## How do you determine rack size?

One “Rack Unit” is equal to 1.75″ in height. To calculate internal useable space of a rack enclosure, simply multiply the total amount of Rack Units by 1.75″. For example, a44U rack enclosure would have 77″ of internal usable space (44 x 1.75).

### What is the standard server rack size?

19 inches
The most common standard server rack width is 19 inches. Most rack-mounted equipment, especially servers, have a mounting width of 19 inches measured from one hole to another. Thus, the rack must be 19 inches across in order to fit this technology. Many racks today come with a exterior width of 24 inches.

#### How many U are in a server rack?

42U
What is a “U” or “Rack Unit”? A rack unit (abbreviated as U, less commonly seen as RU) is a unit of measurement applied to equipment racks and the servers, disk drives and other devices that they contain. One U is 1.75 inches (44.45mm); the standard rack, at 19 inches, is 42U.

What does the U mean in server racks?

server rack unit
A server rack unit, or U, is a unit of measurement used to describe the amount of equipment space a server rack has. A U is 1.75 inches or 44.45mm high. An 8u rack has 8 units of vertical server rack space. Note: Equipment can be more than 1U in size.

What is rack depth?

Mounting depth is defined as the dimension from the front of the front rack angle to the back of the back rack angle. Many racks have adjustable mounting depth so it’s best practice to ensure that the rails being used for all the equipment will fit the depth of the rack. The most common depth is between 28″-29″.

## How wide is 19 rack?

19-inch server racks can vary in qualities. A standard 19-inch server rack cabinet is typically 42u in height, 600 millimetres (24 in) wide, and 36 inches (914.40 mm) deep.

### How many U are in a half rack?

Half Rack – A half rack of colocation servers is equal to roughly 18U – 22U, or slightly over 3 feet of stacked servers. Quarter Rack – A quarter rack colocation, sometimes called a ¼ Rack, refers to a rack which typically holds 10U – 12U, or roughly 1.5 feet of servers.

#### What is 3U?

To be precise, 1U equals 1.75-inches (44.45mm) of rack height. Therefore, a 2U rack mount height would be 2 x 1.75”, which equals 3.5-inches high. A 3U height would be 3 x 1.75” = 5.25-inches.

What size is U in server rack?

One rack unit (1U) is 1.75″ (44.45 mm) of vertical space, or typically the equivalent of three rack hole spaces tall. One of the first criteria to consider when purchasing a rack is how many RUs your equipment requires.

What is a 1U server?

A 1U server is a flat server that takes up one unit of space when mounted in a rackmount or pedestal server chassis. It is shaped like a pizza box and consists of a core processor, storage, memory slots, ports and interfaces.