With all four wisdom teeth, you have 32 permanent teeth. Without them, you have 28. That’s the quick answer, but the full picture is more interesting because not everyone ends up with the same number.
Your 32 Teeth by Type
A complete adult mouth contains 32 teeth split evenly between your upper and lower jaws, with 16 on top and 16 on the bottom. Each type of tooth has a different shape and job:
- 8 incisors: the four front teeth on top and four on the bottom, used for biting into food
- 4 canines: the pointed teeth next to your incisors, one in each corner, built for tearing
- 8 premolars: two on each side, upper and lower, with flat surfaces for crushing
- 12 molars: three on each side, upper and lower, your heaviest chewing teeth
Your wisdom teeth are the last of those 12 molars. Dentists call them third molars because they sit behind your first and second molars at the very back corners of your mouth. There are four total: upper right, upper left, lower right, and lower left.
Why Your Count Might Be Different
Saying “32 teeth” assumes every tooth developed and came in normally, which doesn’t happen for everyone. About 22.6% of people worldwide are naturally missing at least one wisdom tooth because it simply never formed. This is called agenesis, and rates vary by population. In Asian populations the rate climbs to nearly 30%. If you’re missing one or two wisdom teeth and never had them removed, they likely never existed in the first place.
Some people are also born missing other permanent teeth. Overall, about 6.4% of the population is missing at least one non-wisdom permanent tooth. The most commonly absent teeth (aside from wisdom teeth) are the second premolars and the small incisors next to your upper front teeth.
When Wisdom Teeth Come In
Wisdom teeth are the last to arrive, typically erupting between ages 17 and 25. By comparison, your other permanent teeth are usually all in place by age 12 or 13. This late arrival is part of why wisdom teeth cause so many problems. By the time they try to push through, your jaw may not have enough room left.
Between 30% and 60% of people who initially have no symptoms from their wisdom teeth end up needing at least one removed within 4 to 12 years. Impaction, where the tooth is trapped beneath the gum or pressed against the neighboring molar, is the most common reason for extraction.
How Many Teeth After Wisdom Tooth Removal
If all four wisdom teeth are extracted, you’re left with 28 permanent teeth. This is the most common adult tooth count in practice, since so many people have their wisdom teeth removed in their late teens or twenties. Losing those four molars doesn’t affect your ability to chew. Your first and second molars handle the vast majority of grinding work, and your bite functions normally with 28 teeth.
If only one, two, or three wisdom teeth were removed (or never developed), just subtract from 32. Someone with two wisdom teeth removed and one that never formed, for example, has 29.
Children Have Fewer Teeth
Kids start with a set of 20 primary (baby) teeth: 8 incisors, 4 canines, and 8 molars. There are no premolars in a baby set. These begin falling out around age 6, and the transition to a full permanent set takes roughly six to seven years, not counting the wisdom teeth that show up much later. During that transition, children have a mix of baby and adult teeth, so the total count fluctuates.
Once all the baby teeth are gone and the permanent teeth (minus wisdom teeth) are in, a teenager typically has 28 teeth. The final jump to 32 happens only if all four wisdom teeth erupt successfully.