Dog Crate Size Calculator
Find the right crate dimensions for your dog based on body length and shoulder height.
Results are estimates only — not a substitute for veterinary advice.
Measure from the tip of the nose to the base of the tail (not tip of tail)
Measure from the floor to the top of the shoulders while standing
How the crate size calculator works
The right crate allows your dog to:
- Stand upright without hunching
- Turn around completely
- Lie stretched out comfortably
The formulas used are simple additions to your dog's actual measurements:
Crate length = body_length + 4 inches Crate height = shoulder_height + 4 inches
These recommended dimensions are then rounded up to the nearest standard commercial crate size: 18", 24", 30", 36", 42", or 48". Most wire and plastic crates are sold in these increments.
Tip for puppies: Buy a crate sized for the expected adult weight, and use a divider panel to reduce the interior space during house-training. This prevents puppies from using one corner as a bathroom.
Limitations: These are minimum recommended dimensions. Some owners prefer a slightly larger crate for adult dogs who are already house-trained. For airline travel, always check the airline's specific crate requirements, which may differ from general guidelines.
Frequently Asked Questions
The correct crate size allows your dog to stand up fully, turn around comfortably, and lie down stretched out. Measure from the tip of the nose to the base of the tail (body length) and add 4 inches for the crate length. Measure shoulder height standing and add 4 inches for crate height. Our calculator maps these to the nearest standard commercial size (18" to 48").
For house-training, a crate that is too large is counterproductive—dogs may use one end as a bathroom. For trained adult dogs, a bigger crate can be fine. The 'just right' size (body length + 4") is the sweet spot for crate training, and you can always use a divider panel in a larger crate while your puppy grows.
Have your dog stand on a flat surface. Measure from the tip of the nose to the base of the tail—not the tip of the tail—for body length. For height, measure from the floor to the top of the shoulder (withers). Add 4 inches to each measurement. These two numbers tell you the minimum crate dimensions needed.
Standard wire and plastic crates come in these common sizes: 18" (XS, toy breeds), 24" (S, small breeds), 30" (M, medium breeds), 36" (L, large breeds), 42" (XL, large to giant breeds), and 48" (XXL, giant breeds). Our calculator finds the nearest size that meets your dog's measurements.
If you buy a crate sized for the adult dog, use an adjustable divider panel to make the space smaller during training. This prevents the puppy from using part of the crate as a bathroom while still giving you a crate that will last the dog's lifetime.