By Petbuds Team · Cat Care · Large Breed Guide · Australia

How Big a Litter Box Do Maine Coons, Ragdolls and Norwegian Forest Cats Actually Need?

When people think "big cat," Maine Coon is usually the first breed that comes to mind. But across Australian households, plenty of other large breeds run into exactly the same problem — Ragdolls, Norwegian Forest Cats, Savannahs, and even larger-than-average British and American Shorthairs. Standard litter boxes simply don't give them enough room.

Here's a breed-by-breed look at common large cat breeds in Australia, and what they all tend to need from a litter box.

Common large cat breeds in Australia: a size breakdown

Maine Coon

Adult weight 6–10kg, body length up to 100cm+. Currently the most common large breed, with a broad, sturdy frame and a shoulder height noticeably above the average domestic cat.

Ragdoll

Adult weight 4.5–9kg, with males typically on the larger end. Long-bodied with a solid muscle mass, meaning they need real turning room inside the box.

Norwegian Forest Cat

Adult weight 4.5–9kg, muscular build with a thick double coat. When box space is tight, that longer coat is more likely to catch or brush against the sides.

Savannah

Adult weight 5.5–9kg, high energy and strong jumping ability, which means the box's stability and footprint matter just as much as its size.

3 things these breeds all need from a litter box

1. Enough room to turn around

Regardless of breed, a cat needs to enter, turn, dig and eliminate — a full sequence of movements. When space is too tight, cats often end up crouching half in, half out of the box, or avoiding it altogether. That's not stubbornness; it's a mismatch between the box and their actual size.

2. A higher weight capacity

The weight sensor in an automatic litter box is what determines whether a cat is inside. Adult individuals of the breeds above regularly reach 8–9kg or more, so it's worth checking for a clearly stated weight rating rather than a vague "large cat" label.

3. A bigger waste bin

Larger cats naturally produce more waste. If the waste bin is sized for a small cat, "automatic" quietly turns into "semi-automatic," with manual emptying needed every couple of days — which defeats the point.

The same logic applies to multi-cat households

If two or more cats are sharing a litter box, the combined demand on space, weight capacity and bin capacity adds up in a very similar way to owning a single large-breed cat. Either way, the litter box shouldn't be the bottleneck in your home.

The bottom line

Whether your cat is a Maine Coon, a Ragdoll or a Norwegian Forest Cat, the underlying logic is the same: start with the breed's real measurements, then work backwards to the space, weight capacity and bin size the box actually needs. Petbuds Max was built around exactly these large-breed measurements, with a 13.5kg weight capacity that covers the vast majority of the breeds above.