1. What is Linear Inches?

Linear inches is a measurement used by airlines to calculate the total size of luggage by adding together the length, width, and height of a bag. Many airlines have restrictions on both weight and linear inches for checked and carry-on luggage.

2. How Does the Calculator Work?

The calculator uses the linear inches formula:

Where:

• \( Length \) — Longest dimension of the item (in inches)
• \( Width \) — Side-to-side measurement (in inches)
• \( Height \) — Top-to-bottom measurement (in inches)

Explanation: The equation simply sums the three main dimensions of an object to determine its total linear size.

3. Importance of Linear Inches Calculation

Details: Knowing your luggage's linear inches helps ensure compliance with airline size restrictions, avoiding unexpected fees or having to check carry-on bags at the gate.

4. Using the Calculator

Tips: Measure your luggage at its widest points, including wheels and handles. Enter each dimension in inches. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the typical linear inches limit for carry-on luggage?
A: Most airlines allow 45 linear inches (22 x 14 x 9 in) for carry-ons, but check with your specific airline.

Q2: How does linear inches differ from actual volume?
A: Linear inches is a simple sum of dimensions, while volume is L×W×H. Two bags with same linear inches can have different volumes.

Q3: Do all airlines use linear inches?
A: Most do, but some have individual dimension limits instead of a total linear inches limit.

Q4: How do I measure irregularly shaped luggage?
A: Measure at the widest points, including any protrusions like wheels or handles.

Q5: What about personal items?
A: Personal items typically have smaller size limits (around 36 linear inches) and must fit under the seat.