deliberately shift where the bullet lands. Common case: you switched from a 100-yard zero to wanting a 200-yard zero, or you're holding off for wind on a long shot. Tell us how far you want to shift and which way.
Visualize Your Adjustment
Tap the arrow buttons to dial the turrets. The orange dot shows where your bullet will hit on the target as you click. Distance and click value come from Setup at the top.
Convert Between MOA, Mils, and Inches
Enter any one box. The other two fill in. Useful for reading load data that's listed in the unit your scope doesn't use.
The Math Behind It
1 MOA spans about 1.047 inches at 100 yards. 1 Mil spans 3.6 inches at 100 yards (and exactly 10 cm at 100 m). 1 Mil equals 3.4377 MOA. Inches at any distance equals angle times distance over 100, with the right scaling per unit.
For meters, 1 MOA is about 2.908 cm at 100 m. We convert to inches in the output for parity with the MOA-at-yards convention. Set the distance unit in Setup to switch.
Disclaimer. Educational. Not load data. Always verify against a current published reloading manual.