# Best Cat Litter 2026: Why the Litre Tells You Nothing Source: https://www.ranked10.co.uk/pet-supplies/best-cat-litter Published: 2026-09-11 | Updated: 2026-09-11 | Prices checked on Amazon UK on 2026-09-11 Cat litter is sold by the litre and used by the kilo, and those two numbers are not the same kind of number. Here is the proof from this ranking: a 30-litre bag of recycled paper weighs 10kg, and a 30-litre bag of wood pellets weighs 14.5kg. Same number on the bag, same shelf space, 45 per cent more litter in one of them. Among the 20-litre bags the gap is wider still — 9.5kg of white clay against 16.7kg of clumping clay — which means one litre of litter can weigh 0.48kg or 0.84kg depending on what it is made of. Once you convert, price per kilo separates the field properly. The cheapest litter here costs £0.83 per kilo and the dearest £1.87, so the same job costs 2.25 times more at the top. The number one best seller — Catsan Hygiene Plus 20L, the best-selling product in Amazon's entire pet supplies category with 33,577 ratings at 4.6 stars — works out at £1.58 per kilo, which is 90 per cent dearer than the cheapest bag here. Meanwhile the best-rated litter in this ranking is that same brand's 10-litre bag at 4.7 stars with only 1 per cent one-star ratings, and it costs a penny per kilo more than the 20-litre version. The data itself is part of the story. One listing's title says 4L capacity while its capacity field says 4 Kilograms, and a reviewer admits ordering it expecting the big bag: I missed the 4L capacity and thought I was getting the big bag. That is the mistake this page exists to prevent. Read the weight, ignore the litre, and compare the price per kilo — with one honest caveat, that a kilo of clay absorbs more than a kilo of paper, so the cheapest per kilo is not automatically the cheapest per month. Everything on this page comes from the Amazon listings, collected on 11 September 2026. ## The ranking ### 1. Catsan Hygiene Plus Cat Litter White, 20L Non-Clumping - Price: £15.00 | Amazon rating: 4.6 from 33,577 ratings - Full review: https://www.ranked10.co.uk/pet-supplies/best-cat-litter/catsan-hygiene-plus-20l - Buy on Amazon: https://www.amazon.co.uk/dp/B001MZV3OO?tag=ranked10-21 The number one best seller in Amazon's entire pet supplies category: 20 litres and 9.5kg for £15, which is £1.58 per kilo. The best-selling product in Amazon's pet supplies category — not just in cat litter, in everything — with 33,577 ratings at 4.6 stars, 81 per cent of them five-star and 3 per cent one-star. It costs £15.00 for a 20-litre bag that weighs 9.5kg, which works out at £1.58 per kilo of litter. That last figure is the point of this ranking. A 20-litre bag sounds large, and it is; but litter is sold by volume and used by weight, and the two are only loosely related. This bag holds 0.48kg per litre. The wood pellets below come in a 30-litre bag weighing 14.5kg — the same kind of density in a bigger bag — while the clay litters here run heavier per litre and the recycled paper runs lighter. The result is that price per litre means nothing and price per kilo is the only comparison. What you get is a non-clumping litter of limestone and quartz granules, unscented, with what the listing calls triple odour protection: it locks liquid inside the granule rather than forming clumps to scoop. The reviews are why it sells — I always use Catsan, my cats will not use anything else, the cleanest on the market — and at £1.58/kg it is 90 per cent dearer than the cheapest litter here by weight. That is the price of buying the one everybody trusts. Pros: 33,577 ratings at 4.6 stars: the deepest sample here; Ranked 1st in Cat Litter and 1st in Pet Supplies overall; 81 per cent five-star reviews, 3 per cent one-star; Publishes both its volume and its weight: 20L and 9.5kg; Non-clumping, unscented, 100 per cent natural granules Cons: £1.58 per kilo: 90 per cent dearer than the cheapest litter here; Non-clumping means emptying the tray rather than scooping; £15.00 is the second-highest outlay on this page; 3 per cent of its 33,577 ratings are one-star ### 2. Catsan Hygiene Non-Clumping Cat Litter, 10 Litre, 100 Percent Natural - Price: £8.10 | Amazon rating: 4.7 from 3,858 ratings - Full review: https://www.ranked10.co.uk/pet-supplies/best-cat-litter/catsan-hygiene-10l - Buy on Amazon: https://www.amazon.co.uk/dp/B014PCXKNW?tag=ranked10-21 The best-rated litter in the ranking — 4.7 stars with 1 per cent one-star — at the same price per kilo as the number one best seller. The best-rated litter in this ranking: 4.7 stars from 3,858 ratings with 83 per cent five-star and 1 per cent one-star, the cleanest complaint record here. It is the smaller sibling of the number one best seller above — the same Catsan non-clumping granule in a 10-litre bag weighing 5.1kg, for £8.10. The interesting arithmetic is that this works out at £1.59 per kilo against £1.58 for the 20-litre bag. Choosing the small bag costs a penny per kilo of litter, which makes it the sensible buy if you are trying a litter for the first time or do not have room to store 9.5kg of it. What you give up is the odour-control naming. This listing describes the same behaviour in plain words — it absorbs before odour can develop, and locks liquid into the granule — rather than naming it triple protection. With 1 per cent one-star ratings and buyers reporting great absorbency and minimal smell, it does the same job for the same money per kilo, in a bag half the size. Pros: 4.7 stars: the best rating in this ranking; Only 1 per cent one-star ratings, the cleanest record here; The same £1.59 per kilo as the 20-litre best seller; £8.10: half the outlay of the big bag; Absorbs before odour develops, and locks liquid in the granule Cons: A 10-litre bag holds 5.1kg, so it runs out in half the time; Non-clumping: empty the tray rather than scoop; No named odour technology, unlike its larger sibling; 1 per cent of its 3,858 ratings are one-star ### 3. Biokat's Diamond Care Cat Litter with Activated Carbon and Aloe Vera, 10L - Price: £13.99 | Amazon rating: 4.3 from 24,946 ratings - Full review: https://www.ranked10.co.uk/pet-supplies/best-cat-litter/biokats-diamond-care - Buy on Amazon: https://www.amazon.co.uk/dp/B07CPK4T22?tag=ranked10-21 Activated carbon and aloe vera for £1.62 a kilo — the second-dearest litter here by weight, with 24,946 ratings behind it. A fine-grain clay litter with activated carbon and aloe vera, scented with baby powder, for £13.99. The 10-litre bag weighs 8.64kg, which is £1.62 per kilo — the second-dearest litter in this ranking, behind only the clay multipack at £1.87. It carries 4.3 stars from 24,946 ratings, with 65 per cent five-star and 16 per cent three-star, the highest three-star share here. Its ingredients are why it costs what it does. Activated carbon is a real odour adsorbent rather than a perfume, and aloe vera is there for paws rather than for the litter. The texture is deliberately fine, which is what clumping litters designed for automatic boxes are, and one review here comes from a robot-litter-box owner who finds it brilliant. The 17 x 24.5 x 44cm pack also tells you how much storage a 10-litre bag needs. The reviews are enthusiastic — the best litter I have ever used, smells do not linger — while 16 per cent of three-star ratings is the honest note. A fine, scented litter is a preference, and this is the one to try if you have not decided whether you like one. Pros: 24,946 ratings at 4.3 stars: the second-deepest sample here; Activated carbon for odour, aloe vera for paws; A fine texture that suits automatic litter boxes; Clumping, so clumps lift out rather than the tray being emptied; Buyers describe no lingering smell Cons: £1.62 per kilo: the second dearest here; 16 per cent of its ratings are three-star, the highest middling share; Baby powder scent is not for every cat; 3 per cent of its 24,946 ratings are one-star ### 4. Sanicat Clumping Cat Litter with Marseille Soap Scent, 10L - Price: £7.00 | Amazon rating: 4.4 from 10,537 ratings - Full review: https://www.ranked10.co.uk/pet-supplies/best-cat-litter/sanicat-marseille-10l - Buy on Amazon: https://www.amazon.co.uk/dp/B00EOONP3M?tag=ranked10-21 The cheapest litter in the ranking by weight — £0.83 a kilo — for £7.00 a bag, with 10,537 ratings behind it. The cheapest litter in this ranking by the only measure that compares: £7.00 for a 10-litre bag weighing 8.4kg, which is £0.83 per kilo. That is 90 per cent cheaper per kilo than the number one best seller in the category, and 45 per cent cheaper than the dearest here at £1.87. It is a clumping clay litter with large granules, which the listing says form compact clumps that are easy to lift out — the standard trade against non-clumping litters, which absorb into the granule and need the tray emptied rather than scooped. The scent is Marseille soap and the odour control is described as active oxygen, a chemistry claim rather than a fragrance one, and the reviews bear it out: one buyer calls it no smell, another says it clumps well and reduces the smell. Ten thousand ratings at 4.4 stars is why this sits fourth rather than first. It is the best value on the page by a wide margin, and the most popular litters above it cost up to twice as much per kilo for the same job. Pros: £0.83 per kilo: the cheapest litter in this ranking; £7.00 a bag, the lowest outlay for a full-size bag; 10,537 ratings at 4.4 stars; Large granules that form compact, liftable clumps; Active-oxygen odour control rather than a perfume Cons: 5 per cent of its 10,537 ratings are one-star; Marseille soap scent will not suit every cat; Clumping litter needs topping up as clumps are removed; £1.20 more per bag than the cheapest single bag here ### 5. Sanicat Classic Cat Litter with Aloe Vera, 4L, 7-Day Odour Control - Price: £2.99 | Amazon rating: 4.3 from 10,323 ratings - Full review: https://www.ranked10.co.uk/pet-supplies/best-cat-litter/sanicat-classic-4l - Buy on Amazon: https://www.amazon.co.uk/dp/B08FBS51BM?tag=ranked10-21 A listing that says 4L in its title and 4 Kilograms in its capacity field — and a buyer who admits ordering it by mistake. The best illustration of this category's problem is a listing that contradicts itself. The title says 4L capacity; the capacity field says 4 Kilograms. It weighs 2.7kg, so the field is wrong and the title is nearly right — four litres of clay litter weighs more than four kilos. It costs £2.99, which is £1.11 per kilo, between the value litter at £0.83 and the dearest at £1.87, and it carries 4.3 stars from 10,323 ratings. One of the reviews shows what that inconsistency costs a buyer: I am glad I bought two bags because I missed the 4L capacity and thought I was getting the big bag. That is the whole argument for reading the weight rather than the volume, in one sentence from a customer. The litter itself is straightforward clay with aloe vera and a seven-day odour-control claim — a promise about time, which is unusual in a category whose claims are about smell and texture. At £2.99 it is the cheapest single bag here and the cheapest way to try a brand that has 10,000 ratings behind it. Pros: £2.99: the cheapest single bag in this ranking; 10,323 ratings at 4.3 stars; A seven-day odour-control claim, a promise about time; Aloe vera additive, and a clay granule that absorbs quickly; The cheapest way to try a brand with this much feedback Cons: 4 litres weighs 2.7kg, so this is a small bag; The capacity field says 4 Kilograms: the units contradict; 5 per cent of its 10,323 ratings are one-star; £1.11 a kilo against £0.83 for the best value here ### 6. Breeder's Choice Paper Cat Litter 30L, 99 Percent Recycled - Price: £14.69 | Amazon rating: 4.4 from 9,297 ratings - Full review: https://www.ranked10.co.uk/pet-supplies/best-cat-litter/breeders-choice-30l - Buy on Amazon: https://www.amazon.co.uk/dp/B003XLH3NK?tag=ranked10-21 The same 30 litres as the wood pellets here — but 10kg against 14.5kg, which is 4.5kg less litter for the same shelf space. A 30-litre bag of 99 per cent recycled paper litter for £14.69, weighing 10kg. Put it beside the wood pellets in this ranking and the problem with every litre on this page becomes obvious: those are 30 litres at 14.5kg, these are 30 litres at 10kg. The same shelf space, the same number on the bag, and 4.5kg — nearly a third — less litter inside. Per kilo this works out at £1.47, in the middle of the range from £0.83 to £1.87. Paper is non-clumping and compostable, made in the United Kingdom, and it ranks third in Amazon's cat litter category with 4.4 stars from 9,297 ratings. What buyers like about paper is the weight and the tidiness: it is light to carry, it does not track like clay, and one reviewer says that after using Breeder Celect they could not go back — less odour, nothing sticking to the tray. What you accept is a bigger bag for the same money, because paper absorbs less per kilo than clay: 10kg of paper does not go as far as 10kg of bentonite. Pros: 9,297 ratings at 4.4 stars, and 3rd in the cat litter category; 99 per cent recycled paper, compostable, made in the UK; 10kg for 30 litres: easy to carry and store; Non-clumping and low-tracking compared with clay; Buyers report less odour and nothing sticking to the tray Cons: 10kg for 30 litres is 4.5kg less litter than the pellets; Paper absorbs less per kilo than clay, so it goes less far; Non-clumping: the tray is emptied rather than scooped; 5 per cent of its 9,297 ratings are one-star ### 7. by Amazon Extra White Ultra Clumping Cat Litter, 10L, Unscented - Price: £11.99 | Amazon rating: 4.3 from 4,986 ratings - Full review: https://www.ranked10.co.uk/pet-supplies/best-cat-litter/amazon-extra-white-10l - Buy on Amazon: https://www.amazon.co.uk/dp/B0CTCFWBQC?tag=ranked10-21 Amazon's own clumping litter costs £1.41 a kilo — 70 per cent more by weight than a branded bag at £0.83. Amazon's own-brand clumping litter: £11.99 for a 10-litre bag weighing 8.5kg, which is £1.41 per kilo, with 4.3 stars from 4,986 ratings. Put beside the Sanicat clumping litter above — the same 10 litres, 8.4kg, £7.00 — and the own brand is 70 per cent dearer per kilo than the branded bag. That is worth stating plainly, because the assumption that own brand is cheaper holds in many categories and not here. What the extra buys is the specification: an extra-white clay, which is not only aesthetic — pale litter makes the colour of urine and the presence of blood far easier to notice, which is why many owners choose it. It is unscented and described as ultra clumping, aimed at what the listing calls discerning cats, which in practice means cats that have rejected a scented litter. The reviews add the detail this category rarely mentions: dust. One buyer says it is not super dusty and clumps well enough, another calls it the best clumping litter they have bought. Silica dust is the health consideration with clay litter, and not super dusty is the honest version of that claim. Pros: 4,986 ratings at 4.3 stars; Extra-white clay, which makes changes in urine easier to see; Unscented, for cats that reject scented litter; Ultra clumping, with a fine texture; Buyers mention it is not very dusty Cons: £1.41 per kilo: 70 per cent more than the branded clumping bag; 7 per cent of its 4,986 ratings are one-star; Own brand is not the cheaper option in this category; Unscented means no odour masking: absorption has to do the work ### 8. Ever Clean Multicat Clumping Cat Litter, 20L, Floral - Price: £31.28 | Amazon rating: 4.5 from 4,240 ratings - Full review: https://www.ranked10.co.uk/pet-supplies/best-cat-litter/ever-clean-multicat-20l - Buy on Amazon: https://www.amazon.co.uk/dp/B0DQDBX6TT?tag=ranked10-21 The dearest litter in the ranking at £1.87 a kilo, in a 16.7kg bag — the heaviest 20 litres collected here. The most expensive litter in this ranking by weight: £31.28 for a 20-litre bag weighing 16.7kg, which is £1.87 per kilo — 2.25 times the cheapest litter here and 18 per cent more than the next dearest. It carries 4.5 stars from 4,240 ratings with 74 per cent five-star, and it is a clumping clay litter with a floral scent, sold as a multipack formula for households with more than one cat. The number that surprises people is the weight. Sixteen and a half kilos is a bag you carry in two trips or with a trolley, and it arrives in a box — the pack measures 17 x 24.5 x 44cm. Heavier clay also means more litter per litre: this holds 0.84kg per litre where the paper litter here holds 0.33, so per litre it looks reasonable and per kilo it is the dearest thing on the page. The listing also spends a paragraph explaining that the product was previously called Multiple Cat and that either pack may arrive. That honesty about a rebrand is unusual, and it means an older review of Multiple Cat is a review of this bag. Pros: 4.5 stars from 4,240 ratings, 74 per cent five-star; 0.84kg per litre: the densest litter collected here; A clumping multipack formula for multi-cat households; The listing is honest about its change of name; Ranked 6th in Amazon's cat litter category Cons: £1.87 per kilo: the dearest litter in this ranking; 16.7kg is a two-trip bag; 5 per cent of its 4,240 ratings are one-star; Floral scent will not suit every cat ### 9. Munnie Cat Litter 30L, Biodegradable Wood Pellets, Unscented - Price: £12.99 | Amazon rating: 4.6 from 1,835 ratings - Full review: https://www.ranked10.co.uk/pet-supplies/best-cat-litter/munnie-wood-pellets - Buy on Amazon: https://www.amazon.co.uk/dp/B0DNTLYFTJ?tag=ranked10-21 The heaviest bag in the ranking: 30 litres of wood pellets weighing 14.5kg, at £0.90 a kilo. Thirty litres of recycled wood pellets for £12.99, weighing 14.5kg — the heaviest bag in this ranking and the second cheapest per kilo at £0.90. It carries 4.6 stars from 1,835 ratings with 81 per cent five-star and 3 per cent one-star, which is the joint-best rating here. The material is what makes it interesting. Pellets are sawdust compressed under pressure, so they hold their shape until wet and then break down into sawdust — which is how they absorb liquid without clumping, and why they can be composted. The listing pitches the same product for housetraining kittens and puppies, which is what pellets are widely used for, and the scent is unscented because the wood does the smell work. Beside the paper litter here it makes the density argument concrete: both bags say 30 litres, this one weighs 14.5kg and that one 10kg. Same volume, 45 per cent more litter by weight, and a lower price per kilo. The trade is weight — 14.5kg is not a one-hand carry — and the sawdust as the pellets break down, which some owners find tracks more than clay. Pros: 4.6 stars from 1,835 ratings: joint-best rating here; £0.90 per kilo: the second cheapest litter by weight; 30 litres weighing 14.5kg: the heaviest bag collected here; Recycled wood pellets, biodegradable and unscented; Also used for housetraining kittens and puppies Cons: 14.5kg is a two-hand carry and needs storage space; Pellets break down into sawdust as they absorb; Non-clumping: empty the tray rather than scoop; 1,835 ratings is a quarter of the best seller's sample ### 10. by Amazon Clumping Fine Unscented Cat Litter, 10L - Price: £7.00 | Amazon rating: 4.2 from 1,266 ratings - Full review: https://www.ranked10.co.uk/pet-supplies/best-cat-litter/amazon-clumping-fine-10l - Buy on Amazon: https://www.amazon.co.uk/dp/B0DG933ZKR?tag=ranked10-21 The cheapest litre-for-litre on this page — and the weakest record, with 9 per cent one-star ratings from the smallest sample. The cheapest bag in this ranking by weight alongside the Sanicat: £7.00 for 10 litres weighing 8kg, which is £0.875 per kilo, with 4.2 stars from 1,266 ratings. It is a fine-grain bentonite clay, unscented, described as forming flat clumps that are easy to lift. It also has the weakest record here: 9 per cent of those 1,266 ratings are one-star, the highest rate in the ranking, on the smallest sample. That combination is the reason it sits last despite the price: at £0.875 a kilo the value is real, but 1,266 ratings is a seventh of the best seller's sample, and one in eleven owners giving it one star is a risk you can see coming. The reviews that are positive point at the same thing as the expensive litters: one buyer uses it in a Petpivot automatic litter box and reports it works brilliantly, another has used high-end brands and says they will switch to this. Fine bentonite is what those boxes need, and at this price it is the way to feed one without buying premium litter. Pros: £0.875 per kilo: the joint-cheapest litter by weight here; £7.00 a bag: a low outlay to try a fine bentonite; Unscented, for cats that avoid perfumed litter; Flat clumps that lift out cleanly, per the listing; Buyers use it successfully in automatic litter boxes Cons: 9 per cent of its 1,266 ratings are one-star, the highest rate here; 1,266 ratings: the smallest sample in this ranking; 4.2 stars: the lowest average here; Fine clay tracks more than the paper or pellet litters ## Verdict What we would buy. The Sanicat Clumping at £7.00 for 8.4kg is the value pick: £0.83 per kilo, 10,537 ratings at 4.4 stars and an active-oxygen odour control rather than a perfume. If you want the safest choice, Catsan Hygiene Plus at £15.00 is the best-selling product in the whole pet supplies category, and for a smaller outlay the same brand's 10-litre bag at £8.10 has the best record here at 4.7 stars with 1 per cent one-star ratings. If the bag's weight matters — a 16.7kg bag is hard work — Breeder's Choice in recycled paper is 10kg for 30 litres. And if you have an automatic litter box, the fine clumping litters are what those machines need, from £7.00. What the listings will not tell you. The litre is a volume and litter is used by weight, so convert before comparing: multiply nothing, just read the weight field. Clumping litter is topped up as clumps are removed; non-clumping litter is emptied, which uses more per tray but costs less per bag. White litter is not just cosmetic — it makes changes in urine visible, which is how kidney problems get noticed early. Fine clay tracks and creates dust; paper and pellets track less but absorb less per kilo. And the numbers on this page are the sellers' own, which is why the one listing that contradicts itself is described as such rather than tidied up. Everything here was collected on 11 September 2026.