Carry-On Size Calculator: Check Bag Dimensions and Weight

Check if your bag fits airline carry-on limits. Enter length, width, height and weight, see total linear size, excess and volumetric weight.

Quick 1-Click Common Luggage Presets

Luggage Measurements & Target Airline

Include wheels, handles, and bulging pockets when measuring your bag.

Linear Dimensions
115.0cm
Max Allowed: 115 cm (45.3 in)
Packing Volume
46.0Liters
Courier Volumetric: 7.66 kg
Weight Compliance
No Limit
Lift to bin unassisted
Airport Sizer Verdict
Exceeds Sizer (FAIL)
Risk of gate check & overweight fees

Bag Dimensions vs American Airlines Max Sizer

Direct comparison of longest, second, and third dimensions against metal bin constraints.

American Airlines Policy Overview

Sizer Limits (L × W × H)56 × 36 × 23 cm (22 × 14 × 9 in)
Free Personal Item Allowance45 × 35 × 20 cm (18 × 14 × 8 in)
Weight EnforcementNo domestic weight cap
Carrier Notice:Must fit in overhead bin or under seat. No weight limit applies for domestic carry-on.

Airport Warning: Wheels, handles, and expanding zippers add 3–5 cm to published bag specifications.

Global Airline Carry-On Compliance Matrix

How your entered bag dimensions (55 × 38 × 22 cm, 8.5 kg) fit across major carriers.

AirlineMax DimensionsWeight CapSize CheckWeight CheckVerdict
American Airlines
USA / Domestic & International
56×36×23 cmNo Limit✗ Too Big✓ OKGate Check
Delta Air Lines
USA / Domestic & International
56×35×23 cmNo Limit✗ Too Big✓ OKGate Check
United Airlines
USA / Domestic & International
56×35×22 cmNo Limit✗ Too Big✓ OKGate Check
Southwest Airlines
USA / Domestic
61×40.5×25.5 cmNo Limit✓ Fits✓ OKApproved
British Airways
UK / Europe & Transatlantic
56×45×25 cm23 kg✓ Fits✓ OKApproved
Lufthansa
Germany / European Star Alliance
55×40×23 cm8 kg✓ Fits✗ OverweightGate Check
Ryanair
Europe (Budget Carrier)
55×40×20 cm10 kg✗ Too Big✓ OKGate Check
Emirates
Middle East / Global Long-Haul
55×38×20 cm7 kg✗ Too Big✗ OverweightGate Check

Worked Example: European Cabin Trolley on American Airlines vs Lufthansa

Evaluating a commercial rolling bag measuring 55 × 40 × 20 cm and weighing 8.5 kg:

Luggage Dimensions
55 cm (L) × 40 cm (W) × 20 cm (H)
Linear Sum
55 + 40 + 20 = 115.0 cm (45.3 in)
Gross Weight
8.50 kg (18.74 lbs)
Internal Volume
44.0 Liters (Volumetric Courier Weight: 7.33 kg)
Baggage Compliance Breakdown:
•1. American Airlines Check: Linear sum = 115 cm (passes 115 cm ceiling). However, dimension test requires Length ≤ 56 cm (pass), Width ≤ 36 cm (FAIL: bag is 40 cm, 4 cm over limit), and Height ≤ 23 cm (pass). No weight limit.
•2. Lufthansa Check: Maximum dimension = 55 × 40 × 23 cm. Dimensions pass (55 ≤ 55, 40 ≤ 40, 20 ≤ 23). However, weight limit is 8.0 kg (FAIL: bag is 8.5 kg, 0.5 kg over gate limit).
•3. British Airways Check: Maximum dimension = 56 × 45 × 25 cm, max weight 23 kg. Result: 100% compliant on both dimensions and weight.
•4. Volumetric vs Actual Weight: Volumetric courier weight = (55 × 40 × 20) / 6,000 = 7.33 kg. Note that airlines charge based on physical sizer dimensions and scale weight, not cargo volumetric formulas.

💡 Frequent Flyer Tip: Always verify individual Length, Width, and Height against physical airport metal sizers, not just the total linear sum ($L+W+H$), as bags with bulging side pockets frequently fail width tests.

Frequently Asked Questions

Authoritative Aviation & Passenger Baggage Guidelines

FAA - Federal Aviation Administration Passenger Baggage Regulations

Official United States aviation safety guidelines on cabin baggage stowage and overhead compartment weight constraints.

IATA - International Air Transport Association Cabin Baggage Guidelines

Global airline association recommendations on optimal cabin baggage dimensions and common sizer standards.

TSA - Transportation Security Administration Carry-on Rules

Security screening protocols for carry-on luggage, liquids (3-1-1 rule), and electronics.

Airports Council International - Terminal Baggage Standards

International airport operations benchmarks for gate boarding sizers and carry-on screening infrastructure.

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Quick Tips

  • 1Verify distance calculations
  • 2Consider traffic and delays
  • 3Check current rates and prices
  • 4Plan for contingencies