Server Rack Guides: Sizing, Cooling, Cabling and Setup Articles

2-Post Rack Dimensions Explained

Standard 2-post rack dimensions: 19 in nominal width, about 20.25 in overall, 18U to 58U tall, 3 or 6 in uprights on a 15 in base, and about 20 in of gear depth.

What Size Server Rack Do You Need?

Work out what size server rack to get: depth first, then U count plus growth, then width. A step-by-step method for home labs, closets and small offices.

Server Rack vs Cabinet: What's the Difference?

A server rack is the open mounting frame; a cabinet is that frame inside an enclosure. How to choose, size and avoid the depth mistake behind returns.

10-Inch Rack Width Explained

A 10-inch rack is 10 in (254 mm) across the ears, 9.31 in (236.5 mm) between hole centers and 8.75 in (222 mm) between the rails. Here is what each number decides.

4-Post Rack Dimensions Explained

A 4-post rack is 19 in wide at the mounting interface but about 20.25 to 23.25 in overall. Heights, depths, footprints and fit checks, in plain numbers.

Frequently asked questions

Which article should you read first if you are new to server racks?

Start with the article explaining what is inside a server rack, then read the one on rack units. Together they give you the vocabulary needed to follow the sizing and comparison articles.

Do these articles recommend specific racks to buy?

No. This index lists practical articles on sizing, setup, cooling and comparing designs. Our ranking pages are where specific products are compared.