Free Pet Travel Carrier Size calculator with clear step-by-step results.
Uses the standard IATA sizing rules: internal length is nose to tail base plus half the front leg length, height must clear the top of the head or ear tips with a few centimetres to spare, and width is twice the animal's widest point so it can turn around.
Minimum length
Length = nose to tail base + half the front leg length
Minimum width
Width = 2 x width at the widest point
Airline and country requirements for pet travel containers, ventilation, labelling and documentation vary and are strictly enforced. Confirm the exact specification with the carrier and destination authority before booking.
Yes. IATA rules require the animal to stand, turn around and lie down naturally, which is why height is measured to the ear tips rather than the shoulder.
No. Cabin carriers are limited by the airline's under-seat dimensions, which are often smaller than these welfare minima - meaning larger animals must travel as checked baggage or cargo.