Enter the total number of rack units into the calculator to determine the rack unit height.

Rack Unit Height Calculator

Convert RU ↔ Height
Rack Space Planner
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Front Panel (EIA-310)

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Summary
RU:–
Height (in):–
Height (ft):–
Height (cm):–
Height (mm):–

Rack Unit Height Formula

The following formula is used to calculate rack height from a given number of rack units (U). 

h = 1.75 \times n
  • Where h is the rack height (inches)
  • n is the total number of rack units (U)

To calculate the rack height in inches, multiply the number of rack units by 1.75 (since 1U = 1.75 inches).

What is a rack unit?

Definition:

A rack unit (U) is a standardized unit of measure equal to 1.75 inches (1 3/4 inches), or 44.45 mm. It's commonly used to describe equipment and rack frame heights (for example, 1U, 2U, 3U, etc.).

How to calculate rack unit height?

Example Problem:

The following example outlines how to calculate a rack height from rack units.

First, determine the total number of rack units. In this case, the equipment is 3U tall, so the number of units is 3.

Next, the last and final step is to calculate the rack height using the formula above:

h = 1.75 × n

h = 1.75 × 3

h = 5.25 inches