Calpak Terra 26L Laptop Duffel Backpack: 18 x 12 x 7.5 in

26l-backpack-duffel, backpack, no wheels, 2.9 lb empty. Exterior figures are the maker's own.

MeasurementsManufacturer spec · 2026-07-09
Calpak Terra 26L Laptop Duffel Backpack, carry-on suitcase, 18 by 12 by 7.5 inches
Height18 inWidth12 inDepth7.5 in
Exterior18 x 12 x 7.5 in
Weight2.9 lb
Expandsno
Shellbackpack
Wheelsno wheels

The maker's exterior figure excludes wheels and handles, so the bag's real footprint in an airline sizer is larger than these numbers.

At the gate

Cabin approved at 19 of 19 airlines

19 of 19 carry-on sizers3 of 13 under-seat limits

The table below shows the verdict at every airline, best fit first, using the same math as the live fit checker. For why so many carry-ons fail the US standard box, see our 22 x 14 x 9 breakdown.

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Does the Terra 26L Laptop Duffel Backpack fit? All 19 airlines

18 x 12 x 7.5 in against each airline's published carry-on box, largest side to largest side, sorted best fit first.

AirlineCabin max (in)VerdictUnder seat
Sun Country Airlines24 x 16 x 11Cabin approved3.5 in to spareNo
Allegiant Air22 x 16 x 10Cabin approved2.5 in to spareYes
British Airways22 x 18 x 10Cabin approved2.5 in to spareNo
Frontier Airlines24 x 16 x 10Cabin approved2.5 in to spareYes
Southwest Airlines24 x 16 x 10Cabin approved2.5 in to sparenot published
Air France21.7 x 13.8 x 9.9Cabin approved1.8 in to spareNo
Qatar Airways19.69 x 14.57 x 9.84Cabin approved1.7 in to sparenot published
Lufthansa21.65 x 15.75 x 9.06Cabin approved1.6 in to spareNo
Turkish Airlines21.65 x 15.75 x 9.06Cabin approved1.6 in to spareNo
Air Canada21.5 x 15.5 x 9Cabin approved1.5 in to spareNo
Alaska Airlines22 x 14 x 9Cabin approved1.5 in to sparenot published
American Airlines22 x 14 x 9Cabin approved1.5 in to spareYes
Avelo Airlines22 x 14 x 9Cabin approved1.5 in to spareNo
Delta Air Lines22 x 14 x 9Cabin approved1.5 in to sparenot published
Hawaiian Airlines22 x 14 x 9Cabin approved1.5 in to sparenot published
JetBlue Airways22 x 14 x 9Cabin approved1.5 in to spareNo
United Airlines22 x 14 x 9Cabin approved1.5 in to spareNo
Emirates21.65 x 14.96 x 8.66Cabin approved1.2 in to sparenot published
Ryanair21.65 x 15.75 x 7.87Tight squeeze0.4 in to spareNo

Bag spec source: calpaktravel.com · accessed 2026-07-09. Airline limits come from each carrier's official baggage page; open an airline above for its citations. Policies change, so verify a borderline case before you fly.

How Calpak measures

Calpak states all luggage dimensions in inches on its own product pages. For hardside luggage (Ambeur, Hue) the specifications section explicitly labels the larger figure Exterior, Including wheel, with a separate smaller Interior figure for packing space, so the exterior number already accounts for wheels and handles. For softside duffels and the Terra backpack duffel it publishes a single Dimensions figure since those bags have no wheels. On at least two Ambeur and one Terra product page, an older marketing bullet elsewhere on the same page states a slightly different, usually lower, dimension or weight than the labeled specifications section; the labeled specifications figure was treated as authoritative in this dataset, with the alternate figure noted per bag.

All 12 Calpak bags