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Calcimator

Scope Adjustment Calculator

Calculate MOA or MIL clicks needed to correct point of impact at a given range. Convert between adjustment systems.

About this calculator

Clicks Needed converts a physical miss distance in inches (Impact Offset) into an angular correction, since a scope's turrets adjust angle, not raw distance. The same physical Impact Offset represents a smaller angular error at a longer Range -- an inch of miss at 500 yards is a much smaller angle than the same inch of miss at 100 yards -- so raising Range always lowers the MOA or MIL correction needed and, in turn, Clicks Needed. Click Value works in the opposite direction from the angular size of the correction: a larger Click Value means each individual click moves the point of impact further, so fewer clicks are needed to cover the same angular correction.

MOA Equivalent and MIL Equivalent report the same underlying angular correction in both unit systems regardless of which one you selected, using the standard conversion of roughly 3.438 MOA per milliradian -- and neither of those two outputs depends on Click Value at all, since they describe the angular correction itself rather than how many turret clicks it takes to dial it in. This calculator assumes a linear, single-axis correction and does not account for wind drift, bullet drop compensation, or parallax effects that a full ballistic solution would include.

Inputs

in
yds

Results

Clicks Needed

11

DirectionDown/Left
Total Adjustment2.87
MOA Equivalent2.87 MOA
MIL Equivalent0.83 MIL
Inches per Click at Range0.26 in
How to Use This Calculator
  1. Enter Impact Offset in inches — how far the point of impact sits from the point of aim (positive = high/right).
  2. Enter the Range in yards at which that group was shot.
  3. Select your Adjustment Type — MOA or MIL — to match your scope's turrets.
  4. Enter the Click Value your turrets use (typically 0.25 MOA or 0.1 MIL).
  5. Review Clicks Needed and Direction, and cross-check MOA Equivalent, MIL Equivalent and Inches per Click at Range.

How the result changes with Impact Offset

Impact OffsetClicks Needed
1.56
2.259
4.517
7.529

What each input means

Impact Offset
Distance from point of aim to point of impact. Positive = high/right.
Range
Distance to target when the shot was taken.
Adjustment Type
Scope turret adjustment system.
Click Value
Value per click (MOA: typically 0.25, MIL: typically 0.1).

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Impact Offset = 3, Range = 100, Adjustment Type = 0, Click Value = 0.25 = 4 input(s) provided
  2. Calculate Clicks Needed
    11 = 11
  3. Calculate Direction
    Direction
    Down/Left = Down/Left
  4. Calculate Total Adjustment
    Total Adjustment = Math
    2.87 = 2.87

Engine last updated . Checked against 4 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.

Frequently Asked Questions

Why does the same Impact Offset need fewer clicks at a longer Range?

A scope's turret adjusts an angle, not a fixed distance, and the same physical miss (in inches) corresponds to a smaller angle when it happened farther away. So raising Range while holding Impact Offset fixed lowers the MOA or MIL correction required, which lowers Clicks Needed proportionally.

If I switch my Click Value to a coarser setting, do I need more or fewer clicks?

Fewer -- a larger Click Value means each individual click moves the point of impact further, so it takes fewer of them to cover the same angular correction. Clicks Needed is the total angular adjustment divided by Click Value, so the two move in opposite directions.

Does changing Click Value affect the MOA Equivalent or MIL Equivalent shown?

No -- MOA Equivalent and MIL Equivalent describe the angular size of the correction itself, calculated from Impact Offset, Range, and Adjustment Type alone. Click Value only determines how many individual turret clicks are needed to dial in that same fixed angular correction, so it has no effect on either equivalent figure.

How does the calculator convert between MOA and MIL?

It uses the standard conversion factor of about 3.438 MOA per milliradian (derived from 1 MOA subtending roughly 1.047 inches at 100 yards versus 1 MIL subtending exactly 3.6 inches at 100 yards). Whichever adjustment system you select as your input, both MOA Equivalent and MIL Equivalent are calculated and shown together.

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