Rack unit - Wikipedia
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 …
Rack Unit (U): Size, Height & Standard Rack Mount Dimensions ...
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 …
What does 1U, 2U, 3U Mean? Rack Units Explained - The Geek Pub
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.
1U vs. 2U vs. 3U: Rack Units Explained | EDN
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, …
Understanding 1U, 2U, ... 18U, 42U: What They Mean in Network ...
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.
What's the difference between 1U, 2U, 3U and 4U rackmount ...
Sep 15, 2021 · Devices designed to fit into rackmount server cabinets come in a range of heights, from 1U to 4U. A 1U panel is 1 Rack Unit tall, a 2U is 2 Rack Units tall and so on.
Understanding Rack Units (U) in Server Racks[December 2025]
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 …