Linear Inches Calculator

Created by Emma Genchin
Reviewed by Dominik Czernia, PhD and Adena Benn
Last updated: Jul 27, 2023

The linear inches calculator serves multiple purposes. A Linear measurement calculator is an indispensable tool for professionals in the construction and manufacturing industries. It is used to express the perimeter of rooms or objects and calculate package sizes for transportation by shipping companies.

However, for the general public, linear inches are most commonly encountered through airline luggage instructions. In such cases, our linear inches calculator helps travelers understand how to calculate linear inches and can be utilized to determine the dimensions of bags or suitcases.

Read on to find out:

  • What linear inches are;
  • How to measure the linear inches of your luggage; and
  • What size luggage is 62 linear inches.

If you're unfamiliar with inches, check the inch to meter calculator, where we explain the conversion between both units.

How to calculate linear inches

Linear inches is the sum of the length, width, and height of the bag, luggage, or object in general. The formula to calculate linear inches is:

linear inches=L+W+H\mathrm{linear \ inches}=L+W+H


  • LL — length;
  • WW — width; and
  • HH — height.

Let's see an example and find out what a measurement of 62 linear inches means. It means that the three dimensions add up to 62 inches. They could be equal to: L=30 inL = 30 \mathrm{\ in}, W=12 inW = 12 \mathrm{\ in}, and H=20 inH = 20 \mathrm{\ in}, and thus L+W+H=62 inL + W + H = 62 \mathrm{\ in}.

How to use the linear inches calculator

To measure the size of luggage using the linear inches calculator, you will need a measuring tape. Follow these steps to understand how to calculate linear inches:

  1. Measure the length of the luggage from one end to the other using inches. Ensure that you measure along the bag's longest dimension. If you use centimeters, you can check out the cm to in converter or use the drop-down list in the linear inches calculator and select the units you prefer.
  2. Measure the width of the luggage from side to side.
  3. Measure the height of the luggage from the bottom to the top.
  4. Put the parameters in the linear inches calculator, and it will add the three measurements together.
  5. The sum of the measurements will give you the size of the luggage in linear inches.

⚠️ It's important to note that this calculation includes external pockets, bag accessories, and, most importantly, the wheels and handles of the bag.

Check out our bag calculator, which may be extremely helpful whenever you want to make your perfect bag by hand.

What does the 62 linear inches limit for luggage mean?

Some airlines impose linear-inch restrictions on all luggage to determine whether checked or carry-on baggage meets their size requirements. The acceptable limit for linear inches can vary depending on the specific airline and class of service.

Typically, the limit range between 45-50 linear inches for carry-on luggage. For checked baggage, the linear inch limit is up to 62 inches for most airline companies. This means that for your luggage: the length × width × height = 62 inches.

❗ It's important to note that these limits can change based on factors such as fare type, frequent flyer status, destination, and date of travel. Additionally, each airline has regulations regarding sports gear, musical instruments, camera equipment, and pets.

To ensure compliance with size restrictions for checked bags and carry-on items, after buying the flight ticket, it is necessary to check the airline's website or contact their customer service for the most up-to-date information. This will help you avoid unnecessary expenses and complications at the airport. It is also essential to be aware of any additional fees that may apply in case your bag exceeds the size limit.

What is the purpose of linear inches in airlines?

Airlines use linear inches because they encounter luggage of various shapes and sizes. The linear inches system allows airlines and travelers to measure different baggage dimensions while considering the maximum acceptable volume.

It provides a precise method of determining the size and enables more luggage to meet the size requirements. By using linear inches, airlines can effectively manage and accommodate a wide range of baggage sizes while ensuring compliance with their size restrictions.

🔎 Are you traveling frequently? Be sure to check the flight radiation calculator to find out your cosmic radiation exposure during flights!


What is a 62 linear inch luggage?

A 62 linear inch luggage has length, width, and height that adds up to 62 inches. This is a commonly used limit for baggage checks on airlines. Note that the dimensions include external accessories and wheels of the luggage.

How do I calculate linear inches?

To find the linear inches of your object:

  1. Prepare a measuring tape or ruler .
  2. Determine the object's longest dimension: length.
  3. Measure its width.
  4. Check its height.
  5. Add up all of the measured dimensions to calculate the linear inches.

What are linear inches?

The linear inches of an object is the sum of three dimensions (length, width, and height) of that object expressed in inches. We usually use it to calculate package sizes for transportation or to determine whether our luggage meets the airline flight requirements.

What are the linear inches of a 30×18×14 luggage?

Luggage with dimensions of 30×18×14 inches has 62 linear inches. To calculate it, add the length, width, and height of the object, expressed in inches:

30 in + 18 in + 14 in = 62 in

This is what a 62 linear inch luggage might be for checked baggage in airlines.

Emma Genchin
Height (depth)
Linear inches
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