How many centimeters is 1U of cabinet? Understand the standard dimensions of cabinets

A rack is a structure used to house and organize computing equipment. In the computer room, the common cabinet size is marked as "U", which represents a unit height (Unit Height). Each "U" represents a standard 19-inch (48.26 cm) width and 1.75-inch (4.45 cm) height space. 

What is 1U?

1U refers to a standard rack unit with a height of 1.75 inches or 44.45 mm. This size is widely used in servers and network equipment. Under normal circumstances, a typical server will occupy at least 1 to 2 "U" of space.

What is 2U?

2U represents two standard rack units with a height of 2 x 1.75 = 3.5 inches or 88.9 mm. Compared with the smaller 1 U size, it provides larger capacity and stronger scalability, and can accommodate more hardware devices.

What is 3u?

Similarly, the height of three consecutive standard rack units is 3 x 1.75 = 5.25 inches or 133.35 mm. Cabinets of this size are typically used for equipment requiring more expandability and functionality.

What is 4U?

4U represents four standard rack units with a height of 4 x 1.75 = 7 inches or 177.8 mm. Compared with its smaller size, it provides larger capacity and more powerful processing capabilities, making it suitable for installing large servers, network switches and other equipment.

Summarize:

When selecting a cabinet, it is important to understand the amount of space corresponding to different "U" sizes. Determining the number of "U" required based on actual needs can avoid purchasing a cabinet that is too large or too small and ensure that the equipment has enough space for cooling and management.