Dog Crate Size Calculator
Dog crate length, height, and size band.
What it does
Crates size from the dog, not the room: length plus room to stretch and height plus room to stand. This page adds fixed allowances to both measures and maps length to standard crate bands from Small to XXL.
The default is a 30 in long, 24 in tall dog. The crate need is 36 by 28 in, which maps to Large (36 in). Metric defaults convert the same dog to 76 by 61 cm and give 91 by 71 cm in the same band.
Measure standing, not lying. Length stops at the tail base since tails curl past walls, and height includes ears for prick eared breeds. Tape twice while the dog stacks naturally rather than stretched.
Bands are buy sizes. Pick the band at or above need so the dog turns freely, and use dividers for puppies so the den stays small enough to keep clean while they grow.
How to use
- Pick imperial or metric first.
- Enter dog length (tail base).
- Enter standing height.
- Read crate length first, then height.
- Buy the band size at or above need.
Formula
- dog L
- Dog nose to tail base.
- dog H
- Dog floor to head top standing.
Crates should let the dog stand, turn, and lie flat without crouching. Length runs nose to tail base (not tail tip) and height runs floor to ear top standing. Puppies outgrow math fast, so buy dividers and remeasure monthly.
Worked example
Example: medium to large dog
30 in long, 24 in tall dog (metric 76 by 61 cm).
- Crate length: 30 + 6 = 36 in.
- Crate height: 24 + 4 = 28 in.
- Band: 36 lands Large (36 in).
- Metric: 76 cm dog needs 91 cm crate.
- Tool shows 36 in long, 28 in tall, Large.
Reference table
| Crate | Fits dog to | Use |
|---|---|---|
| 24 in | 18 in | Small breeds |
| 30 in | 24 in | Medium breeds |
| 36 in | 30 in | Large breeds |
| 42 in | 36 in | XL breeds |
| 48 in | 42 in | XXL breeds |
Limits
- Pet comfort guide, not airline or vet rule.
- One dog per pass. Pairs need separate crates.
- Allowances fixed. Giant breeds vary.
- Puppies need rechecks.
Common mistakes
- Measuring to tail tip instead of base.
- Sizing by weight instead of length.
- Buying below need to save space.
- Skipping dividers for puppies.
- Forgetting ear height on tall breeds.
Try it yourself
Quick checks. Answers sit tucked under each question.
22 in long, 20 in tall dog?
28 in long (22 + 6), 24 in tall (20 + 4), Small? 28 lands Medium (30 in).
42 in long dog?
48 in long (42 + 6), XXL.
Questions
What crate length?
Dog length plus 6 in. Here 36 in.
What crate height?
Dog height plus 4 in. Here 28 in.
Size bands?
Up to 24 Small, 30 Medium, 36 Large, 42 XL, else XXL.
What is that in metric?
91 cm long, 71 cm tall, same Large band.
Weight or size?
Measure standing height and nose to tail base, not weight.
Puppy crate?
No. Puppies need dividers and rechecks as they grow.