How often you need to change cat litter depends on which type of litter you use, how many cats share the tray, and how thorough your daily routine is. The short version: remove clumps and waste daily, and replace all the litter completely when the smell no longer disappears with the daily cleaning. For clumping litter with one cat, that typically means a full change every two to three weeks, while non-clumping litter and multiple cats require more frequent replacement. Below you'll get a concrete rhythm you can build your everyday routine around.

The most important realisation is that "changing cat litter" covers two different things. One is the daily removal of clumps and waste, where you only scoop out the used litter and add a little new. The other is the full change, where you empty the entire tray, wash it and fill fresh litter in from the bottom. Both are part of the job, and it's the combination of the two that keeps the tray clean and your cat happy to use it.

What does "changing" mean - daily removal versus a full change

The daily removal is what carries you through everyday life. With clumping litter, urine gathers into solid clumps that you easily lift out with a litter scoop, along with the solid waste. If you do this at least once a day, preferably twice, you keep the smell down and avoid the used litter mixing into the clean. Add a little fresh litter so the layer keeps its height, and you effectively have an almost clean tray without having to empty it.

The full change is a different task. Here you empty the entire tray, rinse or wash it and fill new litter in. It's necessary because even the best litter eventually loses its ability to bind moisture and odour, and because fine particles and bacteria collect at the bottom, where the scoop doesn't reach. Exactly how often this needs to happen is precisely what most people are unsure about - and it depends on the factors in the next section.

How often should you change cat litter completely?

If you use clumping litter and have one cat, a full change typically lasts every two to three weeks, provided you remove clumps daily. Clumping litter is effective precisely because you remove the used material on an ongoing basis, so the rest stays clean for longer. Non-clumping litter, on the other hand, needs a full change more often, often around once a week, because the urine spreads throughout the whole layer instead of gathering into clumps you can lift out.

The number of cats shifts the figure noticeably. Two cats sharing the same tray strain the litter more than twice as much, because the tray rarely gets to dry out completely between visits. A good rule of thumb is one tray per cat plus an extra, and with several trays the strain is spread out, so you can get away with changing the individual tray a little less often. Regardless of the number, the best guide is your own nose: if you can smell the tray, even after removing the clumps, it's time for a full change.

Which type of litter you choose therefore has a big impact on the rhythm, and it's worth looking at what suits your particular cat. In cat litter you'll find the litter types we offer, and the clumping Canada Litter is designed for daily removal, where you lift out the clumps and let the rest stay in the tray.

How to clean the tray when you change it

When you do the full change, cleaning the tray itself is just as important as the new litter. Empty the tray completely and rinse it with warm water. Avoid strong cleaning agents with a heavy scent of chlorine or citrus, because cats have a far more sensitive sense of smell than we do, and a sharp chemical scent can make them stay away from the tray. A mild soap and thorough rinsing is plenty, and dry the tray off before you fill in new litter, so it doesn't clump together at the bottom right away.

Fill in a suitable layer, typically around five to seven centimetres, so your cat can dig and cover up as instinct dictates. Too little litter doesn't give room to dig, and too much just gets spilled over the edge. Place the tray in a quiet spot away from the food bowl and water bowl, because few cats like to do their business where they eat their cat meals.

Why does the cat eat or dig in the litter?

Some cat owners notice that the cat tastes the litter or digs extra eagerly, and become worried about whether it's connected to the change frequency. Kittens explore the world with their mouths and may taste anything, including the litter, while they get to know the tray - this usually fades as they get older. Adult cats that suddenly start licking or eating litter, on the other hand, may have an underlying need, and here it's wise to contact a vet rather than guessing at the cause.

The eager digging, on the other hand, is completely normal and a healthy sign. The cat covers up its waste by instinct, and the cleaner and more natural the litter feels under its paws, the more willingly it uses the tray. That's exactly why it pays to keep a steady rhythm with daily removal and regular full changes - a clean tray is the best insurance against the cat starting to find alternative spots around the home.

How much cat litter does a cat use, and where do you throw it away?

A single cat normally uses a couple of kilos of litter a month when you combine daily removal with full changes, but consumption varies with litter type and the number of trays. Clumping litter goes further, because you only remove the clumps and top up a little at a time, while non-clumping litter needs a full change more often and is therefore used up faster. If you have several cats, you can safely multiply and plan your shopping accordingly, so you never run out in the middle of a week.

Used cat litter belongs in the general waste, not the toilet, regardless of what the packaging on some products suggests, as it can clog drains and burden treatment plants. The clumps and used litter are best packed in a bag that is tied shut before it goes in the bin, so the smell is kept in. With a set routine, it all becomes a manageable part of everyday life, and you can supplement with the cat accessories that make daily care easier - from the tray itself to the right equipment for cleaning.

In the end, there isn't one fixed number that suits everyone. Remove clumps and waste daily, keep an eye on the smell, and do the full change when the daily cleaning is no longer enough - every two to three weeks for clumping litter with one cat, more often for non-clumping litter or multiple cats. If you listen to your own nose and your cat's behaviour, you'll quickly find the rhythm that keeps both the tray clean and your cat content.