Cat Dental Formula: How Many Teeth Cats Have and Why It Matters

The cat dental formula is a short code that shows how many teeth a cat has in each jaw. Adult cats have 30 teeth, and kittens have 26 baby teeth.

This guide breaks the cat dental formula into plain words. You will learn when each set of teeth comes in, how vets number them, and why the count matters for your cat's health.

What is the cat dental formula?

A dental formula is a shorthand that vets use to describe a mouth. It lists each type of tooth on one side of the head. The top number shows the upper jaw, and the bottom number shows the lower jaw.

Then you multiply by two, because the left and right sides match. So the cat dental formula reads 2 × (I 3/3, C 1/1, P 3/2, M 1/1). In this code, I means incisors, C means canines, P means premolars and M means molars.

Add up the cat dental formula and you get 30 adult teeth. A dvm360 dental anatomy review gives this exact formula, and it also notes that the upper first premolar and the lower first and second premolars are absent in cats.

The kitten version is shorter. Baby teeth have no molars, so the kitten cat dental formula is 2 × (i 3/3, c 1/1, p 3/2) = 26 teeth. Vets often write the baby teeth in lower case letters to show the difference.

How many teeth do cats have?

An adult cat has 30 teeth. According to VCA Animal Hospitals, 16 of those teeth sit in the upper jaw and 14 sit in the lower jaw.

That 16 and 14 split comes straight from the cat dental formula. On each side of the upper jaw, a cat has 3 incisors, 1 canine, 3 premolars and 1 molar. On each side of the lower jaw, a cat has 3 incisors, 1 canine, 2 premolars and 1 molar.

Cats have far fewer teeth than dogs. In fact, cats have a short face and a shearing bite, so they need fewer grinding teeth. Most of the work happens at the side of the mouth, where the sharp premolars and molars slice meat.

The Cornell Feline Health Center gives the same totals. It describes 26 milk teeth in kittens and 30 permanent teeth in adults.

Cat dental formula for kittens: baby teeth timeline

Kittens are born without visible teeth. Then the baby teeth push through the gums in the first weeks of life. Sources give slightly different ages, so it helps to think in ranges.

• VCA says baby teeth start to erupt at around three weeks and finish by 6 to 8 weeks of age.
• Cornell notes that kitten teeth start to appear when a kitten is about four weeks old.
• By about 2 months, a kitten has all 26 baby teeth, as VCA explains on its kitten teeth page.

Next comes the swap. According to VCA's guide to retained baby teeth, teething runs from about 10 weeks to 6 months of age. During this time, adult teeth push the baby teeth out.

You may find a tiny tooth on the floor. Still, many kittens swallow their baby teeth, and that is normal. By 6 to 7 months, most kittens have all 30 adult teeth.

If you plan to start brushing, this is a good time to build the habit. Our guide to brushing kitten teeth shows how to begin gently while the mouth changes.

Cat dental formula at a glance: kitten vs adult

This table lines up the two versions of the cat dental formula. Use it when you look in your cat's mouth or read a vet report.

As you can see, the only real change in the cat dental formula is the molars and the size of each tooth. The pattern of incisors, canines and premolars stays the same.

What each tooth type does

Each part of the cat dental formula has a job. VCA describes four main tooth types.

• Incisors. These small front teeth help with grooming and with nibbling small bits of food.
• Canines. The long fangs grasp food and prey, and indoor cats use them a lot in play.
• Premolars. These sharp, serrated teeth crunch and slice food.
• Molars. These flat back teeth mostly crunch hard food.

Two teeth deserve a special mention. The upper fourth premolar and the lower first molar work like a pair of scissors. Vets call them the carnassial teeth, as the dvm360 review explains.

These big shearing teeth matter for dental health too. They carry a heavy load, so they are worth a close look at every checkup.

How vets number teeth in the cat dental formula

Vets do not just count teeth. They also give each tooth a number, so they can chart problems with care. Most vets use the modified Triadan system.

The first digit shows the quarter of the mouth. For example, 1 is the upper right, 2 is the upper left, 3 is the lower left and 4 is the lower right. The next two digits show the tooth position, counting from the middle.

Because the cat dental formula has fewer teeth, some numbers are missing. The AVDC Triadan chart lists the upper cat teeth as 101 to 104 and 106 to 109 on the right side. On the lower jaw, the right side runs from 401 to 404 and then 407 to 409.

So there is no 105 or 205 in a cat. The MSD Veterinary Manual confirms this, and it adds that the single molar in each quarter carries the number 109, 209, 309 or 409.

A simple trick helps here. The canine is always number 4, and the first molar is always number 9. That is why the AVDC nomenclature says the first premolar on the upper left of a cat is 206, not 205.

1. Find the quarter of the mouth, such as the upper right.
2. Count the incisors, canine, premolars and molar on that side.
3. Compare your count with the cat dental formula in the table above.
4. Note any extra teeth, gaps, broken teeth or red gums.
5. Book a vet visit if anything looks different, since many problems hide under the gum line.

When the count does not match the cat dental formula

Sometimes a mouth does not match the standard cat dental formula. That can happen for several reasons, and some of them need care.

Extra teeth and the cat dental formula

If two teeth seem to share one space, a baby tooth may not have fallen out. VCA calls this a retained baby tooth. It can crowd the mouth, push teeth out of line and trap more tartar.

According to VCA, the upper canines are the most common retained teeth, followed by the lower canines and then the incisors. VCA also advises removing these teeth early rather than waiting for a spay or neuter visit.

True extra teeth also exist, but they are rare. In a radiograph study of 115 cats referred for dental care, only 1.7% had a supernumerary tooth.

Missing teeth and the cat dental formula

Missing teeth are more common, especially in older cats. VCA notes that tooth loss is common over time but not normal, since dental disease or injury often causes it.

In the same referral study, 75.5% of cats had missing teeth as a main finding. Also, 72.4% of those cats still had root fragments under the gum. That is why vets often take X-rays when a tooth seems gone.

Tooth resorption

Tooth resorption is a painful process that slowly eats away at a tooth. Today's Veterinary Practice reports that it affects 28% to 68% of mature cats, depending on the group studied.

Cornell gives a similar range of 30% to 70%. Because these teeth can look normal on top, only an exam and X-rays can show the full picture.

Why the cat dental formula matters for health

Knowing the cat dental formula helps you notice change early. Dental disease is very common in cats, so small changes count.

A large RVC VetCompass study looked at 18,249 cats in UK vet clinics. It found that vets diagnose periodontal disease in 15.2% of cats each year, which made it the most common disorder in the study.

Exam-based numbers run even higher. According to the Cornell Feline Health Center, between 50% and 90% of cats older than four have some form of dental disease. Cornell also estimates that periodontal disease affects about 85% of cats over age six.

In other words, most cats will need dental help at some point. If you want to learn the early signs, read our guide to stages of gingivitis in cats.

Dental checks that fit the cat dental formula

Home checks are useful, but they cannot replace a vet exam. The AVMA advises that a vet should check your pet's teeth at least once a year.

For young cats, AAHA advises an oral exam at each kitten wellness visit. It also recommends a first full exam under anesthesia with full-mouth X-rays by one year of age.

Why X-rays? The AAHA dental guidelines cite a finding in cats that 42% of teeth that looked normal on top showed important changes on X-rays. So a tooth count alone can miss real problems.

• Look at the teeth and gums once a week in good light.
• Smell the breath, since a strong odor can signal trouble.
• Watch for chewing on one side, dropping food or pawing at the mouth.
• Book a vet visit if you see red gums, broken teeth or gaps.

How to check your cat's teeth against the cat dental formula

You do not need tools to take a quick look. Still, go slowly, because many cats dislike having their mouth handled.

1. Pick a calm time, such as after a meal or a nap.
2. Sit your cat on your lap or a towel, facing away from you.
3. Gently lift the upper lip at the side to see the canine and the premolars behind it.
4. Next, pull the lower lip down a little to see the lower teeth.
5. Stop and give a treat if your cat struggles, then try again another day.

You will rarely see every tooth at home, and that is fine. The goal is to spot changes, not to match the full cat dental formula. If you notice a broken tooth, a red line on the gums or a gap, write it down with the date and show your vet.

Over time, these short checks build trust. They also make it easier to start brushing later, since your cat learns that a hand near the mouth is no big deal.

Daily care to protect every tooth

Brushing is still the best home habit for most cats. Our guide on how often to brush cat teeth explains a simple routine you can build over a few weeks.

If your cat will not accept a brush, there are other options. See our guide to cat teeth without brushing for diets, treats and water additives with real trial data.

Some owners also like a daily mealtime powder. Kittysum Dental+ is a daily nutrition support powder that mixes into food. It does not replace brushing or vet cleanings, so please talk with your vet first.

For a full home plan, our guide to cat dental care at home brings all of these steps together. Young cats with red gums may also need our guide to juvenile periodontitis in cats.

Myths about the cat dental formula

• Myth: cats have the same teeth as dogs. Cats have 30 adult teeth, while dogs have more, so the formulas differ.
• Myth: baby teeth do not matter. A retained baby tooth can crowd the mouth and trap tartar, so it needs a vet check.
• Myth: a full count means a healthy mouth. A cat can match the cat dental formula and still have disease below the gum line.
• Myth: a missing tooth is always gone. Root pieces often stay behind, which is why vets use X-rays.

The bottom line is simple. The cat dental formula gives you a map, but your vet gives you the full picture.

Key Terms

• Cat dental formula: the code 2 × (I 3/3, C 1/1, P 3/2, M 1/1) that shows a cat's 30 adult teeth.
• Deciduous teeth: the 26 baby teeth that kittens shed as adult teeth come in.
• Carnassial teeth: the upper fourth premolar and lower first molar, which shear meat like scissors.
• Modified Triadan system: the three-digit tooth numbering system vets use to chart each tooth.
• Tooth resorption: a process that slowly breaks down tooth tissue and often causes pain.