What is the height of 1 rack unit?

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What is the height of 1 rack unit?

In rack mounting, height is measured in rack units, abbreviated as U. One rack unit is defined as 1.75 inches tall (about 44.45 mm). This standard comes from the traditional 19-inch rack system used for servers, switches, and patch panels. So the height of a single rack unit is 1.75 inches. The other numbers don’t match this standard: they would represent different multiples or nonstandard sizes, while 1.75 inches is the recognized height for 1U.

In rack mounting, height is measured in rack units, abbreviated as U. One rack unit is defined as 1.75 inches tall (about 44.45 mm). This standard comes from the traditional 19-inch rack system used for servers, switches, and patch panels. So the height of a single rack unit is 1.75 inches. The other numbers don’t match this standard: they would represent different multiples or nonstandard sizes, while 1.75 inches is the recognized height for 1U.

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