Best Cat Litter Boxes for Multiple Cats
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Quick answer. For several cats, our top pick is the BlissBlaze XXXXL Stainless Steel Litter Box with Lid. At 28 x 20 x 17 inches it has the largest listed footprint of the five large boxes here, its title says Multi-Cats, and it comes with a scoop. The listing does not state a capacity or how many cats it holds. Cornell’s house-soiling guidance says to provide as many boxes as there are cats, plus one, so three cats need four boxes. Check the current price on Amazon before you buy.
This guide uses the listing data from two research files: the small-apartment litter box list and the high-sided list. Five boxes have footprints large enough to show as product cards. The smaller boxes from the first list are covered in a short section, with the reasons they are not the first pick.
How we chose
A box for several cats has to give each cat room to turn, dig and leave, and it has to be easy to clean four or more times a week. We compared the boxes on these points, using only the listing data we captured on 2026-10-17:
- Footprint (length and width), because floor space is the main limit for more than one box.
- Wall height and entry style. Cornell’s guidance says larger cats need bigger boxes, and kittens and elderly cats need boxes with low sides.
- Enclosed or open, and whether a lid is included.
- Weight of the box, because you lift it to clean under it.
- Listed capacity and any multi-cat wording.
None of the listings gives a cat count for its box. Where a seller says a box suits multiple cats, we label that as a listing claim. Where two listing figures disagree, we show both.
Comparison table (as stated on each listing, checked 2026-10-17)
| Product | Footprint L x W (in) | Height (in) | Weight (lb) | Enclosed or open | Capacity or interior stated | Multi-cat wording |
|---|---|---|---|---|---|---|
| BlissBlaze XXXXL, with lid | 28 x 20 | 17 | 11.02 | Enclosed with lid | Not stated | Title says Multi-Cats |
| FZGhome XL, flip lid | 23.62 x 15.75 | 15.35 | 7.63 | Enclosed, flip lid | 30L+ (listing bullet) | Not stated |
| OneBug XL, high-sided | 22.83 x 14.96 (product); 22.95 x 14.80 (interior text) | 10.24 (product); 10.04 (interior text) | 5.47 | Not stated in captured data | Interior 22.95 x 14.80 x 10.04 (listing text) | Bullet names multi-cat use (listing claim) |
| Amazon Basics Large, open top | 19 x 15 | 11.75 | 1.95 | Open top | Not stated | Not stated |
| IRIS USA Large, high sided | 19 x 15 | 11.75 | 1.96 | Open top | Not stated | Not stated |
Worked example: floor space for four boxes
Three cats need four boxes. Four BlissBlaze boxes at 28 x 20 inches each take 560 square inches apiece, or 2,240 square inches in total, about 15.6 square feet. Four Amazon Basics Large boxes at 19 x 15 inches take 285 square inches apiece, or 1,140 square inches in total, about 7.9 square feet. These numbers are plain multiplication of listed footprints, not listing claims.
Cornell also recommends placing multiple boxes in different areas of the house. So the four boxes do not all need to sit side by side in one spot. Measure the rooms you plan to use, then add up the footprints of the boxes you put in each room.
The five large boxes
1. BlissBlaze XXXXL Stainless Steel Litter Box with Lid (top pick)
Specs (from the listing, checked 2026-10-17): dimensions 28 x 20 x 17 inches; weight 11.02 pounds; stainless steel and enclosed with a lid (both from the title); scoop included (title); built-in scratching pad (listing bullet); model XM-B1. The listing does not state a capacity, an interior size or an entry height.
Pros: the largest footprint of the five; the title names multi-cats; the scoop is included; the listing describes a built-in scratching pad; the listing says it is sized for big cats such as Maine Coon (a listing claim we did not verify). Cons: it is enclosed and 17 inches tall, so check the entry before you buy; at 11.02 lb it is the heaviest box in this group to lift for cleaning; the listing gives no cat count.
Best for: several large adult cats where floor space matters most. Skip if: you need a box you can lift easily, or you need a stated capacity, because the listing does not give one.
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2. FZGhome Stainless Steel Litter Box with Flip Lid, XL
Specs (from the listing, checked 2026-10-17): dimensions 23.62 x 15.75 x 15.35 inches; weight 7.63 pounds; stainless steel (title); enclosed with a flip lid; capacity 30L+ (listing bullet); model T166. The listing says it comes with a handle, mat, pedal and scoop. It claims high sides and an overlapping structure help prevent leaks (a claim we did not verify).
Pros: the only box here with a stated capacity (30L+); enclosed with a lid for privacy; accessories included; at 7.63 lb it is about 3.4 lb lighter than the BlissBlaze. Cons: its footprint is about two-thirds of the BlissBlaze’s; the title describes a top entry design, and the listing does not give entry dimensions; the listing gives no cat count.
Best for: a multi-cat home that wants an enclosed box with a stated capacity and a lighter weight. Skip if: you want the most floor space, or you want an open top.
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3. OneBug High-Sided Stainless Steel XL Cat Litter Box
Specs (from the listing, checked 2026-10-17): product dimensions 22.83 x 14.96 x 10.24 inches; interior 22.95 x 14.80 x 10.04 inches (listing text); weight 5.47 pounds; stainless steel (title); model XC-MSP-T181-Gray. The listing says the product and interior measurements may differ by 0.1 to 0.3 inch from manual measurement. It also lists a built-in anti-tracking step (detail not captured).
Pros: the bullet names multi-cat use (a listing claim); the interior size is stated; stainless steel; lighter than the BlissBlaze and FZGhome. Cons: its walls are 10.04 inches, lower than the enclosed boxes; the style (open or enclosed) is not stated in the captured data; the two sets of dimensions differ, as noted above; the listing gives no cat count.
Best for: a stainless box with a stated interior size and a multi-cat claim, where you want a lower wall. Skip if: you need tall walls or an enclosed box.
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4. Amazon Basics Large Cat Litter Box with High Sides, Open Top
Specs (from the listing, checked 2026-10-17): dimensions 19 x 15 x 11.75 inches; weight 1.95 pounds; BPA-free and recyclable plastic (listing bullet); open top; scoop with onboard storage; lowered front for entry (listing bullet). The title and a bullet say high sides, and the same listing says the front is lowered. Both are shown as stated. The listing says it suits older and large cats (a listing claim).
Pros: light at 1.95 lb; open top for easy monitoring (listing claim); scoop with storage; a lowered front for entry. Cons: a smaller floor than the BlissBlaze or FZGhome; the “high sides” wording and the lowered front do not match, so check the listing; the listing gives no capacity or cat count.
Best for: an open-top box with an easy entry and a plain plastic build, for cats who are older or large. Skip if: you need an enclosed box or the most floor space per cat.
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5. IRIS USA High Sided Cat Litter Box, Large, Scatter Shield
Specs (from the listing, checked 2026-10-17): dimensions 19 x 15 x 11.75 inches; weight 1.96 pounds; open top; black; model 500452; manufacturer IRIS USA. The title says Scatter Shield. The listing says it offers cats plenty of room and quick access (a listing claim). The captured data does not state wall height, material or capacity.
Pros: the same footprint as the Amazon Basics box; open top; the listing states its dimensions in two places, and they agree. Cons: no wall height, material or capacity in the captured data; no multi-cat wording.
Best for: a plain open-top box with a 19 x 15 inch footprint. Skip if: you need a stated wall height or an enclosed box.
View on Amazon (affiliate link)
Smaller boxes from the small-apartment list
These boxes are not the first pick for several adult cats. Their listings describe kittens, small cats or small pets, and their footprints are smaller than the five above.
- Bsemax, with lid (17.4 x 13.5 x 8.5 inches): the listing describes kittens, newborn cats and small pets.
- BIKOZI enclosed, dual entry (17.3 x 13.7 x 14.9 or 17.5 x 13.5 x 14.7 inches): the listing gives two sizes and describes small cats and kittens.
- IRIS USA Small, high sided (17.38 x 13.44 x 10.56 inches): the title says kittens and small cats.
- TENTIZON, open top with high-side lid (17.3 x 13.4 x 7.8 inches): the listing gives a cat weight range of 3 to 14 lb per cat and says it suits kittens and medium cats.
- OneBug Small (15.55 x 11.61 x 3.94 inches) and Amibud Low Entry (15.75 x 11.81 x 2.76 inches): both are described for kittens, small cats and small pets.
Listing conflict we did not rank: Marchul enclosed box. Its dimension statements disagree: the details table gives 16.54 x 5.31 x 20.47 inches, the overview gives 20 x 16.2 x 15 inches, and a bullet gives 38 x 41 x 51 cm. A bullet also claims it fits 12 pound cats, which we did not verify. Check the listing before you consider it.
If your cats share a small apartment, the boxes above may compete with other furniture for floor space. Our litter box guide for small apartments covers the smaller footprints in more detail. If you want fewer manual steps for cleaning, see our self-cleaning litter box guide. For vertical space elsewhere in the same home, see our cat trees for small apartments guide.
Mistakes to avoid
- Miscounting the boxes. Cornell’s guidance is cats plus one, so two cats need three boxes and three cats need four.
- Putting every box in one spot. Cornell recommends multiple locations so cats have more options.
- Reading “Multi-Cats” in a title as a capacity. Only the FZGhome listing states a capacity, and none of the listings gives a cat count.
- Using a small box for several adult cats. The footprints of the small boxes are 15.55 x 11.61 to 17.5 x 13.5 inches.
- Trusting the size wording over the numbers. The Amibud title says Small and its overview says Medium. Check the listed dimensions.
Who should skip this list
Skip this list if you need a stated cat count for each box, because none of the listings gives one. Skip it also if one of your cats has trouble getting over a high side. The listings describe entry styles, but they do not say how a box suits a cat with a mobility or health problem. For health questions, such as urinary issues, ask your vet. This guide does not give health advice.
FAQ
How many litter boxes do several cats need?
Cornell Feline Health Center’s house-soiling guidance says to provide as many boxes as there are cats in the house, plus one. Three cats need four boxes.
Do the boxes all need to be in one room?
No. The same guidance says to place multiple boxes in multiple locations, so each cat has more options.
Which box in this list has the most floor space?
The BlissBlaze XXXXL, at 28 x 20 inches, according to its listing. Its footprint of 560 square inches is larger than the FZGhome, the OneBug and the 19 x 15 inch boxes.
Does a listing say how many cats a box holds?
None of the five large boxes gives a cat count. The FZGhome listing gives a capacity of 30L+. The BlissBlaze title says Multi-Cats, and the OneBug bullet names multi-cat use. Both are listing claims, not measured limits.
Can I use a small box for several adult cats?
The small boxes from our small-apartment list have footprints from 15.55 x 11.61 inches to 17.5 x 13.5 inches, and their listings describe kittens, small cats or small pets. For several adult cats, choose one of the larger boxes in this guide.
Sources
- Cornell Feline Health Center, Feline Behavior Problems: House Soiling. Cited for the cats-plus-one box count, the advice to place multiple boxes in multiple locations, and the note that larger cats need bigger boxes while kittens and elderly cats need low sides.
- Product facts: the Amazon listing data for each box, checked 2026-10-17. Specs are as stated by the seller. We did not measure them.
