EuroRack dimensions         

Rolf Meurer 2000 
VP (Vertical Pitch)
1VP = 0.05 inch (1,27mm)
 
U (Units) HE (Höhen-Einheiten)
1U =   35 VP =   44,45mm  
3U = 105 VP = 133,35mm 1 section rack
5U = 175 VP = 222,25mm FORMANT module height
6U = 210 VP = 266,70mm 2 section rack

HP (Horizontal Pitch)
1HP = 0.2 inch (5,08mm)
TE (Teil-Einheiten)
Module height
nominal = 129,54mm
usual = 128,50mm
 
Screw distance
vertical = 122,50mm
horizontal = (HP-3) * 5,08mm
 
Module mounting holes Module width
[HP]
nominal width
(multiple of 5.08 mm)
actual width
[mm]
EuroRack Module Mounting Holes 1 5,08 5,0
2 10,16 9,8
4 20,32 20,0
6 30,48 30,0
8 40,64 40,3
10 50,80 50,5
12 60,96 60,6
14 71,12 70,8
16 81,28 80,9
18 91,44 91,3
20 101,60 101,3
21 106,68 106,3
22 111,76 111,4
24 121,92 121,6
28 142,24 141,9

Rack specification

The horizontal front panel size is exactly 19-inch (482,6 mm)
Horizontal Rack hole pairs have a centre-to-centre pitch of 18.3 inch (465 mm).
The holes in the vertival rails are arranged in repeating sets of three,
with centre-to-centre separations of:
0.5 inch (12,7 mm),
0.625 inch (15,875 mm),
0.625 inch (15,875 mm).
The hole pattern thus repeats every UNIT (HE) of 1.75 inches (44,45 mm).
       
Rack mounting holes Units (Panel height) inches mm
19" Rack Dimensions 1 1.719 43,7
2 3.469 88,1
3 5.219 132,6
4 6.969 177,0
5 8.719 221,4
6 10.469 265,9
7 12.219 310,3
8 13.969 354,8
9 15.719 399,3
10 17.469 443,7