Why convert luggage size from inches to cm?

Many airline rules are published in inches, while luggage labels are often in centimeters.

Luggage Size Inch to CM Converter Table

Use this chart as a quick reference when airline rules are listed in inches but your suitcase labels are in centimeters.

Inches	Centimeters	Usage Context
22 x 14 x 9	56 x 36 x 23	Common carry-on baseline
21.5 x 13.5 x 9	55 x 34 x 23	Compact carry-on
24 x 16 x 10	61 x 41 x 25	Large cabin class (airline dependent)
62 linear in	158 linear cm	Common checked threshold

Reference Sources