Dog crate, food, harness, collar and bed sizes — worked out and checked
Thirteen sizing tools for dogs and cats. Put in one measurement and get the size to compare against a product chart — and where a number is our own estimate rather than a published standard, the page says so.
Every figure is either quoted from a published source or labeled as our own estimate — and the tables show the number each figure was derived from, so you can re-run the arithmetic instead of trusting it.
Dog crate sizes
Ready when you are
Enter your dog’s weight below.
Nothing you type is stored on our server.
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How to measure. While your dog is standing, measure from the tip of their nose to the base of their tail — not the tail tip. Then add 2–4 inches for movement and bedding. The full crate calculator shows both measurements on a diagram.
That is the size to shop — the matching products are listed below.
Every tool on this site
Dog Crate Sizes Calculator
Work out which crate length your dog needs, and why.
Takes your dog's weight, height or breed and turns it into a crate length. Includes the 24-breed table and the measuring guide.
Open the tool →Dog Weight Calculator
What should your dog weigh? Compare with the AKC range for its breed.
Enter a weight and pick a breed: you get the AKC adult range, where your dog sits against it, and the body-condition check that matters more than the scale.
Open the tool →Dog Feeding Calculator
Turn the feeding table on your dog food bag into cups per meal.
You type the amount printed on your bag; it works out the portion, the grams, and how long the bag lasts. We do not invent a feeding amount.
Open the tool →Dog Harness Size Chart
Chest girth, and why a “medium” is not the same in every brand.
Measures the one number harnesses are built around, then checks it against the ranges on the harness you are actually buying.
Open the tool →Dog Collar Size Chart
Neck size — and why it is not the length of the collar.
The most common collar mix-up, sorted out: the size refers to the neck, not the strap. Includes the collar-versus-harness comparison.
Open the tool →Dog Crate Size Chart by Breed
53 breeds, with the weight every figure was derived from.
A lookup table built from AKC breed weights, showing you the weight behind each crate length so you can check our arithmetic.
Open the tool →Dog Bed Size Chart
Bed length from your dog's body length, and how it sleeps.
Measure nose to tip of tail, then add room for a curled, side or sprawled sleeper. Includes why bed size names are not a standard.
Open the tool →Dog Calorie Calculator
Daily calorie range, reproduced from the published WSAVA chart.
Enter your dog's weight for the published kcal range — plus what we found when we checked the chart's own arithmetic.
Open the tool →Puppy Feeding Chart by Age
How many meals a day at each stage of the first year.
The AKC first-year feeding timeline, plus a calculator that splits your bag's daily amount into meals.
Open the tool →Dog Age Calculator
Dog years to human years — two published methods, side by side.
The AVMA curve and the 2019 epigenetic clock formula, shown together with the gap between them. Includes why multiply-by-seven is wrong.
Open the tool →Puppy Growth Chart Selector
Which growth chart fits your puppy, and how often to weigh.
The chart is not a weight predictor — it checks growth. Includes the 12-week rule and the giant-breed limit.
Open the tool →Cat Age Calculator
Cat years to human years, and the life stage that goes with it.
The International Cat Care table, plus where two veterinary bodies disagree on when a cat becomes senior.
Open the tool →Cat Litter Box Size
How big a litter box, and how many you actually need.
The 1.5-times-the-cat rule, why the veterinary guideline says most boxes are too small, and the one-per-cat-plus-one rule.
Open the tool →Questions we get a lot
Are these tools free?
Yes. No signup, no email, and nothing you type is sent to a server — every calculation runs in your browser.
Do you show prices?
No. Where we link to a shop, we link to a search rather than a fixed price, because prices move and we would rather not show you a stale number.
Where do your numbers come from?
Each page says so at the bottom. Some figures are quoted from published sources; the ones that are our own estimates are labeled that way, and several pages let you check the arithmetic yourself.
My dog is between two sizes. What then?
Take the larger one where the item adjusts — a slightly loose harness or collar can be tightened, but a tight one cannot be made bigger. For crates, buy the adult size and use a divider while a puppy grows.
Can you tell me what size my dog is without me measuring?
Not reliably. Weight is a rough proxy for length at best, and breed is even rougher. Every calculator here is built around a measurement you take, with the tables as a fallback.
Is any of this veterinary advice?
No. These are measuring and sizing tools. Feeding amounts come off your dog food bag, and anything about health, weight or a special diet is a question for your vet.
How we work, and why you can check our numbers
Most sizing sites hand you a number and stop. We try to show our work, because a size you cannot check is a size you have to trust blindly.
Published figures are labeled as published
Where a number comes from an authority — the American Kennel Club's breed weights, the Humane Society's crate guidance, AAFCO's label rules — the page quotes it and links to the source.
Our own estimates are labeled as ours
Some figures on this site are ours: the weight-to-crate-length mapping, the "common range" tables, the fit checks. Those are marked as our own rather than dressed up as a standard, and the page usually shows you how to re-run the arithmetic yourself.
What we deliberately do not do
- We do not publish a feeding amount of our own — the bag's feeding table wins.
- We do not guess a harness or collar size from your dog's breed.
- We do not show live prices, and we do not give veterinary advice. For anything about your individual dog's health, ask your vet.
Last updated: 2026-10-19.