Dipped-Beam Angle Conversions

Use this chart when converting dip beam headlights to lightboard settings.
   
Percent
%
mm/3m
Degress
(A°)
1.0 30 0.6
1.1 33 0.6
1.2 36 0.7
1.3 39 0.7
1.4 42 0.8
1.5 45 0.9
1.6 48 0.9
1.7 51 1.0
1.8 54 1.0
1.9 57 1.1
2.0 60 1.1
2.1 63 1.2
2.2 66 1.2

     
Percent
%
mm/3m
Degress
(A°)
2.3 69 1.3
2.4 72 1.4
2.5 75 1.4
2.6 78 1.5
2.7 81 1.5
2.8 84 1.6
2.9 87 1.7
3.0 90 1.7
3.1 93 1.8
3.2 96 1.8
3.3 99 1.9
3.4 102 1.9
3.5 105 2.0

LTNZ 2005, VIRM: In-Service Certification, Version 2, Amendment 2. May 2005 , Page 4-1-4

  

Assuming an asymmetric, high intensity cut-off pattern headlight:

Eg 1.  A vehicle with a manufacturers dip beam angle of 1.3%, has a dip beam that will sit 39mm below the horizontal
centre-line of the headlight when measured on a light board set up 3m away from the front of that headlight.  

Eg 2.  A vehicle that doesnt have a manufacturers specification for the dip beam, has a vertical centre height of 765mm. Provided that, at 3m from the front of that headlight, the dip beam falls within a band 30-45mm below the horizontal centre line of that headlight when viewed on the lightboard, it will pass its WOF inspection.