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Wndsn Height Calculator

High-precision height calculator. Companion to Wndsn Telemeters: Low tech, high utility graphical distance & altitude computers from the Wndsn applied science lab.

By way of using a Wndsn Quadrant or Telemeter measuring degrees or a hairline graticule measuring mil or moa or any other instrument or technique that returns the angular size of a known object, we can determine the height of that object.

Calculate range.

The angular relationship between height and distance.


Determine height s (use any unit (cm, mm, inches, etc.) for d, at angular size α)


[Load sample values (JSON) (XML) (CSV).]

Compare MIL vs. MRAD vs. NATO-MIL.


1        rad =  57.3     deg
6.2832   rad = 360       deg = 6283.2   mil = 21,600     minutes (moa)
0.017453 rad =   1       deg =   17.453 mil =     60     minutes (moa)
                 0.0573  deg =    1     mil =      3.438 minutes (moa)
                 0.05625 deg =    1 natomil

Radian, degrees, mrad, NATO-MIL, and MOA.

See also