Pet Travel Crate Airline Calculator

Measure your pet, enter the dimensions and get the recommended airline crate size.

How it is calculated

All four measurements are in inches and all must be above zero. Pet length is nose to base of tail, leg is the length of the front leg, shoulder is the width across the shoulders and standing is the height from the floor to the top of the head or ears while the pet stands. The tool applies three rules: crate length = pet length + leg ÷ 2, crate width = shoulder × 2 and crate height = standing + 3. Results are shown to one decimal, with no rounding up to a catalogue size. The crate you buy should be at least this big, so choose the next larger model. Individual airlines and countries add their own rules on materials, ventilation and maximum size, so check them with your carrier.

Worked example

A dog is 30 in long from nose to tail base, has a 12 in front leg, a 9 in shoulder width and stands 22 in tall. Length: 30 + 12 ÷ 2 = 36 in. Width: 9 × 2 = 18 in. Height: 22 + 3 = 25 in. The recommended crate is 36.0 × 18.0 × 25.0 in (length × width × height), or about 91 × 46 × 64 cm. A standard model that is slightly larger in each direction would be a safe pick.

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Common mistakes

  • Entering centimetres. The formulas and the 3 in clearance are in inches, so a 76 cm length typed as 76 would give a crate more than twice too long.
  • Measuring body length from the neck or including the tail. Length runs from nose to the base of the tail.
  • Using shoulder height for the width field. The field wants the width across the shoulders, which the tool doubles.
  • Measuring standing height with the head down. Measure with the pet standing naturally, to the top of the head or the ears if they stand up.
  • Buying a crate with exactly these dimensions. Round up to the next available size, and confirm your airline's own limits before you buy.

About this calculator

Airlines that ship pets in the cargo hold follow the IATA Live Animals Regulations (LAR), which set minimum crate dimensions so an animal can stand, turn around, and lie down naturally. The rule of thumb is length = nose-to-tail body length plus half the leg length, width = shoulder width × 2, and height = standing height from floor to the top of the head or ears, plus 3 inches of clearance.

Airlines, freight forwarders, and pet relocation companies use these dimensions to reject or approve a crate at check-in, so an undersized crate can mean a pet is turned away at the gate. This calculator takes the length, leg, shoulder, and standing-height measurements you enter in inches and gives the minimum crate length, width, and height to one decimal place. It does not round to a standard commercial crate size, so choose the next size up that is at least this large.

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