Data Center Rack Units Chart

Below is a chart to figure out how many inches is 1U in a Rack.  This comes in handy when you need to measure out cable lengths.

1U = 1.75″

 

Rack Units
Height (in)
Height (ft)
Height (cm)
1U
1.75″
0.15′
4.4 cm
2U
3.5″
0.29′
8.9 cm
3U
5.25″
0.44′
13.3 cm
4U
7″
0.58′
17.8 cm
5U
8.75″
0.73′
22.2 cm
6U
10.5″
0.88′
26.7 cm
7U
12.25″
1.02′
31.1 cm
8U
14″
1.17′
35.6 cm
9U
15.75″
1.31′
40 cm
10U
17.5″
1.46′
44.5 cm
11U
19.25″
1.6′
48.9 cm
12U
21″
1.75′
53.3 cm
13U
22.75″
1.9′
57.8 cm
14U
24.5″
2.04′
62.2 cm
15U
26.25″
2.19′
66.7 cm
16U
28″
2.33′
71.1 cm
17U
29.75″
2.48′
75.6 cm
18U
31.5″
2.63′
80 cm
19U
33.25″
2.77′
84.5 cm
20U
35″
2.92′
88.9 cm
21U
36.75″
3.06′
93.3 cm
22U
38.5″
3.21′
97.8 cm
23U
40.25″
3.35′
102.2 cm
24U
42″
3.5′
106.7 cm
25U
43.75″
3.65′
111.1 cm
26U
45.5″
3.79′
115.6 cm
27U
47.25″
3.94′
120 cm
28U
49″
4.08′
124.5 cm
29U
50.75″
4.23′
128.9 cm
30U
52.5″
4.38′
133.4 cm
31U
54.25″
4.52′
137.8 cm
32U
56″
4.67′
142.2 cm
33U
57.75″
4.81′
146.7 cm
34U
59.5″
4.96′
151.1 cm
35U
61.25″
5.1′
155.6 cm
36U
63″
5.25′
160 cm
37U
64.75″
5.4′
164.5 cm
38U
66.5″
5.54′
168.9 cm
39U
68.25″
5.69′
173.4 cm
40U
70″
5.83′
177.8 cm
41U
71.75″
5.98′
182.2 cm
42U
73.5″
6.13′
186.7 cm
43U
75.25″
6.27′
191.1 cm
44U
77″
6.42′
195.6 cm
45U
78.75″
6.56′
200 cm
46U
80.5″
6.71′
204.5 cm
47U
82.25″
6.85′
208.9 cm
48U
84″
7′
213.4 cm
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