Can You Put Baking Soda in Cat Litter? Safety and Odor Facts
A small sprinkle is safe. Whether it helps is another question, and the chemistry is less simple than it sounds.
Can you put baking soda in cat litter? Yes, a small amount is safe for most cats. Whether it helps with odor is less certain, and too much can add dust or put a fussy cat off the box. Here’s what vets, poison data and our own testing say.
Short answer
A few tablespoons mixed into the litter is safe for healthy cats, according to a vet-reviewed guide. But there’s no published measurement showing baking soda lowers ammonia in a box, and some argue it can make ammonia worse. Scooping daily and using activated carbon or a good unscented clumping litter works better.
Is Baking Soda Safe for Cats?
In the small amounts used in litter, yes. Baking soda, or sodium bicarbonate, only becomes dangerous if a cat eats a lot of it. The American College of Veterinary Pharmacists says toxic effects may appear after eating 10 to 20 grams per kilogram of body weight. For a 10 lb cat, that’s a large amount compared with a light sprinkle in a box.
The main risks are practical. Baking soda is a fine powder, so it can make a litter box dustier, which may irritate a cat’s airways. Kittens and cats that eat litter could swallow more than a lick. If your cat eats litter, skip baking soda altogether and ask your vet about the habit.
Signs of baking soda poisoning include vomiting, diarrhea, lethargy, tremors and seizures, usually within three hours. If you suspect your cat has eaten a lot, call your vet or a pet poison hotline straight away.
Does Baking Soda Actually Stop Litter Odor?
It’s less clear than the tip suggests. Baking soda is a cheap odor-neutralizing layer, but I haven’t seen any measurement showing it lowers ammonia in a real litter box.
There’s also a chemistry argument against it. World’s Best Cat Litter, which makes a litter without baking soda, points out that baking soda has a pH of about 8.4. Ammonia escapes as a gas more readily as conditions become more alkaline, so raising the litter’s pH can release more of it.
Real-world data is mixed. Arm & Hammer builds baking soda into its litters. In our tests, its Super Scoop controlled odor for three to four weeks with one cat, while its Clump & Seal still reached 8 ppm of ammonia by day seven. Both litters combine baking soda with other ingredients, so they can’t isolate its effect.
I’ve tried adding baking soda myself, and it helped a little with smell. It’s not a substitute for daily scooping, though.
Why Some Cats Avoid Deodorized Litter
Cats have a far stronger sense of smell than we do. The AAFP and ISFM house-soiling guidelines note that cats often find aromatic litter and litter deodorizers offensive. Baking soda is unscented to us, but any change to the box can put a sensitive cat off.
Watch your cat after you add it. If it sniffs and walks away, digs less, or starts going beside the box, remove the baking soda and go back to plain litter. My guide on whether scented litter is bad for cats explains why simpler is usually better.
How to Use Baking Soda Safely
If you want to try it, keep it light and watch your cat. These steps keep it safe:
- Use no more than a few tablespoons for a standard box.
- Mix it through the litter rather than leaving a layer on top.
- Pour gently to limit dust, and skip it if anyone at home has asthma.
- Don’t use it for kittens or cats that eat litter.
- Stop if your cat hesitates to use the box.
More isn’t better. Overusing baking soda adds fine powder and makes the box dustier. My guide to low dust cat litter covers other ways to keep dust down.
Baking Soda vs Activated Carbon
Activated carbon, also called activated charcoal, is the main alternative. It traps odor molecules rather than changing pH, and it’s fragrance-free. It works better against the sharp ammonia smell, and it’s usually the better buy. Many litters, including Fresh Step and Tidy Cats, now build it in.
| Option | How it works | Cost | Main drawback |
|---|---|---|---|
| Baking soda | Neutralizes some odor compounds | Lowest | Adds dust; may raise pH |
| Activated carbon additive | Traps odor molecules | Moderate | Extra product to buy |
| Litter with carbon built in | Carbon mixed into the litter | Varies | Only as good as the litter |
Either way, both options only help if you also scoop daily and change the litter on schedule.
Better Ways to Control Litter Box Odor
Most litter box smell comes from waste left too long, not from the wrong additive. Scoop at least once a day, keep the litter about two inches deep and do full changes on a regular schedule. The AAFP and ISFM also recommend one box per cat plus one, which spreads the load.
A good unscented clumping litter does most of the work. My guides on how to get rid of litter box smell, how often to change cat litter and the best cat litter for odor control cover each step.
Should You Add Baking Soda to Your Cat’s Litter?
You can, and a few tablespoons mixed in is safe for most healthy cats. Just don’t expect it to fix a smelly box, since there’s no measured evidence it lowers ammonia and some chemistry suggests it can do the opposite. Watch for extra dust and for any sign your cat dislikes it.
If odor is the problem, fix the routine first: scoop daily, change on schedule and use enough boxes. Then consider a litter with activated carbon. My best cat litter guide lists the strongest unscented options.
Frequently Asked Questions
Is baking soda in cat litter safe?
In small amounts, yes. A few tablespoons mixed into the litter is fine for most cats. Baking soda only becomes toxic if a cat eats a lot: the American College of Veterinary Pharmacists puts the toxic dose at 10 to 20 grams per kilogram of body weight.
How much baking soda should I use?
No more than a few tablespoons mixed through a standard box. More adds fine powder that can make pouring and scooping dustier, and it won’t make odor control proportionally better. If your cat hesitates to use the box afterwards, stop using it.
Does baking soda help with cat litter smell?
It may help a little, but it’s not a reliable fix. There’s no published measurement showing it lowers ammonia in a litter box, and some argue it can make ammonia worse by raising the litter’s pH. Daily scooping and activated carbon are more dependable.
Is baking soda or activated carbon better?
Activated carbon is usually better. It’s fragrance-free and targets the sharp ammonia smell, while baking soda is mainly the cheapest option. Both only help if you also scoop daily and change the litter on schedule.
What happens if my cat eats baking soda?
A small lick from a lightly treated box is unlikely to cause harm, but eating a large amount can be toxic. Signs include vomiting, diarrhea, lethargy, tremors and seizures, usually within three hours. Call your vet or a pet poison hotline right away if you suspect it.