The space-fit planner answers one question before you order anything: will it fit on that floor? Give it the spot you have in mind and the footprint of each item from its listing, and it finds a layout, draws it to scale and flags a litter box that is too short for your cat.
Apartment Cats earns a commission when you buy through the Amazon links on this page, at no cost to you. Picks are made on published specs, never on commission. How this works
The planner needs JavaScript to run. Without it, multiply the width by the depth of the spot and of each item, and compare the totals; then check the litter box against 1.5 times your cat’s length.
What to buy for this layout
Cards follow the items in your plan; every one comes from a guide we have published. Litter boxes are marked against 1.5 times your cat.
IRIS USA XL Open-Top with Shield
- What it is
- An open-top pan by IRIS with a shield on three sides, 30.2 by 20 in (77 by 51 cm) on the outside.
- Why it fits
- On the 1.5 times rule its length suits a cat to about 20 in (51 cm); type 30.2 by 20 into the litter box row to see it in your spot.
- Skip if
- A senior cat needs a step you know is low; IRIS does not publish one.
Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.Feandrea 37.8-inch (96 cm) Cat Tree
- What it is
- Standing 37.8 in (96 cm), it stacks a basket, a two-door cave and a top perch over an 18.9 in (48 cm) square base.
- Why it fits
- The square-based tree over 3 ft (91 cm) that our small cat tree guide picks; enter 18.9 by 18.9 in (48 by 48 cm) to test it here.
- Skip if
- Nothing may be fixed to your wall: it relies on the anti-tip kit in the box.
Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.KONELCARE 50 in (127 cm) Tall Cat Scratching Post
- What it is
- Sisal rope over a 50 in (127 cm) post, set in solid wood that measures 21.6 in (55 cm) each way; 36 lb, says the maker.
- Why it fits
- Room for a full upright stretch, since no post in our scratching post guide is taller. Try 21.6 by 21.6 in the post row.
- Skip if
- The spot is narrower than 22 in (56 cm); the MidWest further down stands on about 19 in (48 cm).
Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.PETLIBRO Granary Automatic Feeder 3L
- What it is
- A 3 L automatic feeder for dry food, run from buttons with no Wi-Fi, 7.5 in (19 cm) square and 11 in (28 cm) tall.
- Why it fits
- The top pick of our automatic feeder guide, on a base small enough for a narrow shelf or a corner of the counter.
- Skip if
- Your cat eats wet food, since it takes dry food only.
Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.PETLIBRO Dockstream 2 Smart Cordless Fountain
- What it is
- A 3 L cordless fountain by PETLIBRO, 9.6 by 7.8 in (24 by 20 cm) and 7.7 in (20 cm) tall, with its motor in the base.
- Why it fits
- With no cord to an outlet it can go wherever the plan has room; it is the top pick of our cordless fountain guide.
- Skip if
- Every inch counts: the oneisall at the end of this list is listed at 7 by 7 in (18 by 18 cm).
Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.KittyGoHere Senior Cat Litter Box, Jumbo
- What it is
- Its way in is 3 in (7.6 cm) high (5 in, 13 cm, with the gate on), and the listing gives 28 by 22 in (71 by 56 cm).
- Why it fits
- For an older cat in a tight spot: a published step, on a footprint 2.2 in (5.6 cm) shorter than the IRIS by the listing.
- Skip if
- You need the maker’s own measurements; this size comes from Amazon’s listing.
Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.Yaheetech 23.5 in (60 cm) Small Cat Tree
- What it is
- A 23.5 in (60 cm) tree with a condo and a top perch, on a base of 16 by 16 in (41 by 41 cm).
- Why it fits
- For the tightest corner: the base is an inch smaller each way, though the top perch reaches 4.5 in (11 cm) past it.
- Skip if
- You want a perch over 3 ft (91 cm); the maker recommends this one for small cats.
Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.MidWest Feline Nuvo Grand Forte
- What it is
- Faux fur and sisal; MidWest says it stands over 3 ft (91 cm), and Amazon’s listing puts it at 41 in (104 cm), with a base 19 in (48 cm) on each side.
- Why it fits
- A tall post that needs less floor than the KONELCARE does.
- Skip if
- Exact dimensions from the maker matter to you; MidWest gives none.
Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.Van Ness High Sides Giant
- What it is
- Van Ness’s high-sided pan takes 21.25 in (54 cm) of length and 17.63 in (45 cm) of depth, and stands 9.25 in (23 cm).
- Why it fits
- The smallest footprint of the boxes here, fine for cats of 14 in (36 cm) or less from nose to tail base.
- Skip if
- A longer cat: past 14 in (36 cm), the 1.5 times rule asks for more box.
Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.oneisall 2.2L Cordless Cat Water Fountain PW13
- What it is
- A 2.2 L cordless fountain, 7 by 7 in (18 by 18 cm) by the listing.
- Why it fits
- The smallest footprint in our cordless fountain guide, for a spot with little room left.
- Skip if
- You want the maker’s own dimensions; its page gives only the box size.
Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.How the space-fit planner works
It lines items up in rows along the wall, the way most people push furniture into a corner, and turns each one either way to find a fit. It tries a few orders, largest first among them, and draws the first layout where everything lands inside the spot. When nothing works, it tells you whether the floor area is short or only the shapes are wrong, and draws the closest attempt.
Treat a green result as a first pass, not a promise. The planner sees rectangles. It does not know where a door swings, how far a baseboard sticks out, or that a cat needs room in front of a box entry to turn around, and no source we found gives a number for that last one. Leave a margin, and measure the real spot at floor level.
The two guideline checks
- Litter box length. Each box is held against 1.5 times your cat’s nose-to-tail-base length, the AAFP and ISFM minimum. AAHA measures to the tail tip, which asks for more.
- Food and water in the same spot. If a box shares the spot with a feeder, fountain or bowls, the planner warns you. Veterinary guidelines keep them apart but set no distance.
It also points out two boxes placed side by side, because the AAFP and ISFM count those as one box, not two.
About the example values
The planner opens with an example so the drawing has something to show. The litter box, 19.5 x 15.25 in (50 x 39 cm), is the size the American Veterinary Society of Animal Behavior gives for a common covered box sold as “large”. Against an 18 in (46 cm) cat it comes up 7.5 in (19 cm) short of the 27 in (69 cm) minimum. The spot, the cat tree and the cat are invented round numbers; type over all of them.
Sources
- AAFP and ISFM, Guidelines for Diagnosing and Solving House-Soiling Behavior in Cats, 2014. Read Oct 16, 2026.
- AAHA and AAFP, 2021 Feline Life Stage Guidelines: general litter box considerations. Read Oct 16, 2026.
- American Veterinary Society of Animal Behavior, What does the science say about cats and covered litter boxes? Read Oct 16, 2026.
- Cornell Feline Health Center, Feline behavior problems: house soiling. Read Oct 16, 2026.
Related: litter box sizes and styles, cat trees and scratchers and water fountains.