Linear Inches Calculator
Calculate the linear inches of a package (Length + Width + Height), a common measurement used by airlines for luggage size restrictions.
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The Traveler's Guide to Linear Inches
What is a Linear Inches Calculator?
A Linear Inches Calculator is a simple tool used to determine the total size of a three-dimensional object by adding its three dimensions: length, width, and height. This measurement is most commonly used by airlines to define size restrictions for carry-on and checked baggage. Instead of enforcing strict individual limits for length, width, and height, many airlines use a single "linear inches" or "linear centimeters" total. This gives passengers more flexibility with the shape of their luggage, as long as the total combined dimensions do not exceed the airline's limit.
How to Use the Linear Inches Calculator
Calculating the linear inches of your bag is a quick and easy process. You'll just need a tape measure.
- Measure the Length: Lay your bag flat and measure its longest side. Enter this value in the "Length" field.
- Measure the Width: Measure the shorter side of the bag. Enter this value in the "Width" field.
- Measure the Height (or Depth): Measure the thickness of the bag. Enter this value in the "Height" field.
- View the Result: The calculator automatically adds the three measurements together and displays the total linear inches.
The Formula for Linear Inches
The calculation is one of the simplest in the world of measurements. It's a basic sum of the three spatial dimensions.
Total Linear Inches = Length (in) + Width (in) + Height (in)It's important to use the same unit for all three measurements. While the term is "linear inches," the same principle applies to "linear centimeters" if you are using the metric system.
Practical Example
Let's find the linear inches for a standard carry-on suitcase.
- Scenario: You are preparing for a flight and want to ensure your carry-on bag meets the airline's size requirement, which is typically around 45 linear inches.
- Measurements:
- Length: 22 inches
- Width: 14 inches
- Height: 9 inches
Calculation:
You would input these three values into the calculator.
22 (Length) + 14 (Width) + 9 (Height) = 45 Linear Inches
The result is 45 linear inches. This means your bag meets the common size limit for a carry-on suitcase for many major airlines.
Frequently Asked Questions (FAQ)
- Should I include wheels and handles in my measurements?
- Yes, absolutely. Airlines require that the total external dimensions, including any wheels, handles, and pockets, are included in the measurement. Always measure from the most extreme points of the luggage.
- What is a common linear inch limit for airlines?
- While it varies, a common limit for carry-on luggage is 45 linear inches (e.g., 22 + 14 + 9 inches). For checked baggage, the limit is often around 62 linear inches. However, you must always check with your specific airline before you fly, as these rules can change.
- Is this the same as volume?
- No. Linear inches is a one-dimensional measurement obtained by adding the dimensions. Volume is a three-dimensional measurement calculated by multiplying them (Length × Width × Height) and is expressed in cubic units (like cubic inches).
Related Tools and External Resources
For other travel and measurement calculations, these tools might be helpful:
- Length Converter: Convert between inches, centimeters, and other units.
- Weight Converter: Convert your luggage weight between pounds and kilograms.
- Time Difference Calculator: Plan for jet lag by checking time zones.
- TSA Carry-On Luggage Tips: Official guidance on what you can bring on a plane in the United States.
- IATA Baggage Information: Guidelines from the International Air Transport Association.
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