What Are Linear Inches For Luggage When Flying?

What Are Linear Inches For Luggage When Flying

One of the most confusing aspects for travelers is understanding the concept of linear inches for luggage. So, what are linear inches for luggage when flying? 

Understanding linear inches is crucial in order to comply with these guidelines and avoid additional fees or complications at the airport. So, in this article, let’s dive into the world of linear inches and unravel the mystery behind it. 

What Are Linear Inches For Luggage When Flying?

Linear inches (also known as Linear Length) refers to the total length, width, and height of your piece of luggage when added together. For most airlines, the maximum linear dimensions that they allow is 62 inches (158 cm). 

This means that if you add the total length + width + height of your bag, it should not exceed 62 inches.

How To Calculate Linear Inches?

How To Calculate Linear Inches?
Photo by Egor Myznik on Unsplash

In order to calculate the linear inches of your luggage, you will need to measure each side – length, width, and height – of your bag or suitcase. Once you have those measurements, add them together and that is the total linear inches. 

For example, if your carry-on bag measures 22” ( length) + 16” (width) + 9” (height), then your total linear inches would be 47” (22+16+9=47).

What Is 45 Linear Inches?

45 linear inches is equivalent to a 22 x 14 x 9-inch suitcase. It is the most common measurement for carry-on luggage. This size restriction is generally accepted by most airlines and can be useful for travelers who prefer to keep their bags with them at all times.

For those who want to pack more items than the restrictions allow, there are some ways to try and get more into the suitcase. 

For example, packing items flatly into the corners of the suitcase can provide more space for items than stuffing them haphazardly

How To Calculate Linear Dimensions For Your Suitcase?

To calculate linear inches, you have to measure the length, width, and height of the suitcase. The length is the longest side of the suitcase. The width is the shorter side of the suitcase, and the height is the measurement from the bottom to the top of the suitcase. 

Once you have these measurements, add them together to calculate the linear dimensions. 

Here, is a step-by-step guide for you:

Step 1: Measure the Length, Width, and Height of Your Suitcase

Grab your suitcase and a measuring tape. Measure the length, width, and height of your suitcase in either centimeters (cm) or inches (in). Record the measurements so you can refer to them later.

Step 2: Convert Measurements to the Same Unit

If you measured the length, width, and height in different units, you will need to convert them into the same unit. You can use a calculator to do this by multiplying or dividing each measurement by the appropriate conversion factor. 

For example, if you measured the length in inches and width and height in centimeters, you would need to convert all three measurements into either centimeters or inches.

Step 3: Add the Measurements

Once you have all three measurements in the same unit, add them together to get a total length, width, and height.

Step 4: Calculate Linear Dimensions

To calculate your suitcase’s linear dimensions, you will need to multiply the length by the width and then multiply that result by the height. 

For example, if your measurements are 10 cm (length), 20 cm (width ), and 30 cm (height), you would first multiply 10 by 20 to get 200. Then, you would multiply 200 by 30 to get a total linear dimension of 6,000 cm.

Here, is a table with different airlines and size limits of pieces of baggage in linear inches:

Airline Carry-On Limit (Inches) Checked Limit (Inches)
American Airlines 22 x 14 x 9 62 linear inches
Delta Air Lines 22 x 14 x 9 62 linear inches
United Airlines 22 x 14 x 9 62 linear inches
Southwest Airlines 10 x 16 x 24 (approx.) 62 linear inches
JetBlue Airways 22 x 14 x 9 62 linear inches
Spirit Airlines 22 x 18 x 10 62 linear inches
Alaska Airlines 22 x 14 x 9 62 linear inches
Frontier Airlines 24 x 16 x 10 62 linear inches

How To Measure The Width Of A Duffel Bag For An Airline?

How To Measure The Width Of A Duffel Bag For An Airline?
Photo by Jed Owen on Unsplash

Start by laying the bag flat on the ground or on a table. Measure the distance from one side of the bag to the other, across the widest part. Make sure to include any pockets or protruding parts in your measurement.

Here, is a step-by-step guide for you:

STEP 1: Clear the Area

Before you measure the width of a duffel bag for an airline, it is important to clear the area so that nothing interferes with getting an accurate measurement. 

STEP 2: Position the Bag 

Once the area is clear, position the duffel bag on a flat surface. Make sure the bag is not twisted or angled in any way. 

STEP 3: Flatten the Bag

If your duffel bag has any excess material or features such as pockets that add bulk, flatten them out before you measure the bag. This will help to ensure that the measurement is accurate and that your duffel bag fits in the overhead compartment or under the seat of your chosen airline.

STEP 4: Use a Measuring Tape

Once you have positioned and flattened your duffel bag, use a measuring tape to measure its width. Place the start of the tape at one side of the bag and extend it to the other side, making sure the tape is lying flat against the bag.

STEP 5: Extend the Tape

Make sure that you extend the measuring tape as far as possible so that you get an accurate measurement of the width of your duffel bag. This will ensure that there is no guesswork when it comes to packing for your trip.

STEP 6: Read the Measurement

Once you have extended the measuring tape, read the measurement on the tape. This will be the width of your duffel bag and is what you need to know before packing for an airline trip.

STEP 7: Record the Measurement

It’s a good idea to record the measurement of your duffel bag so you can easily refer to it before packing in the future. You can write it down on a piece of paper or keep a record of it in a digital document.

What Are The Airline Luggage Rules?

Generally, airlines have restrictions on the size and weight of both carry-on and checked luggage. However, the rules may vary depending on the ticket or airline. It is important to check with your specific airline for their rules and regulations to avoid any issues or additional fees.

Carry-On Luggage Rules On Size and Weight Limit

The size of your carry-on bag should not exceed 22″x14″x9″, including handles and wheels. Many airlines also have a personal item requirement that allows you to bring a smaller bag such as a laptop, purse, or briefcase in addition to your carry-on bag.

Moreover, most major airlines will allow you to carry up to 40 pounds of luggage in your carry-on bag. However, some airlines may have lower weight limits due to the size or number of bags you are carrying onboard. 

Be sure to check with your airline for their exact policy before packing.

Checked Luggage Rules On Size and Weight Limit

Different airlines may have varying size limits for checked baggage, but generally, it will not exceed 62 linear inches in length, width, and height combined. This is around the size of a standard suitcase that can fit into an overhead bin. 

Airlines may also limit each bag to 45 linear inches (length + width + height). If your luggage exceeds these size limits, it will likely have to be checked as oversized baggage and incur an additional fee.

The weight limit for checked bags is usually between 50 and 70 pounds. If your bag weighs more than that, you may be charged an overweight fee depending on the airline and the route you are traveling. 

It’s important to weigh your luggage at home before going to the airport; this can save you from incurring extra fees.

Oversize and Overweight Fees 

Airlines charge fees for luggage that exceeds the size and weight limits. The amount of these fees will depend on the specific airline and route you are traveling on. It’s important to research the baggage policy before your flight to avoid any unexpected fees.

How To Measure Your Checked Luggage?

To measure your checked luggage, you can use a tape measure or a luggage scale. Measure the length, width, and height of your bag, including any handles or wheels. Add these measurements together to get the total linear inches

Most airlines have specific size and weight restrictions for checked bags, so it is important to check with your airline beforehand to ensure your luggage meets their requirements.

What Is 62 Linear Inches?

62 linear inches is a measurement of luggage size. To calculate it, simply add together the length, width, and height of your bag or suitcase in inches. If your bag measures 24 inches long, 18 inches wide, and 20 inches high, its linear inches would be 24+18+20=62.

Linear inch measurements are used by airlines to determine the size of a bag and whether it can be taken on board as a carry-on. Generally, any bag that is 62 linear inches or less can be taken on board as a carry-on. 

Any bags larger than 62 linear inches must be checked in as luggage. It’s important to note that different airlines have different requirements for carry-on luggage. Hence, make sure to check with your airline before you travel.

Why Do Airlines Limit Luggage To 62 Linear Inches?

Airlines limit luggage to 62 linear inches so that it can fit in the overhead compartments or under the seat in front of the passenger. This helps to maximize the space available and ensure that all passengers can bring their belongings on board without causing any inconvenience or safety hazards.

The detailed reasons for the limitations are given in detail below:

Space Constraints

One of the main reasons why airlines limit luggage size is due to space constraints. Airlines have limited space in their cargo holds, and they need to ensure that every bag fits snugly. This is especially true during busy traveling periods, such as holidays. 

Safety and Balance

Another reason why airlines limit the size of bags is for safety reasons. Larger bags can shift and move during the flight, which can create an imbalance and cause the plane to become unstable. 

This poses a danger to both passengers and crew members onboard.

Loading and Unloading Efficiency

Weight and size restrictions on luggage also help to improve loading and unloading efficiency. Larger bags require more time to lift into the cargo hold, which can lead to delays in take-off or landing. 

Cost Efficiency

Cost Efficiency Is One Reason Airlines Have Size Limit
Photo by Ibrahim Boran on Unsplash

Weight and size restrictions also help to reduce costs for airlines. This is because heavier bags cost more to transport due to fuel consumption. 

What Are The Consequences Of Oversize Bags?

If a bag is deemed oversize, passengers may be required to check it in, resulting in additional fees and inconvenience. Oversize bags can also cause delays during the boarding process as passengers struggle to fit their bags into the limited space available. 

This can lead to frustration and potentially disrupt the entire flight schedule. 

Furthermore, oversize bags may also pose safety risks, as they may not fit securely in the overhead bins or could potentially fall out during turbulence, causing injury to passengers or damage to the aircraft. 

Overall, it is important for passengers to adhere to the specified baggage size limits to avoid these consequences and ensure a smooth and safe travel experience.


How Many Linear Inches Are In A Foot?

A foot is equal to 12 inches. Linear inches refers to the total length or distance measured in inches. To convert from feet to linear inches, you multiply the number of feet by 12. This will give you the equivalent number of linear inches.

What Happens If Your Luggage Is Larger Than 62 Linear Inches?

If your luggage exceeds 62 linear inches, the airline may not accept it for check-in. Most airlines have size restrictions for checked baggage, and if your luggage is too large, you may need to pay an extra fee or make other arrangements for your oversized baggage.

In some cases, the airline may refuse to transport your luggage altogether, and you may be forced to either ship it separately or leave it behind. 

What Is The Standard International Carry-On Size?

The standard international carry-on size varies depending on the airline and the country. However, most airlines have a maximum size limit of around 22 inches in length, 14 inches in width, and 9 inches in height. These dimensions are typically for a rectangular-shaped bag. 

It is important to note that some airlines may have smaller size restrictions. Hence, it is always recommended to check with the airline before traveling. 

Additionally, weight restrictions for carry-on luggage also vary, typically ranging from 15 to 22 pounds.

What Is The Weight Limit For Carry-On Luggage?

Generally, most airlines have a standard weight limit of around 7-10 kilograms (15-22 pounds) for carry-on bags. It is important to check with the specific airline you are flying with to know their exact weight limit as it can vary. 

Exceeding the weight limit may result in additional fees or the need to check the bag in as checked luggage. 


In conclusion, linear inches for luggage when flying represent a standardized measurement that combines the dimensions of length, width, and height. This measurement is crucial for airlines to efficiently manage the storage, loading, and handling of baggage on aircraft. 

Airlines set a limit of 62 linear inches to address practical considerations such as space constraints in cargo holds, balanced weight distribution, loading and unloading efficiency, and the safety and comfort of passengers.

Swati Jaiswal

Swati Jaiswal is a dedicated traveler and an even dedicated individual who specializes in travel, digital marketing, & health and fitness niches. Passport stamps and coffee stains are her badges of honor.

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