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Pet Travel Crate Size Calculator

Size an airline crate for a dog or a cat with the IATA formula — length A + ½B, width 2C, height D — in both sizing systems: the US 100–700 series and the European Atlas 10–80, in inches and cm.

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Pet Travel Crate Size Calculator works straight from this page — free, instant, nothing to install. It sits under Pets & animals in our catalogue, alongside Pet Insurance Calculator and Bird Cage Size Calculator.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What does Pet Travel Crate Size Calculator do?

Size an airline crate for a dog or a cat with the IATA formula — length A + ½B, width 2C, height D — in both sizing systems: the US 100–700 series and the European Atlas 10–80, in inches and cm.

When would I actually use this?

Day-to-day care: how much to feed at a given weight, whether a size is right for the breed, and what a life stage means in human terms.

What is the most common mistake?

Using the seven-years rule for a dog's age. Ageing is fast in the first two years and then slows, and it slows much more for a small breed than for a large one — the multiplier is not a constant.

How is Pet Travel Crate Size Calculator different from Pet Insurance Calculator?

They sit next to each other but answer different questions. Pet Insurance Calculator: compare a lifetime of vet bills paid out of pocket against an insured one, year by year, with the deductible, reimbursement rate and annual cap applied. Pick whichever matches what you're starting from — both are free.

Is there a tool for the next step?

Bird Cage Size Calculator is the closest one after this: Minimum cage dimensions and safe bar spacing for eleven species, from finches to macaws, in inches and centimetres.

What else is worth having open alongside it?

Aquarium Heater Wattage Calculator and Aquarium Substrate Calculator — they come up in the same task often enough to be worth a second tab.

Where do the figures come from?

Portions follow published feeding guidelines by species and weight; age equivalences use the size-dependent curves rather than a flat multiplier. None of this replaces a veterinarian, especially for an animal that is unwell.

Further reading

All guides →
How-toThe IATA Crate Formula an Airline Measures at Check-InLength A + half B, width twice C, height D. The width rule is the one that fails people: a dog with 28 cm shoulders needs 56 cm of interior width, and no crate sold by weight rating tells you that.GuideBar Spacing Is the Cage Rule That Actually MattersA budgie needs bars 10 to 13 mm apart and a macaw 25 to 38. Put the budgie in the macaw cage and it can get its head through — the size is a welfare question, the spacing is a safety one.ExplainerFerguson Zones, and the Lamp Distance They ImplyThe same Ferguson zone 3 puts a compact lamp 18 to 30 cm above the basking site and a 54 W tube 74 to 127. The zone describes the animal; the distance belongs to the lamp, and a mesh screen moves it again.How-ton + 1 Litter Boxes, and What the Litter Actually CostsTwo cats need three boxes, not two, and each should be one and a half body lengths long — 69 cm for an average adult. The litter figure that follows is larger than most people expect, and knowing why is the useful part.ExplainerHow Big Will This Puppy Get? The Size Class DecidesThe same 12.7 kg puppy at sixteen weeks predicts a 21.9 kg adult if it is a small breed and 38.5 kg if it is a giant one. The arithmetic is trivial; the class you pick is worth seventy-six per cent.ExplainerPet Insurance: the Answer Flips on One AssumptionOver fourteen years the same French dog costs 4,387 more insured if it stays healthy and 15,124 less if it develops a chronic condition. Every other input is arithmetic; the claim curve is the whole decision.