Dog Crate Size Calculator What Size Crate Does My Dog Need? Home, Puppy & Airline (IATA) Crates
Measure your dog twice and buy the crate once. Enter your dog’s length and height, or pick a breed, to get the right crate size (18″ to 54″), a to-scale fit check, divider placement for puppies, and the IATA formula for airline travel kennels.
By Manzoor Ahmad · Updated October 19, 2026
Length: tip of the nose to the base of the tail (not the tip). Height: floor to the top of the head or ear tips, whichever is higher, while standing. Use sitting height if it’s taller.
Recommended crate
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Standard crate sizes vs your dog
Green = best fit · light green = also fits · faded = too small. Typical wire-crate dimensions; brands vary by about an inch, so check the listing.
What size crate does my dog need?
Measure your dog’s length from nose to the base of the tail and its height from the floor to the top of the head, then add 2–4 inches to each. The crate should be at least that long and tall. Your dog should be able to stand without ducking, turn around and lie flat on its side. For example, a Labrador measuring 30 × 26 inches needs about 34 × 30 inches inside, which is a 42-inch crate. By weight, dogs under 10 lb usually fit 18–22″ crates, 41–70 lb dogs fit 36–42″, and dogs over 90 lb need 48–54″.
Key facts at a glance
- Home crate formula: length + 2–4 in and height + 2–4 in.
- Common sizes: 18″, 22″, 24″, 30″, 36″, 42″, 48″ and 54″. The number is the crate’s length.
- Airline crates (IATA): length = A + ½B, width = 2 × C, height = D + bedding, with 10% extra for snub-nosed breeds.
- Puppies: buy for the adult size and use a divider so the space stays den-sized during house training.
- Too big is a problem too: extra space in a puppy crate makes it easier to toilet in one corner and sleep in the other.
How to measure your dog for a crate
- Length (A): with your dog standing, run a soft tape from the tip of the nose to the base of the tail, where the tail meets the body. Don’t include the tail.
- Height (D): measure from the floor to the top of the head or the ear tips, whichever is higher. If your dog sits taller than it stands, use the sitting height.
- Add 2–4 inches to both. Use the larger allowance for dogs that like to stretch out, and for wire crates with a floor tray that raises the base.
- Compare with the crate’s interior, not just the listed size. Wire crates are usually about an inch smaller inside than the listed dimensions.
Dog crate size chart by weight
| Crate size | Dog weight | Crate length | Example breeds |
|---|---|---|---|
| Extra small | Under 10 lb | 18–22″ | Chihuahua, Yorkshire Terrier, Toy Poodle |
| Small | 11–25 lb | 24–30″ | Shih Tzu, Boston Terrier, French Bulldog, Miniature Schnauzer |
| Medium | 26–40 lb | 30–36″ | Cocker Spaniel, Beagle, Corgi, Border Collie, Bulldog |
| Large | 41–70 lb | 36–42″ | Labrador, Golden Retriever, Boxer, Australian Shepherd |
| Extra large | 71–90 lb | 42–48″ | German Shepherd, Rottweiler, Doberman, Akita |
| XXL | 91 lb and up | 48–54″+ | Great Dane, Mastiff, Saint Bernard, Newfoundland |
Weight bands and breed examples from PetSmart’s crate size chart. Body shape matters, so long, low breeds like Dachshunds and Basset Hounds often need a longer crate than their weight suggests.
Typical crate dimensions (length × width × height)
| Crate | Inches | Centimetres | Fits a dog up to about (L × H) |
|---|---|---|---|
| 18″ | 18 × 12 × 14 | 46 × 30 × 36 | 14 × 10 in |
| 22″ | 22 × 13 × 16 | 56 × 33 × 41 | 18 × 12 in |
| 24″ | 24 × 18 × 19 | 61 × 46 × 48 | 20 × 15 in |
| 30″ | 30 × 19 × 21 | 76 × 48 × 53 | 26 × 17 in |
| 36″ | 36 × 23 × 25 | 91 × 58 × 64 | 32 × 21 in |
| 42″ | 42 × 28 × 30 | 107 × 71 × 76 | 38 × 26 in |
| 48″ | 48 × 30 × 33 | 122 × 76 × 84 | 44 × 29 in |
| 54″ | 54 × 35 × 45 | 137 × 89 × 114 | 50 × 41 in |
Dog crate size by breed
Typical crate sizes for adult dogs of 40+ popular breeds. Individuals vary, especially across sexes and lines, so confirm with a tape measure.
| Breed | Adult weight | Recommended crate | Crate dimensions |
|---|---|---|---|
| American Pit Bull Terrier | 30–65 lb | 36″ (or 42″) | 36 × 23 × 25 in |
| Australian Shepherd | 40–65 lb | 42″ (or 36″) | 42 × 28 × 30 in |
| Basset Hound | 40–65 lb | 36″ (or 42″) | 36 × 23 × 25 in |
| Beagle | 20–30 lb | 30″ (or 36″) | 30 × 19 × 21 in |
| Belgian Malinois | 40–80 lb | 42″ (or 48″) | 42 × 28 × 30 in |
| Bernese Mountain Dog | 70–115 lb | 48″ (or 54″) | 48 × 30 × 33 in |
| Border Collie | 30–55 lb | 36″ (or 42″) | 36 × 23 × 25 in |
| Boston Terrier | 12–25 lb | 24″ | 24 × 18 × 19 in |
| Boxer | 50–80 lb | 42″ (or 48″) | 42 × 28 × 30 in |
| Bulldog | 40–50 lb | 36″ | 36 × 23 × 25 in |
| Cavalier King Charles Spaniel | 13–18 lb | 24″ | 24 × 18 × 19 in |
| Chihuahua | 2–6 lb | 18″ (or 22″) | 18 × 12 × 14 in |
| Cocker Spaniel (American) | 20–30 lb | 30″ | 30 × 19 × 21 in |
| Dachshund (Miniature) | 8–11 lb | 24″ | 24 × 18 × 19 in |
| Dachshund (Standard) | 16–32 lb | 30″ | 30 × 19 × 21 in |
| Doberman Pinscher | 60–100 lb | 48″ | 48 × 30 × 33 in |
| English Mastiff | 120–230 lb | 54″ | 54 × 35 × 45 in |
| French Bulldog | 16–28 lb | 30″ (or 24″) | 30 × 19 × 21 in |
| German Shepherd | 50–90 lb | 48″ (or 42″) | 48 × 30 × 33 in |
| German Shorthaired Pointer | 45–70 lb | 42″ | 42 × 28 × 30 in |
| Golden Retriever | 55–75 lb | 42″ (or 48″) | 42 × 28 × 30 in |
| Great Dane | 110–175 lb | 54″ | 54 × 35 × 45 in |
| Greyhound | 60–70 lb | 48″ | 48 × 30 × 33 in |
| Havanese | 7–13 lb | 24″ | 24 × 18 × 19 in |
| Jack Russell Terrier | 13–17 lb | 24″ | 24 × 18 × 19 in |
| Labrador Retriever | 55–80 lb | 42″ (or 48″) | 42 × 28 × 30 in |
| Maltese | 4–7 lb | 22″ | 22 × 13 × 16 in |
| Miniature Schnauzer | 11–20 lb | 24″ | 24 × 18 × 19 in |
| Newfoundland | 100–150 lb | 54″ | 54 × 35 × 45 in |
| Pembroke Welsh Corgi | 24–30 lb | 30″ (or 36″) | 30 × 19 × 21 in |
| Pomeranian | 3–7 lb | 22″ | 22 × 13 × 16 in |
| Poodle (Miniature) | 10–15 lb | 24″ | 24 × 18 × 19 in |
| Poodle (Standard) | 40–70 lb | 42″ (or 48″) | 42 × 28 × 30 in |
| Poodle (Toy) | 4–6 lb | 22″ | 22 × 13 × 16 in |
| Pug | 14–18 lb | 24″ | 24 × 18 × 19 in |
| Rottweiler | 80–135 lb | 48″ | 48 × 30 × 33 in |
| Shiba Inu | 17–23 lb | 30″ | 30 × 19 × 21 in |
| Shih Tzu | 9–16 lb | 24″ | 24 × 18 × 19 in |
| Siberian Husky | 35–60 lb | 42″ (or 36″) | 42 × 28 × 30 in |
| Yorkshire Terrier | 4–7 lb | 22″ | 22 × 13 × 16 in |
Airline dog crate size: the IATA formula
Airlines follow the International Air Transport Association (IATA) Live Animals Regulations, Container Requirement 1. Four measurements set the minimum internal size of the travel kennel:
A = nose to base of tail · B = floor to elbow · C = width across shoulders (or widest point) · D = floor to top of head or ear tip
Length = A + ½ B · Width = C × 2 · Height = D + bedding
Snub-nosed breeds: 10% larger container
Rigid and ventilated
Ventilation on all four sides, totalling at least 16% of the side area, over the upper two-thirds of the kennel.
Door and fittings
The door forms one full end of the container. Wheels must be removed or disabled, and food and water bowls are attached inside.
Check your airline
Airlines add their own rules on crate materials, hardware and breed restrictions, especially for snub-nosed dogs. Confirm before you buy.
Worked example: a Labrador-sized dog
- Measurements: length 30 in, height 26 in.
- Home crate: ideal interior 34 × 30 in, so a 42″ crate (about 42 × 28 × 30 in). A 36″ crate is long enough but only about 25 in tall, too low for this dog’s head.
- Airline crate (with B = 13 in, C = 10 in): minimum interior 30 + 6.5 = 36.5 in long, 10 × 2 = 20 in wide, 26 + 1 = 27 in high.
These are the calculator’s default values.
Choosing a crate for a puppy
Buy for the adult
Estimate adult size from the breed or with the puppy weight calculator, and buy the crate that will fit the grown dog.
Use a divider
Set the divider so the puppy has its current length plus 2–4 inches. That’s room to stand, turn and lie down, but not enough to toilet in a corner. Move it back as your puppy grows.
Re-measure monthly
Fast-growing large breeds can outgrow a divider setting in a few weeks. Check that your puppy can still stand and turn comfortably.
Wire, plastic, soft or heavy-duty crate?
| Type | Best for | Watch out for |
|---|---|---|
| Wire | Home use, puppies (dividers), airflow, folding flat | Less den-like. Add a cover for anxious dogs. |
| Plastic kennel | Air travel (IATA-style), cosy den feel, car trips | Less ventilation and visibility. Check the interior size. |
| Soft-sided | Calm, crate-trained dogs, travel and hotels | Not for chewers, escape artists or puppies. |
| Heavy-duty | Determined chewers and dogs that break out of crates | Heavy and expensive. Size carefully because they rarely fold. |
A pharmacist’s notes on crating and travel
- Think twice about sedatives for flying. Many airlines and veterinary bodies advise against sedating pets for air travel, because sedatives can affect breathing, balance and temperature control in the hold. If your dog is anxious, ask your vet about crate conditioning first, and only use medicines your vet prescribes and has trialled at home.
- Never give human sleep aids or anxiety pills. Products such as melatonin gummies may contain xylitol, and many human medicines are toxic to dogs.
- Remove collars and tags in the crate. They can catch on wire bars. Use a breakaway collar or none at all while crated.
- Chewed bedding can cause blockages. Puppies and chewers do better on a durable mat or bare tray until they’re trustworthy.
- Travel paperwork includes medicines. If your dog takes regular medication, pack enough with the original labels and a copy of the prescription when flying or crossing borders.
Related dog tools
These dexocalc tools help with sizing and planning for your dog:
Dog crate size FAQs
Measure from nose to the base of the tail and from the floor to the top of the head, then add 2–4 inches to each. Choose a crate at least that long and tall, so your dog can stand, turn around and lie down comfortably.
Most adult Labradors need a 42-inch crate (about 42 × 28 × 30 inches). Large males may need a 48-inch crate.
Typically a 48-inch crate (about 48 × 30 × 33 inches), because German Shepherds are long and tall. Smaller females may fit a 42-inch crate.
Yes, especially for puppies in house training, because extra space lets them toilet in one area and sleep in another. Use a divider to keep the space snug until your dog is reliably house-trained.
Buy the crate your puppy will need as an adult and use a divider. Set the space to the puppy’s current length plus 2–4 inches, and move the divider back as it grows.
The number is the crate’s length in inches. Width and height increase with length, but brands differ slightly, so check all three dimensions against your dog.
Measure A (nose to tail base), B (floor to elbow), C (width at the shoulders) and D (floor to head or ear tip). IATA’s minimum interior size is length A + ½B, width 2 × C and height D plus bedding, with 10% extra for snub-nosed breeds.
Yes. Your dog should be able to stand without its head or ears touching the top, turn around easily and lie flat on its side.
Wire crates are best for home use and puppies thanks to airflow, visibility and dividers. Plastic kennels feel more den-like and are usually required for air travel.
Usually a 24- or 30-inch crate. As a snub-nosed breed, a French Bulldog needs good ventilation, and airline crates must be 10% larger than the standard formula.
It depends on age, training and bladder control. Adult dogs shouldn’t be crated for most of the day without breaks for exercise, toileting and company. Puppies need frequent breaks, and your vet or trainer can help set a schedule.
Usually yes, for adult dogs, especially if the smaller crate fails on height. For puppies, buy the adult size and use a divider instead.
Manzoor Ahmad
Pharmacist & health writer · 13+ years of web development and SEO experience
Manzoor is a pharmacist with more than nine years of experience writing evidence-based pet and human health content. This calculator applies the widely used 2–4 inch crate sizing rule, typical retail crate dimensions and weight bands, and IATA’s published Container Requirement 1 formula for airline kennels. It’s an educational tool. Always check the manufacturer’s interior dimensions and your airline’s current rules.
Sources
Disclaimer: This dog crate size calculator gives estimates based on your measurements and typical crate dimensions. Crate sizes vary by manufacturer, and airline rules change. Always check interior dimensions before buying, and confirm travel kennel requirements directly with your airline.