As an Amazon Associate I earn from qualifying purchases.
Your lightest cat picks the automatic litter box
Every automatic litter box relies on sensors to know when a cat is inside. Most are rated for a minimum weight. On the listings here it runs from 1 to 3.5 lb. Two makers also say 6 months or older, and the two PetSafe boxes give no weight minimum at all. The "weeks without emptying" claim is the other catch. Where a maker says, it is for one cat. With three cats, the Litter-Robot 4's week becomes about 2.3 days. Start with your lightest cat and your cat count.
Automatic litter box fit checker
An estimate from the numbers on each listing and maker page. Days between emptying is the maker's claim divided by your cat count. Where the maker does not say how many cats the claim assumes, we treat it as one cat. Leave room around the box too: Whisker says the Litter-Robot 4 must not touch a wall.
Check which boxes fit your cats See the 7 picks
- Whisker Litter-Robot 43 lb
- PETKIT PuraMax 23.3 lb
- Neakasa M1 Plus3.3 lb
- CATLINK Young Version3.5 lb
- Casa Leo Leo's Loo Too1 lb
Guides
Start here
- The 7 best automatic litter boxes, sorted by the cats they fit
Seven self-cleaning litter boxes from Whisker, PETKIT, Neakasa, CATLINK, Casa Leo and PetSafe, compared by cat weight range, cat count, drawer days, litter and size.
- Which automatic litter box fits your cats?
Enter your cat count, lightest and heaviest cat, litter and space. See which automatic litter boxes fit and about how often you would empty each.
Fit questions
- Minimum cat weight: why your smallest cat matters most
Most automatic litter boxes rate a minimum cat weight of 1 to 3.5 lb, and some say 6 months or older. What that means for kittens and small cats.
- How often you will really empty the drawer
Automatic litter box drawer claims like 15 or 30 days usually assume one cat. How often you would empty each pick with two, three or four cats.
- Which litter works in which automatic box
Which litter each automatic litter box takes, which ones need the maker's own trays or bags, and why pellets and paper do not work in sifting boxes.
- Will it fit the spot, and will it fit the cat?
Automatic litter boxes here run from 6.2 to 31 inches tall. Footprints, weights, wall and carpet rules, and why big cats need more than the entry size.
Living with one
- How many litter boxes you need, even with an automatic one
Vet groups suggest one litter box per cat plus one. How that applies when one of them is automatic, and why a backup box helps.
- What an automatic box stops showing you
Scooping shows you how much your cat pees and poops. An automatic box hides that. The urinary warning signs vets list, and how app data can help.