It can also describe a unit that is 1U high and half the depth of a 4-post rack (such as a network switch, router, KVM switch, or server), such that two units can be mounted in 1U of space (one mounted at …

Jun 11, 2025 · In simple terms, a rack unit is a standard measurement used to describe the vertical height of rack-mountable equipment. 1U equals 1.75 inches (or 44.45 mm), making it easy to size …

Apr 24, 2017 · What does 1U mean? A “U” or rack unit is a measurement of the height of a piece of computer or network gear that is designed to fit into a standard 19″ or 23″ rack.

Nov 13, 2018 · The 1U, 2U, 3U, 4U, 5U, 6U and 7U are all different sized rackmount servers, and the "U" following the number is short for unit. The number indicates the size of the rackmount, 1U being …

Apr 11, 2025 · What Is a Rack Unit? A rack unit, abbreviated as U (or RU), is a standardized unit of measurement used to describe the vertical space occupied by equipment in a server rack. 1 Rack …

A 1U server is one of the most common configurations in data centers. Occupying only 1.75 inches of vertical space, 1U servers are designed for environments where space is at a premium.

Oct 17, 2025 · One U = 1.75 in (44.45 mm). This article explains definition, planning, installation tips, and trends. Rack Units, or “U,” are the standard way to measure how much space a device takes up …

Apr 3, 2013 · For electronic equipment racks (e.g., 19 or 23 inches wide), the term 1U is used to define one rack unit of height. 3U height would be 3 x 1.75” = 5.25-inches. It should be noted that the 1U, …

May 22, 2020 · We manufacture server racks anywhere from 1U to 70U (sometimes even 90u). When narrowing down your server racks, don’t forget to make sure that the external height will work for …

Nov 21, 2025 · The main difference between 1U, 2U, and 4U servers lies in their height and the amount of space they occupy in a rack. 1U servers are the most compact, taking up the least amount of …