Linear Inches Calculator
Find linear inches (L+W+H) for airline baggage.
Many airlines restrict checked bags by total linear inches.
How the Math Works
Linear inches is a simple measurement calculation used primarily for airline baggage allowances. The formula adds together the length, width, and height of an item measured in inches: Linear Inches = L + W + H. For example, a suitcase that measures 28 inches in length, 18 inches in width, and 12 inches in height would have a linear inch measurement of 58 inches (28 + 18 + 12). This straightforward arithmetic provides a quick way to determine if your luggage meets airline size restrictions.
Practical Applications
To use this calculator, simply measure your bag's three dimensions in inches and add them together. Most travelers should check their specific airline's baggage policy before traveling, as size limits vary. For instance, if an airline allows bags up to 62 linear inches, you can test different packing configurations to see if your items will fit within the limit. Measure each side at the longest points, including wheels and handles, and remember that irregularly shaped items may require custom sizing or special baggage options.
Day-to-Day Use
Knowing your bag's linear inches helps you avoid costly baggage fees and last-minute packing stress when flying. Beyond travel, this calculation is useful for shipping packages, checking if items will fit in specific storage spaces, or determining whether large purchases will fit in your vehicle. Understanding linear measurements also helps when shopping for luggage online, comparing furniture sizes, or planning storage solutions at home. This simple math skill saves time and money in many everyday scenarios involving size and space constraints.
Worked example
22+14+9 → 45 linear in.
FAQ
Airline limits?
Often 62 linear inches for checked bags; 45 for carry-ons.