Welcome to Tooth Number Chart, a free, plain-language guide to how dentists number teeth. Whether you are studying for dental or dental hygiene school, or just want to know what your dentist meant by “tooth number 14,” you are in the right place.
Interactive tooth number chart
Pick a numbering system and adult or baby teeth, then select any tooth. The chart is drawn the way dentists see it: facing the patient, so the patient’s right side is on your left.
Start here
Dental students
Master the Universal, FDI and Palmer systems, convert between them, and drill with the quiz before exams and clinic.
Dental hygiene students
Chart quickly and accurately: quadrants, adult and baby teeth, mixed dentition and eruption ages.
Curious patients
Saw a tooth number on your treatment plan or X-ray? Find it on the chart above to see exactly which tooth it is.
Three numbering systems, two sets of teeth
- Universal (used in the United States): adult teeth 1–32, baby teeth A–T.
- FDI / ISO 3950 (used in most of the world): a two-digit code, quadrant then tooth, e.g. 11 or 26.
- Palmer (common in the UK and orthodontics): a quadrant bracket plus 1–8 for adult teeth or A–E for baby teeth.
Adults usually have 32 permanent teeth (including four wisdom teeth). Children have 20 primary (baby) teeth. Between about ages 6 and 12, children have a mix of both. Parents: see the baby teeth chart for when each tooth comes in and falls out.
This site is for education only and is not a substitute for advice from your dentist.