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Litter & Boxes

How to Choose a Cat Litter Box: The Complete Buying Guide

Oh My Cat · Updated 2026-07-19 · 10 min read
How to Choose a Cat Litter Box: The Complete Buying Guide
Bottom lineChoose a litter box at least 1.5 times your cat's length from nose to base of tail — around 24 inches for an average adult. Favor an open or high-sided design over a hooded one for ventilation and easy scooping, match entry height to your cat's mobility (3 inches or under for kittens and seniors), and provide one more box than you have cats, placed in separate quiet locations away from food.
Contents

The Short Answer

If you skip everything else on this page, take this much: buy a box at least 1.5 times the length of your cat from nose to base of tail, favor an open or high-sided design over a hooded one unless you have a specific reason, and put out one more box than you have cats. Those three decisions prevent the vast majority of litter box problems people write to us about — boxes that get snubbed, litter kicked across the floor, and the dreaded "going next to the box instead of in it."

Everything else — top-entry versus front-entry, plastic versus stainless, whether an automatic unit is worth the money — is a matter of matching the box to your cat, your space, and your tolerance for scooping. This guide walks through each decision in the order that actually matters.

Quick picks by situation:

How We Judge Litter Boxes

Our evaluation criteria are the same for a $12 pan and a $600 robot, because cats hold both to the same standard:

  1. Size relative to the cat. The single biggest predictor of whether a box gets used consistently. Cats want room to turn, dig, and position without touching the walls.
  2. Entry height and accessibility. A box a kitten or arthritic senior can't comfortably climb into is a box that won't get used.
  3. Ease of cleaning. Smooth surfaces, no scent-trapping crevices, and a shape a scoop can actually reach into. If cleaning is annoying, it happens less, and cats notice.
  4. Litter containment. High sides, top entries, and lips all reduce scatter — but never at the cost of the first two criteria.
  5. Material and durability. Whether the box resists scratching, staining, and odor absorption over years, not weeks.

Notice what's not on the list: how the box looks in your living room. Aesthetics are a legitimate tiebreaker, but a box chosen primarily for style is how people end up with a beautiful object their cat refuses to enter.

Start With Size: The Spec Most People Get Wrong

Walk down any litter aisle and you'll see boxes that are frankly too small for an average adult cat. The widely used rule of thumb — and the one we endorse — is that a box should be at least 1.5 times your cat's body length, measured from the nose to the base of the tail (not including the tail itself).

For a typical 18-inch adult cat, that means a box around 24 inches long inside. Many standard boxes sold as "large" measure 16 to 19 inches. That gap explains a lot of over-the-edge accidents and reluctant, perch-on-the-rim posture.

Measuring your cat

Get a soft tape measure or just note where your cat's nose and tail base fall against a yardstick while they're standing. Then check the box's interior dimensions, not the exterior ones on the packaging — walls, hoods, and rims can eat two or three inches.

If you're between sizes, go bigger. We have never once heard of a cat rejecting a box for being too spacious. Underbed storage totes, incidentally, are a well-known budget workaround: long, wide, high-sided, and often cheaper than purpose-built boxes of the same footprint.

Special sizing cases

The Main Types, Honestly Compared

There are five basic designs worth knowing. Each has a real use case, and each has a drawback the packaging won't mention.

Open pans

The default for a reason. Open boxes offer the easiest access for the cat, the best ventilation, the fastest scooping for you, and the clearest sightlines — which matters more than people think, since many cats prefer to see the room while they're vulnerable.

Why we like them: they satisfy every one of our criteria except litter containment, and a high-sided version fixes most of that.

Worth knowing: a standard low-sided open pan contains almost nothing. Enthusiastic diggers will redecorate the floor. If you buy open, buy high-sided (5 inches or more on three sides) unless you have a kitten or senior who needs low walls all around.

High-sided boxes

An open pan with 8-to-12-inch walls and a single lowered entry. This is our default recommendation for most adult cats: it keeps the ventilation and easy access of an open box while stopping the majority of scatter and over-the-edge misses (common with cats who stand tall to urinate).

Why we like them: the best containment-to-accessibility ratio of any design.

Worth knowing: the lowered entry is still a step, and the tall walls make these boxes bulky visually. Check the entry height against your cat's mobility — 5 to 6 inches is fine for healthy adults, too much for seniors with joint trouble.

Covered (hooded) boxes

A hood keeps litter in, blocks the view of what's inside, and gives shy cats a sense of enclosure. Owners tend to love them; cats are split.

Why some cats do well with them: genuinely nervous cats sometimes prefer the enclosure, and the hood stops over-the-edge spraying completely.

Worth knowing: hoods trap odor inside the box, which is more pleasant for you and less pleasant for the cat standing in it. They also slow down scooping (the hood has to come off), hide waste so problems get noticed later, and can make a cat feel cornered in multi-cat homes where ambushes at the box are a thing. If you use one, remove the door flap — most cats dislike pushing through it — and scoop with extra discipline.

Top-entry boxes

The cat enters through a hole in the lid and drops in. Top entries are the single best design for litter tracking, because litter falls off the cat's paws onto the lid on the way out, and they're effectively dog-proof and toddler-proof.

Why we like them: unbeatable containment, small footprint for the interior volume they offer.

Worth knowing: they demand a fit, confident cat. Kittens, seniors, overweight cats, and cats with any joint stiffness should not be asked to jump in and out of a box through a roof hole. They're also the slowest design to scoop. Buy one only for a healthy adult cat, and keep an alternative available at first in case it's rejected.

Automatic (self-cleaning) boxes

A motorized unit rakes or rotates waste into a sealed compartment after each visit. For the right household — busy schedules, multiple cats, strong scoop aversion — they're genuinely useful, and the category has matured a lot.

Why they earn a place: waste is removed within minutes of every use, which is a cleanliness standard almost no human scooper matches, and odor control benefits accordingly.

Worth knowing: they cost roughly ten to forty times what a good pan costs, most require specific litter types, the mechanisms still need regular hand-cleaning despite the "self-cleaning" name, and some cats never accept the noise or motion. Sizing matters even more here, since interior space is often tighter than the exterior suggests. We go deep on what to check before spending in our guide to automatic litter boxes.

Comparison at a glance

Type Best for Litter containment Ease of cleaning Accessibility Typical price range*
Open pan Kittens, seniors, cautious cats Poor–fair Excellent Excellent $8–$25
High-sided Most adult cats Good Very good Good (check entry) $15–$45
Covered/hooded Shy cats, spray-prone cats Very good Fair Good $20–$50
Top-entry Healthy adults, homes with dogs Excellent Fair Limited $25–$60
Automatic Busy or multi-cat households Good–very good Good (machine varies) Varies by model $150–$700

*Editorial ranges only — prices vary widely by size, brand, and retailer.

Materials: Plastic, Stainless, and Everything Else

Standard plastic is what most boxes are made of, and it's fine — for a while. Plastic scratches as cats dig, and those micro-scratches gradually harbor odor no amount of scrubbing fully removes. Plan to replace a plastic box roughly every one to two years, sooner if it holds smell after a wash.

Stainless steel boxes have moved from veterinary clinics into homes, and we think the trend is justified. Steel doesn't scratch the way plastic does, doesn't absorb odor, and cleans up completely. The trade-offs: higher upfront cost, more noise when litter is scooped against the sides, and cold-to-the-touch walls that a few cats mind.

High-quality rigid plastics (the thicker, smoother pans) split the difference — more durable than bargain-bin flexible plastic, cheaper than steel.

Avoid boxes with textured interiors, molded ridges, or seams along the floor. Every groove is a place waste lodges and a scoop can't reach.

Entry Height: The Kitten and Senior Test

Entry height is where accessibility lives or dies:

Some high-sided boxes offer a genuinely low entry cutout; many claim to and measure 6 inches anyway. Check the actual number.

How Many Boxes, and Where They Go

The standard guideline — one box per cat, plus one — exists because cats are territorial about elimination sites and because more boxes means cleaner boxes between scoopings. One cat, two boxes. Three cats, four boxes. In multi-story homes, at least one per floor regardless of cat count.

Placement rules that earn their keep:

Pairing the Box With the Right Litter

The box and the litter are one system. A great box filled with a litter your cat hates still fails. Broad guidance:

Whatever you choose, scooping cadence matters as much as litter choice — our litter changing schedule covers what "clean enough" actually means, box by box and litter by litter.

What to Spend

Honest budget expectations, as of this writing:

Prices vary by size and retailer, but the shape of the market is stable: the difference between a $15 box and a $40 box is real (thicker walls, better entry design, smoother interior), while the difference between a $40 box and an $80 non-automatic box is mostly material and styling. Spend on size and design first, material second, looks last.

The Bottom Line

Choosing a litter box well is mostly about resisting two temptations: buying the box that looks best in your home, and buying the box that's easiest to hide. Cats vote with their behavior, and their ballot reliably favors big, open, clean, and easy to enter.

Run your shortlist through this checklist before buying:

Get those five right and the fancier questions — steel or plastic, robot or scoop — become upgrades to a working system rather than rescue attempts for a failing one.

FAQ

What size litter box does my cat need?

The box should be at least 1.5 times your cat's body length, measured from nose to the base of the tail. For a typical 18-inch adult cat, that means roughly 24 inches of interior length. Check interior dimensions, not the packaging's exterior numbers, since walls and rims can eat several inches. When in doubt, size up — cats don't reject boxes for being too spacious, and large breeds like Maine Coons often need 26 inches or more.

Are covered litter boxes bad for cats?

Not inherently, but they involve real trade-offs. Hoods trap odor inside the box where the cat stands, slow down scooping, and can make cats feel cornered in multi-cat homes. Some genuinely shy cats prefer the enclosure, so temperament matters. If you use a hooded box, remove the door flap, scoop diligently, and watch for avoidance. For most cats, a high-sided open box contains litter nearly as well with better ventilation.

How many litter boxes should I have?

The standard guideline is one box per cat, plus one — so two boxes for one cat, four for three cats. Multiple boxes reduce territorial conflict and keep each box cleaner between scoopings. Placement matters as much as count: spread boxes across separate locations rather than lining them up in a row, since adjacent boxes function as a single territory. In multi-story homes, keep at least one box per floor.

Are top-entry litter boxes good?

For healthy, agile adult cats, top-entry boxes are excellent at containing litter — paws shed litter onto the lid on the way out — and they keep dogs and toddlers out of the box. But they require jumping in and out through a roof hole, which rules them out for kittens, seniors, overweight cats, and any cat with joint stiffness. They're also slower to scoop than open pans, so keep a backup box available while your cat adjusts.

Is a stainless steel litter box worth it?

Often, yes. Plastic boxes develop micro-scratches from digging that gradually trap odor no scrubbing removes, which is why plastic pans generally need replacing every year or two. Stainless steel resists scratching, doesn't absorb odor, and cleans up completely, so a steel box can outlast several plastic ones. The trade-offs are higher upfront cost — typically $40 to $90 — noisier scooping, and cold walls that a small number of cats dislike.

Why is my cat suddenly avoiding the litter box?

Common causes include a box that's too small, a dirty box, a new litter, a hood or location the cat dislikes, or ambushes by another cat. But sudden avoidance in a previously reliable cat can also signal medical problems, including urinary issues and the joint pain that makes climbing into a tall box uncomfortable for seniors. Rule out health causes with your vet first, then look at box size, cleanliness, entry height, and placement.