What Size Crate for My Dog?
Wondering what size crate for my dog? This free dog crate size picker takes your dog's height and length, applies the vet-recommended clearance rules, and snaps the result up to the standard crate sizes sold in stores — so you buy the right crate the first time.
Enter your dog's measurements
Your results
| Minimum interior length | — |
|---|---|
| Minimum interior height | — |
| Why | — |
Size guidance based on standard crate sizing conventions — not a substitute for professional advice.
How to use this calculator
Have your dog stand normally and measure two things in inches: height — from the floor to the top of the head or ears, whichever is taller — and length — from the tip of the nose to the base of the tail (don't include the tail). Enter both above and the recommendation updates instantly. The optional weight field adds a sturdiness tip for heavier dogs.
How it works
The widely recommended sizing rule is simple: a crate's interior must be at least your dog's length plus 4 inches and at least your dog's height plus 4 inches. That gives the dog room to stand fully upright, turn around, and lie down stretched out — the three postures a crate must allow.
Crates aren't sold in every length, so the picker snaps your minimum dimensions up to the smallest standard crate size that covers both: 18″, 24″, 30″, 36″, 42″, or 48″. It never rounds down, because a crate that's even slightly too short or too low fails the stand-and-turn test. Example: a dog that is 22″ tall and 26″ long needs at least 26″ of height (22 + 4) and 30″ of length (26 + 4), so the recommendation is a 30-inch crate.
Measuring tips: measure twice — a slouching dog will under-read. Add a little extra for very thick-coated breeds whose fur compresses in photos but not in life. If your dog is between sizes, always size up; a slightly roomy crate with a divider is better than a cramped one.
Puppy note: if you're crating a puppy, enter your puppy's expected adult measurements and buy that size. Most wire crates include a divider panel that shrinks the usable space while the puppy is small — this saves you from buying a second crate and keeps the space den-sized for house training.
Travel crates: airline and car travel crates use the same stand-up, turn-around rule, but also check your airline's specific crate requirements before flying — some require additional clearance or approved crate types.
Frequently asked questions
How do I measure my dog for a crate?
Have your dog stand normally. Measure length from the tip of the nose to the base of the tail (not the tail tip), and measure height from the floor to the top of the head or ears, whichever is taller. Write both in inches, enter them in the picker above, and it adds the recommended 4 inches of clearance and snaps up to a standard crate size.
Can a dog crate be too big?
Yes. A crate that is too roomy can slow house training because the dog may sleep at one end and use the other as a bathroom. The crate should be big enough for the dog to stand up, turn around, and lie down comfortably — that is length plus 4 inches and height plus 4 inches — but not much bigger. When in doubt between two sizes, size up rather than down.
What size crate do I need for a puppy?
Buy the crate size your puppy will need as an adult, based on expected adult height and length, and use the divider panel that comes with most wire crates to shrink the space while they are small. That saves you from buying a second crate and keeps the space den-sized for house training.
What are the standard dog crate sizes?
The most common standard crate lengths are 18, 24, 30, 36, 42, and 48 inches. Width and height grow with length, so an 18-inch crate suits very small dogs while a 48-inch crate suits the largest breeds. This picker rounds your dog's minimum dimensions up to the smallest standard size that fits.
What if my dog falls between two crate sizes?
Always size up, not down. A slightly roomy crate is far better than one your dog cannot stand up or turn around in. If the recommended size is larger than your dog's current body, you can use a divider panel to keep the usable space den-sized while giving them room to grow.