2026 IATA CR1 is the public baseline for this single-animal estimate. Length = A + B/2, width = 2C (widest point), and internal height = D + measured bedding. The catalog is nominal; confirm usable interior dimensions, standing/sitting/turning/lying space, additional breed requirements and carrier acceptance. No listed fit is returned above the catalog. This calculator does not certify a crate or guarantee acceptance.
How the Dog Travel Crate Size Calculator works
2026 IATA CR1 is the public baseline for this single-animal estimate. Length = A + B/2, width = 2C (widest point), and internal height = D + measured bedding. The catalog is nominal; confirm usable interior dimensions, standing/sitting/turning/lying space, additional breed requirements and carrier acceptance. No listed fit is returned above the catalog. This calculator does not certify a crate or guarantee acceptance.
Ventilation on all four sides, with total openings at least 16% of the four-side surface area; confirm the complete CR1 construction and performance requirements with the carrier.
Inputs and what they mean
All four measurements should be taken with the dog standing naturally, not sitting or crouching. Nose-to-tail length and standing height typically have the biggest effect on which size is recommended, since airlines' standard kennel sizes step up in fairly large increments. If you don't have a tape measure handy, the By Weight tab gives a rough size estimate based on typical breed proportions — but it's a starting point only, since two dogs of the same weight can have very different body shapes and require different crate sizes.
Limits and edge cases
This calculator estimates the IATA baseline minimum only. Individual airlines frequently add their own requirements on top — extra interior clearance, combined dog-plus-crate weight limits, embargo dates during hot weather, or breed restrictions (particularly for brachycephalic/flat-faced breeds). Always confirm the exact requirements directly with the airline before booking travel, and never use this tool as your only source for a live-animal transport decision.