Milliradian Distance Calculator

Estimate distance using angular measurement in milliradians. Enter target size and MIL reading to calculate distance instantly.

Optical Range Calculator:

Uses the MIL ranging formula for accurate distance estimation. Widely used in long-range shooting, surveying, and field measurements.

MIL Distance Calculator

Target Size:

Known height or width of the target

MIL Reading:

Angular measurement from reticle

Common MIL Values:

Common Target Sizes:

Show Calculation Formula

Calculation Results

Enter target size and MIL reading

then click "Calculate" for distance

Milliradian Distance: How It Works

A milliradian isn't some exotic measurement cooked up for military applications. It's simply one-thousandth of a radian—the natural way to measure angles. What makes it practical for distance estimation is the math that falls out of it: at one milliradian, an object appears to span one unit of size for every thousand units of distance.

The Formulas

Distance from MIL

Distance = (Target Size ÷ MIL) × 1000

The 1000 multiplier converts the milliradian relationship directly to distance units.

Reverse: Finding MIL

MIL = (Target Size × 1000) ÷ Distance

Useful when you know both distance and size, and need the angular measurement.

Example Calculations

Target Size	MIL Reading	Distance
1 meter	1 MIL	1000 m
0.5 meter	2 MIL	250 m
2 meters	4 MIL	500 m
1.8 meters (human)	3 MIL	600 m
36 inches	1.5 MIL	609.6 m