U Conversion Calculator

Convert from U's to Inches


Convert from Inches to U's

What is a “U” or “Rack Unit”?

The “U”, or “Rack Unit”, was created by the Electronic Industries Association (EIA). The EIA standard was created for cabinetsracks 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.