1. What Are Linear Inches?

Linear inches is a measurement used by airlines to determine if your luggage meets size requirements. It's calculated by adding together the length, width, and height of your bag. Most airlines have a maximum linear inches allowance for checked and carry-on luggage.

2. How To Calculate Linear Inches

The formula for linear inches is simple:

Where:

• Length — The longest side of your luggage (inches)
• Width — The side perpendicular to length (inches)
• Height — The vertical measurement (inches)

Example: A suitcase measuring 28" (L) × 19" (W) × 12" (H) would be 28 + 19 + 12 = 59 linear inches.

3. Why Linear Inches Matter

Details: Airlines use linear inches to standardize luggage size restrictions. Exceeding limits may result in additional fees or being forced to check carry-on bags. Typical limits are 45 linear inches for carry-ons and 62 linear inches for checked bags.

4. Using This Calculator

Tips: Measure your luggage at its widest points, including wheels and handles. Enter dimensions in inches (1 inch = 2.54 cm). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Do wheels and handles count in measurements?
A: Yes, include all protruding parts in your measurements as airlines measure the entire bag.

Q2: What's the typical linear inches limit for carry-ons?
A: Most airlines allow 45 linear inches (22 × 14 × 9 inches) for carry-ons, but check with your specific airline.

Q3: How strict are airlines about linear inches?
A: Enforcement varies - some use size bins, others measure only if the bag looks oversized. Budget airlines tend to be stricter.

Q4: Does weight affect linear inches?
A: No, linear inches only measures size. Weight limits are separate restrictions.

Q5: Can I use this for international flights?
A: Yes, but convert centimeters to inches first if needed (1 inch = 2.54 cm). Some international airlines use centimeter limits.