Country Trailhead

Field Guide / Optics

MOA and MIL

Also called: minute of angle, milliradian, mrad, turret clicks

Two angular units used on scope turrets and reticles. One MOA is about 1 inch at 100 yards, and one MIL is about 3.6 inches at 100 yards.

Simplified labeled diagram: MOA and MIL
Simplified diagram, not to scale. Real products vary by maker, and the drawing does not show any one model.
Type
Specs & Terms
1 MOA
About 1.047 inches at 100 yards
1 MIL (mrad)
About 3.6 inches at 100 yards, or 10 cm at 100 meters
Common clicks
1/4 MOA, 1/2 MOA, or 0.1 MIL per click
Used for
Hunting, Target shooting

What it is good for

  • Understanding scope adjustments.
  • Making holdovers and corrections.
  • Keeping reticle and turrets in the same unit.

Where it falls short

  • Pick a scope whose turrets and reticle use the same unit.
  • Clicks are only as accurate as the scope's tracking.
  • Hunters rarely need either beyond basic zeroing.

Tips

  • After you zero, record your turret setting.

Works well with

Field notes

Angles grow with distance. A 1 MOA error is about 1 inch at 100 yards and about 3 inches at 300 yards.

Related guides

Specs here are typical, not guarantees; models differ, so check the maker's published numbers. Never look at the Sun through any optic without a certified solar filter, and zero or mount a scope with the firearm unloaded and pointed in a safe direction. Rules on optics, such as scopes on certain hunts or lasers and electronics, differ by state; our state resources directory links to each state's official regulations. Want a buying guide? Read Choosing Hunting Optics.

← All optics