Best Cat Litter for Odor Control
Litter box smell has two causes: the litter, and how often the box gets cleaned. A good litter traps urine fast and holds it in a tight clump. A good routine gets that clump out before it can smell.
Updated October 27, 2026. Research by The Pet Gear Lab team.
Disclosure: Some links on this site are affiliate links, and we may earn a commission from qualifying purchases. Picks are labeled Research pick because they come from published testing and owner reports. How we pick.
The short answer
Dr. Elsey’s Ultra Unscented Clumping Clay is the best cat litter for odor in most homes: it is unscented, hard clumping and well reviewed by Forbes Vetted and Cats.com testers. For low dust, pick Boxiecat Premium Unscented. For a plant-based litter, pick World’s Best Cat Litter Multiple Cat Unscented. Whatever you choose, scoop daily.
Key facts
- The ASPCA says most cats prefer clumping, unscented litter with a soft, sandy texture.
- Cat Friendly Homes, a site from feline vets, says scented litters can trigger asthma in cats and people.
- The AAHA/AAFP Feline Life Stage Guidelines, the ASPCA and Cornell all advise scooping the litter box at least once a day.
- AAHA/AAFP, Cornell and the ASPCA all advise one litter box per cat, plus one.
Odor litters fix the first part, never the second. Consumer Reports, which lab-tests litter, says a few products “did a good job of covering up smells,” and none stopped tracking completely.
One more thing to know before you shop: cats care about scent more than we do. Vet groups advise unscented litter, so most of our picks have no added fragrance.
We sorted the picks by job.
Quick picks
Best overall clumping clay, for most cats and most homes
Best unscented and low dust, for dust-sensitive homes
Best for multiple cats, for busy boxes (unscented version linked)
Best natural, a plant-based clumping corn litter
Best crystal, for silica and stirring over scooping
Budget pick, low cost with no fragrance
How to choose
Pick clumping first. Clumping litter lets you lift out urine every day, which removes most of the smell. The ASPCA says most cats prefer clumping, unscented litter with a soft, sandy texture. Cornell’s Feline Health Center says most cats prefer unscented, finer-textured litter.
Skip the perfume. A scent covers odor for you, not your cat. Cat Friendly Homes, a site from feline vets, says scented litters can trigger asthma in cats and people. PetMD’s vet panel calls unscented litters with strong odor absorbers “usually a safer bet for sensitive cats.”
Treat “99% dust-free” with care. Almost every maker below makes some version of that claim. Testers and owners still report dust on several of them. Look at what independent testers found instead.
Know what plant litters trade. PetMD’s vets say plant litters (corn, wheat, pine) are biodegradable and often gentler on sensitive paws and noses. In the testing we read, they tend to be lighter and track more than clay.
Know what crystals trade. Silica crystals soak up urine instead of clumping. You scoop solids and stir, then replace the whole box. Urine stays in the litter until you do.
Check your box. If you use a self-cleaning box, check the maker’s litter rules. See our self-cleaning litter box guide.
Litter box hygiene matters more than the brand
No litter makes up for a dirty box. Here is what the vet sources agree on.
- Scoop at least once a day. The 2021 AAHA/AAFP Feline Life Stage Guidelines, Cat Friendly Homes, the ASPCA and Cornell all say daily.
- Wash the box on a schedule. The ASPCA says to fully clean the box at least weekly with mild, unscented soap. Cat Friendly Homes says every one to four weeks, with soap and hot water only. Cat Friendly Homes says to avoid strong chemicals and ammonia, and the ASPCA advises against bleach. Cornell says more cats means more frequent cleaning.
- Keep the right number of boxes. The rule from AAHA/AAFP, Cornell and the ASPCA is one box per cat, plus one. Two cats need three boxes, in separate spots.
- Keep litter shallow. The ASPCA and Cornell say most cats prefer one to two inches.
- Think twice about a hood. Cornell says most cats prefer an uncovered box that lets odors escape. The ASPCA notes covered boxes can trap odors inside.
- Size up. AAHA/AAFP says a box should be at least one and a half times the cat’s length, nose to tail tip, and that most store boxes are too small.
- Replace old boxes. Cornell says to replace boxes that smell or are cracked.
If you switch litters, Cornell advises doing it slowly, mixing small amounts of the new litter into the old. If your cat starts going outside the box, call your vet. AAHA/AAFP notes unscented clumping litter may be preferred for cats with a history of urinary problems.
What to know about these picks
We have not tested these litters. Our main independent sources are Forbes Vetted’s July 2026 roundup, where several cat owners tested over a dozen litters at home, and two Cats.com roundups (June and September 2026) where the writer tested with her own two cats. We also used a Forbes Vetted review of Dr. Elsey’s Ultra and a Cats.com crystal litter review.
Odor results in these reviews are tester impressions, not lab measurements. Wirecutter’s litter guide could not be accessed for this update. Consumer Reports’ September 2026 litter ratings are members only, so they did not shape these picks. Dr. Elsey’s quotes Wirecutter on its own site, but we could not check that quote at the source, so we do not repeat it as a finding.
Specs come from maker pages or Chewy listings. We do not list prices, since they change often.
Specs compared
| Pick | Best for | Material | Scent | Clumping | Dust |
|---|---|---|---|---|---|
| Dr. Elsey’s Ultra Unscented Clumping Clay | Best overall clumping clay | Natural clay blend | Unscented | Hard clumping (maker claim) | 99% dust-free (maker claim) |
| Boxiecat Premium Unscented Clumping Clay | Unscented, low dust | 100% bentonite clay | No added fragrance | Clumping | Dust-free (maker claim) |
| Arm & Hammer Clump & Seal Slide Multi-Cat | Multiple cats | Not listed | Scented (unscented version sold) | Non-stick, tight clumps | Very little (Forbes testers) |
| World’s Best Cat Litter Multiple Cat Unscented | Natural, plant-based | Whole-kernel corn | No added fragrance | Clumping (maker claim) | Little to none (Forbes testers) |
| Ultra Micro Crystals Unscented | Crystal, silica | Silica gel crystals | Unscented | Non-clumping | 99.9% dust-free (listing claim) |
| Tidy Cats Free & Clean Unscented | Budget | Clay with activated charcoal | Free of fragrance and dyes | Clumping | Low dust (Forbes); reviews mixed |
Specs from maker pages, Chewy listings and Forbes Vetted testing, October 2026. Formulas change; check the bag and listing.
The picks in detail
Cats Clumping clay Research pick
Dr. Elsey's Ultra Unscented Clumping Clay
Best overall clumping clay
Verdict: The safest first choice: unscented, hard clumping and well reviewed by two independent testers.
What it does well: Dr. Elsey’s describes a natural clay blend with no added perfume or deodorant, “hard clumping” and “99% dust-free,” and calls it good for multi-cat homes and mechanical boxes. Forbes Vetted named it the runner-up in its 2026 roundup. Testers said it masked waste odors well, and the pebbles “stayed intact” even when a cat dug. In a separate Forbes review, the tester’s six days with it found it did “a great job at keeping smells under control” and gave off “significantly less dust” than competing litters. Cats.com made it the budget pick in its odor roundup and said the heavier granules help reduce tracking. It is also the litter on our cats page.
The downsides: Clumps sometimes stuck to the pan in Forbes testing. The reviewer recommends at least 3 inches of litter to avoid this, which is deeper than the one to two inches vet sources say cats prefer. Cats.com notes some customers find it “dustier than they’d like.” Forbes testers found the plastic bag flimsy and hard to pour. Chewy lists it in heavy 20 lb and 40 lb bags.
Skip it if: you need a light bag to carry, or you want a plant-based litter.
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Cats Low dust Research pick
Boxiecat Premium Unscented Clumping Clay
Best unscented, low dust
Verdict: The low-dust upgrade, and the overall winner at both Forbes Vetted and Cats.com in some form.
What it does well: Forbes Vetted named it the best cat litter overall. One tester said it “created minimal dust and kept my bathroom smelling fresh over the course of a week.” One tester said its clumps stayed solid in both automatic and manual boxes, and another said waste did not stick to the bottom. Boxiecat lists 100% bentonite clay with no added fragrance. It claims 30-day odor control and calls it dust-free. Cats.com’s 2026 overall pick was Boxiecat’s probiotic version, which it said forms “hard, tight clumps.”
The downsides: Forbes calls it “at the more expensive end of clay clumping litters.” Boxiecat’s own FAQ says multi-cat homes should replace litter more often. Several recent Chewy reviews say the color, dust, clumping or odor control changed after a formula change. We could not confirm what changed. Boxiecat’s page does not say whether it suits automatic boxes, though Forbes testers used it in one.
Skip it if: cost per bag matters most to you.
See it on Amazon Affiliate link
Cats Multi-cat Research pick
Arm & Hammer Clump & Seal Slide Multi-Cat
Best for multiple cats
Verdict: The strongest clumps in the testing we read, with a scent most vets would rather you skip.
What it does well: Forbes Vetted called it the best tight-clumping litter. One tester said, “I have yet to witness a clumping litter as strong as this one.” Forbes found very little dust and minimal tracking. Cats.com named it best for multiple cats in its odor roundup and best for automatic boxes in its main roundup. Arm & Hammer says the litter is non-stick and “slides right out of the litter box,” and markets it for homes with more than one cat.
The downsides: The version these reviewers tested is scented. Forbes called it “strongly perfumed,” and one tester noticed a musty smell after several days. Another said it stuck to a stainless steel box. Cats.com says its sandy texture can track. Chewy lists an unscented version, but we found no independent test of it.
Skip it if: your cat or anyone at home is sensitive to fragrance. Choose Dr. Elsey’s Ultra, which its maker also markets for multi-cat homes, or look for the unscented Slide.
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Cats Plant-based Research pick
World's Best Cat Litter Multiple Cat Unscented
Best natural
Verdict: The best-tested clumping plant litter, if your cat accepts the coarser feel.
What it does well: World’s Best makes it from whole-kernel U.S. corn with no added fragrance and claims it clumps fast without sticking to the box. Forbes Vetted named it the best dust-free litter. All its testers saw little to no dust. One said, “The large clumps remain together, and it was easier than others to remove from the sides.” Most testers said it masked odors well. Cats.com also picked a World’s Best formula (its Low Tracking and Dust Control version) as its premium natural pick.
The downsides: One Forbes tester’s bathroom started smelling “almost sour and pungent” over time, until a fresh batch. Another tester’s cat disliked the rough, pebble-like texture, so Forbes suggests a gradual switch. The maker calls it flushable, but Consumer Reports does not recommend flushing litter at home because of toxoplasmosis concerns. California also discourages flushing cat feces, per the maker’s own page. Bag it instead.
Skip it if: your cat is fussy about texture. Two other plant options came up in testing: Forbes’ natural pick was sWheat Scoop Multi-Cat (wheat), and Cats.com’s top odor pick was Feline Pine Original, a non-clumping pine pellet that needs refreshing every 7 to 10 days.
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Cats Crystal Research pick
Ultra Micro Crystals Unscented
Best crystal
Verdict: The crystal pick for owners who want low dust and little tracking, with weaker odor evidence than our clay picks.
What it does well: Chewy’s listing describes super-absorbent silica gel with “instant and long-term odor control” and a 99.9% dust-free claim. Cats.com made it the best crystal litter in its main roundup, calling it “very low dust and relatively low tracking.” Its odor roundup said the crystals absorb liquid immediately and dry out solids “to keep the smell at bay.”
The downsides: A separate Cats.com review of Litter Pearls Micro Unscented, a similar silica litter (we could not confirm it is the same product), rated odor control 3 out of 5. The reviewer said it “didn’t absorb all of the urine odor” and turned discolored after a few uses. You need to stir it at least daily. The listing says it is for cats and kittens over 12 weeks, should not be eaten and should not be flushed. Cats.com noted the bag is not resealable.
Skip it if: urine odor is your main problem, or you have a kitten under 12 weeks.
See it at Chewy Affiliate link
Cats Budget Research pick
Tidy Cats Free & Clean Unscented
Best budget
Verdict: A low-cost, fragrance-free clay with activated charcoal, backed by less testing detail than our other picks.
What it does well: Forbes Vetted named it the best value litter and listed it as a low-dust, scent-free option. Purina says it is free of fragrances and dyes, uses activated charcoal to trap odor, and claims 10-day odor control. Chewy and Purina list many sizes, from jugs to pails and boxes.
The downsides: We could not read Forbes’ full tester notes for this pick. Forbes says to skip it if you want a low-tracking litter. Chewy reviews are mixed on dust. One reviewer called the 99.9% dust-free claim “bogus,” and a five-cat owner reported poor odor control and clumping.
Skip it if: you have several cats and a busy box, or tracking bothers you.
See it on Amazon Affiliate link
Questions people ask
Is scented litter better for smell?
It covers smell for people. Vet sources still advise unscented, since many cats dislike fragrance and Cat Friendly Homes says scented litters can trigger asthma.
How many litter boxes do I need for two cats?
Three. The vet rule is one per cat, plus one.
Can I flush cat litter?
Consumer Reports does not recommend it, even for “flushable” litters, because of toxoplasmosis concerns. PetMD’s vets also say to bag and trash it.
Sources and further reading
- Forbes Vetted, “The Best Cat Litters Of 2026, Tested By Felines In Our Own Homes” (updated July 2026)
- Forbes Vetted, Dr. Elsey’s Ultra Cat Litter review (2023, updated 2026)
- Cats.com, “7 Best Cat Litters for Odor Control in 2026” (updated June 2026)
- Cats.com, “13 Best Cat Litters of 2026” (updated September 2026)
- Cats.com, Litter Pearls Micro Unscented crystal litter review (September 2025)
- Consumer Reports, “Best Cat Litter From Our Tests” (updated September 2026, ratings members only)
- AAHA/AAFP, 2021 Feline Life Stage Guidelines, “General Litter Box Considerations”
- Cat Friendly Homes, “Everything You Should Know About Litter Boxes”
- Cornell Feline Health Center, “Feline Behavior Problems: House Soiling”
- ASPCA, “Addressing Litter Box Problems”
- PetMD, “Best Cat Litters, Recommended by Vets” (updated January 2026)
- Dr. Elsey’s, Ultra Litter product page
- Boxiecat, Unscented Natural Clumping Clay Litter
- Arm & Hammer, Slide Easy Clean-Up Clumping Litter, Multi-Cat
- World’s Best Cat Litter, Multiple Cat Unscented
- Purina, Tidy Cats Free & Clean Unscented Clumping Cat Litter
- Chewy listings and owner reviews for each pick
Product details and formulas change. Confirm the version, size and scent on the retailer page before you buy. This guide is general information, not veterinary advice.
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