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U Conversion Calculator

What is a "U" or "Rack Unit"?

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The "U", or "Rack Unit", was created by the Electronic Industries Association (EIA). The EIA standard was created for cabinets, racks and panels, as well as other associated equipment. It sets a standard for system spacing, mounting, bezel clearance, as well as placement of the mounting holes in the mounting flange.

Please use the Calculator below to convert between "U's" and inches.

U CONVERSION CALCULATOR

Select the "U" value from the list that you want to convert
- or -
Select the Inches value from the list that you want to convert


Click Here for a PDF U Conversion Chart.
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