What are linear inches?
Linear inches (sometimes called “total dimensions”) are simply the sum of a bag’s length, width, and height. Airlines, shipping carriers, and some sports leagues use this single number as a quick way to cap the overall size of a bag or box without measuring volume.
How this calculator works
The formula is straightforward: Linear Inches = Length + Width + Height, measured in a straight line along each dimension including any wheels, handles, or side pockets that stick out. Pick a common limit from the dropdown (such as 62 inches, the standard for most U.S. domestic checked bags) to instantly see whether your bag fits and by how much you’re over if it doesn’t.
Airline and carrier policies vary and change over time, so always double check the exact limit for your specific airline, fare class, or shipping carrier before you travel or ship — this tool is for general planning only.