How Often Should You Change Cat Litter?

One of the least glamorous parts of being a pet parent is dealing with the poo and wee. It doesn’t really matter whether you have a cat, a dog, a rabbit or a hamster, at some point, you’re going to need to be responsible for keeping their space clean and free from any suspicious messes.

And for cat owners, especially those with indoor cats, a huge part of that is keeping on top of the litter tray. Your cat relies on their litter box every single day, so cleaning it can’t be an “I’ll do it when I feel like it” job. Our cats have very specific standards – and rightly so – and if their litter box isn’t clean, they may decide to take their business elsewhere. And that’s the last thing anyone needs.

Keeping your cat’s litter tray clean isn’t just for your cat’s sake either. It’ll also protect your own home from odours you’d rather keep at bay. Plus, a regular cat litter cleaning routine can help you spot changes in your cat’s health like any irregular bowel movements or possible urinary issues.

So, if you’ve ever wondered how often you should change cat litter, how often to scoop it, when to fully empty the tray and whether different litter types need different routines, we’ve pulled together this guide to help keep your cat’s litter box clean and cat-approved.

For one healthy adult cat using clumping cat litter, scoop the tray at least once a day and do a full litter change every two to four weeks. Non-clumping litter usually needs changing completely every few days, while crystal litter can often last around three to four weeks for one cat. If you have more than one cat using the tray, you’ll need to shorten those timings.

When we say change cat litter, we mean completely emptying out all the old litter, washing and drying the tray then refilling it with fresh litter to the right depth. Topping up is helpful between cleans, but it doesn’t replace a proper change. Kittens, senior cats or cats who wee more often due to health conditions may need more frequent changes, so let your cat’s habits and the state of the litter guide you.

Daily scooping really doesn’t take much effort or time and it’s something you don’t want to skip. What we mean by “scooping” is simply removing clumps and solids from their litter tray once a day. It only takes a minute, but it helps keep smells under control and makes the tray much more inviting for your cat. Plus, it’s a good chance for you to take a quick look for anything unusual, like blood, mucus or diarrhoea.

In multi-cat homes, once a day may not be enough, because more cats means more litter tray traffic. Aim to scoop two to three times a day if you can, especially in the morning and evening when cats often use the tray. And because you’ll be doing the job more often, it helps to make the setup as easy as possible by having a sturdy litter scoop with properly sized slots to speed things up and a litter mat in front of the box to help catch those pesky loose granules.

The type of cat litter you use plays a big part in how often you’ll need to change it. For example, some litters are designed to lock away moisture and odour for longer while others need replacing much more often to stop the tray becoming damp and smelly.

And before we get into the different types, it’s also worth saying that no litter can do all the work for you. Scented litter may sound helpful, especially if you’re trying to keep smells under control, but it doesn’t replace regular scooping and cleaning. Some cats also dislike strong fragrances, so a heavily perfumed litter may put them off using the tray altogether. And if you’re switching to a new litter type, introduce it gradually where possible, because cats are not always huge fans of sudden changes to their toilet setup.

Clumping clay litter is one of the most popular cat litter types, mainly because it makes daily scooping much easier. It usually looks like small sandy or gravel-like granules and is designed to form firm clumps when it comes into contact with urine or faeces so you can remove the used sections without emptying the whole tray every time.

• How often to scoop: At least once a day for one cat.
• How often to fully change it: Usually every two to four weeks for one cat.
• For multi-cat homes: Every one to two weeks if two cats are sharing one litter box.
• Main benefit: It’s convenient, controls odour well when scooped properly and wastes less clean litter.
• Downside: Older clumping litter can start to break apart, look grey, smell stale and even feel dusty. If yours looks like this, it means it’s time for a full change.
• Tip: A litter depth of around six to seven centimetres in a suitably deep tray can help clumps form more cleanly.

Non-clumping clay litter looks similar to clumping litter, but it works differently because instead of forming neat clumps, it absorbs moisture into the granules, which means urine can spread through the tray and make the whole thing feel heavy, damp and ready for changing much sooner.

• How often to scoop: Remove faeces every day.
• How often to fully change it: Every few days for one cat, often around twice a week.
• For multi-cat homes: You may need to change it daily or every other day, especially if the tray starts smelling strongly of ammonia.
• Main benefit: It’s usually affordable, easy to find and some cats like the familiar texture.
• Downside: Wet patches can’t be separated as easily, so the whole tray needs refreshing more often.
• Tip: Stir it lightly each day to check for soggy or heavy sections, then empty and wash the tray once the base feels damp.

Crystal cat litter is made from silica gel granules which usually look like small clear, white or lightly coloured crystals. It’s designed to absorb moisture and lock away odour, making it a popular option for owners who want something that can last a little longer between full changes.

• How often to scoop: Scoop solids as soon as possible.
• How often to fully change it: Around every two to four weeks for one cat.
• For multi-cat homes: This may be closer to every two to three weeks, depending on how often the tray is used.
• Main benefit: It can last longer than many other litter types and often controls smell well.
• Downside: Some cats don’t like the feel of the crystals under their paws.
• Tip: Stir the crystals daily to help moisture spread evenly and still wash the tray at every full change because urine residue can build up underneath even if the crystals look dry.

Wood, pine and other plant-based litters usually come as pellets or softer granules. Many wood pellets break down into sawdust when wet, which can then be sifted out. They often have a natural woody scent too which can help with odour control without having to rely on strong, artificial perfumes.

• How often to scoop: Remove solids and sift wet sawdust daily.
• How often to fully change it: Usually around once a week for one cat.
• For multi-cat homes: Check every two to three days and change sooner if the tray feels heavy or smellier than usual.
• Main benefit: Often lighter, plant-based and a good alternative for owners who would rather avoid clay litter.
• Downside: It can track around the tray, especially once pellets break down into sawdust.
• Tip: A litter mat can help catch loose sawdust and pellets before your cat manages to scatter them across the house like tiny confetti.

Recycled paper litter is usually made from compressed paper and comes as soft pellets or small pieces. It’s often low-dust or dust-free, which can make it a good option for kittens, cats recovering from surgery, cats with sensitive paws or cats with respiratory issues.

• How often to scoop: Remove faeces promptly.
• How often to fully change it: Usually every three to four days for one cat.
• In warm weather or multi-cat homes: This may need to be shortened to every one to three days.
• Main benefit: It’s soft, lightweight and usually kinder on sensitive paws than some harder litters.
• Downside: It normally has weaker odour control than clumping or crystal litter.
• Tip: Paper pellets can look dry on top while hiding dampness underneath, so lift a corner with your scoop to check what’s going on below the surface.

As well as the type of litter in question, another reason why answering “how often should you change your cat litter” isn’t as straight forward as you might think, because it’s also dependent on how many cats you have in your home. More cats means more toilet trips, more digging and sadly, more odour. It’s thought that a good rule to follow is one litter box per cat, plus one extra. So, if you have two cats, aim for three litter trays where possible.

This helps reduce competition and stress, especially if one cat is a little bossier or more private about their bathroom habits. Cats don’t always love sharing - they’re independent creatures after all - and if a tray feels too busy or too close to another cat, they may look for somewhere else to go.

And as you can expect, in multi-cat homes, litter trays usually need scooping more often and full litter changes will need to happen sooner too. Even with enough boxes, a two-cat home may need full changes every one to two weeks, depending on the litter type, how often each tray is used and what your cats prefer. Older cats, larger breeds and cats with health issues will also need a bit more thought as their toilet habits will differ too.

Scooping is something to do daily but deep cleaning is where the litter tray gets a proper reset. That means emptying out all the old litter, washing the tray, drying it fully and refilling it with fresh litter to the right depth. How often you deep clean your cat’s litter box depends a little on the litter type and how many cats are using it, but once a week is a good routine to get into.

Here’s a simple way to do it:

1. Wear gloves and empty the tray: Tip all the old litter into a bin bag, seal it properly and dispose of it with your household waste unless your litter packaging says otherwise.
   
   
2. Wash the litter box: Use warm water and a mild, unscented soap to scrub the tray, paying attention to the corners and any areas where damp litter tends to stick.
   
   
3. Rinse and dry fully: Rinse away any soap residue, then let the tray dry completely before adding fresh litter. Damp trays can make clean litter clump or smell sooner than it should.

When giving your cat’s tray a deep clean, always be sure to avoid harsh cleaning products like bleach and ammonia-based cleaners as these can irritate cats, and some smells may even put them off using the tray completely. Unscented cleaning products are usually a safer bet for sensitive feline noses.

As you’re cleaning, it can also help to inspect the tray to make sure it’s not ready for replacing. Sometimes, older plastic litter boxes can develop tiny scratches where bacteria and smells hang around and over time, larger cracks may appear. This is usually a sign that a new cat litter tray is warranted.

It won’t be your first thought, but sometimes a dirty litter box doesn’t just become a smell problem. If old litter is left too long, bacteria can build up and the tray can become unpleasant for your cat to use which, in some cases, may contribute to stress, irritation or hygiene issues for your feline friend. It’s why regular litter box cleaning is essential, so they have somewhere safe and clean to go.

Signs your cat litter may need changing more often include:

• Lingering smells: If you can still smell urine or faeces after scooping, the litter is probably past its best.
• Broken clumps or wet patches: Clumps that fall apart or damp areas on the base of the tray are a good sign it needs a full change.
• Litter sticking to paws: Crystals, pellets or damp litter sticking to your cat’s paws can mean the tray is too wet or saturated.
• Extra scratching at the tray: If your cat is digging at the edges or seems unsure about stepping in, they may not be happy with the state of their litter box.

Cats can be very clear when their toilet is not up to standard, and sometimes that means accidents around the house. Wee just outside the tray, repeated visits with very little coming out or avoiding the litter box altogether can point to stress, discomfort or an underlying health issue. Some cats, especially those with conditions that make them wee more often, may also need more frequent litter changes.

If your cat suddenly starts straining, passing blood, crying in the tray or avoiding a clean litter box, we recommend contacting your vet too. Litter box problems can be behavioural, but they can also be a sign your cat needs medical help.

As tempting as it can be to overperfume a litter tray with scented products and sprays, the best way to keep odour under control is by scooping lumps and messes daily and giving deep cleans every week or so. It can also help to keep the litter box somewhere ventilated, like near an open window, rather than tucked into a cramped cupboard where smells can build up. It’s also important to keep the litter at the right depth and avoid placing the tray next to radiators, as heat has a special talent for making litter tray smells even stronger.

Most used cat litter should be bagged and placed in your general household waste. Even if a litter claims to be flushable, we don’t suggest flushing it as it’s not difficult for the dust and pellets to block pipes. There’s also a small chance it can introduce parasites such as Toxoplasma gondii into water systems.

Some biodegradable cat litters may be suitable for certain food-free composting or bio waste schemes, but only if they’re free from faeces and your local rules allow it. Meanwhile, clay litter and crystal litter should always go in the bin.

Pregnant women or anyone with a weakened immune system should avoid handling soiled litter where possible, or wear gloves and wash their hands thoroughly afterwards. A small lidded pedal bin near the tray can make daily disposal much easier and safer.

How often you need to clean your cat’s litter box is partly down to the box itself, because a cramped tray is going to get messy much faster. Ideally, your cat’s litter tray should be at least one and a half times the length of your cat with sides high enough to contain enthusiastic digging but a low enough entry point for kittens or senior cats to get in and out with ease.

You’ll also want something with a smooth surface and rounded corners, not only for easier cleaning but also for your cat’s safety. Self-cleaning litter boxes can reduce some of the daily work, but they still need full litter changes and deep cleans after a couple of weeks. Pair the right tray with a sturdy scoop suited to your litter type and a well-fitted litter mat, and the whole routine becomes much less of a chore.

So, how often should you change cat litter? For most single-cat homes, scooping once a day is the minimum with a full litter change anywhere from every few days to every few weeks depending on the type of litter you use. Clumping litter and crystal litter can usually last longer, while non-clumping, paper and some plant-based litters often need changing more often. The main thing is to pay attention to the tray in front of you, because it’ll tell you exactly what you need to know based on how it looks and how it smells.

We won’t lie and say cleaning out a litter tray is the best part of owning a cat, but we can promise that having the right setup makes it a whole lot easier. A good-quality litter tray, a cat litter that works for both you and your feline friend, a sturdy scoop and a mat to catch the mess can make the whole routine quicker and far less annoying. And if you need some, or all of that, we’ve got all the cat essentials you’ll need here at WOOOF.

Tips on How to Get Rid of Cat Pee Smell

How to Harness Train a Cat: Step by Step Guide for Confident Walks

How to Keep Your Cat Cool