What is the difference between MOA and MIL?

MOA (minute of angle) is 1/60th of a degree and subtends about 1.047 inches at 100 yards. MIL (milliradian) is 1/1000th of a radian and subtends 3.6 inches at 100 yards (or exactly 100 mm at 100 m). Both are angular, so the inches they cover grow with distance.

What is true MOA versus shooter's MOA?

True MOA subtends 1.047 inches per 100 yards by exact geometry. Shooter's MOA rounds this to 1.000 inch per 100 yards for easy mental math. The difference is about 4.7 percent and grows at long range, so pick the one your turret is actually calibrated to.

How are clicks calculated?

First the inches-per-unit at your distance is found by scaling the 100-yard value. The required angular correction equals your impact error divided by that figure. Dividing by your click value and rounding gives the number of clicks to dial.

Which way do I turn the turret?

If your shot landed low, dial UP; if high, dial DOWN; if left, dial RIGHT; if right, dial LEFT — you move the reticle toward the impact. The calculator tells you the direction based on what you select.

Why round to the nearest click?

Scope turrets move in fixed detents and cannot dial a fraction of a click. The tool rounds the ideal correction to the closest achievable click, which is normally well within the precision needed at practical ranges.

MOA / MIL Scope Adjustment Calculator

The MOA / MIL scope adjustment calculator turns a missed group into a precise turret correction. Tell it how far your shots landed from point of aim, at what distance, and what your scope clicks in, and it returns the exact number of clicks to dial and the direction to turn.

How it works

Scope adjustments are angular, so a single click covers more inches the farther the target is. The two common units are:

MOA — 1 minute of angle subtends 1.047" at 100 yards (true) or 1.000" if your turret uses rounded shooter’s MOA.
MIL — 1 milliradian subtends 3.6" at 100 yards.

To find the correction, the tool scales the 100-yard value to your distance, divides your impact error by it to get the angular correction, then divides by your click value:

inches_per_unit = base_at_100yd × (distance_yd / 100)
angle           = error_inches / inches_per_unit
clicks          = round(angle / click_value)

Example and notes

Suppose your group lands 3 inches low at 200 yards on a 1/4 MOA scope. One true MOA at 200 yards is 1.047 × 2 = 2.09", so the correction is 3 / 2.09 = 1.43 MOA, which is 1.43 / 0.25 ≈ 6 clicks UP. Always confirm the unit and click value stamped on your turret caps — mixing MOA math with a MIL turret is the most common sight-in mistake. Move the reticle toward the impact: low means up, left means right, and so on.