Permanent teeth embed
Use this on adult-dentition or general tooth-numbering resource pages.
Free dental reference tool
Tooth numbering chart & notation converter
Click any tooth to see its number in all three systems at once — Universal (US / ADA), FDI two-digit (ISO 3950), and Palmer. Switch between permanent and primary teeth, look a tooth up by any notation, and print a clean reference table. Built for clinicians, hygienists, dental students, and internationally-trained dentists moving between systems.
Select any tooth to convert its number.
Full conversion table
Print / save as PDFUpper right
| Tooth | Universal | FDI | Palmer |
|---|---|---|---|
| 8 | 11 | 1 | |
| 7 | 12 | 2 | |
| 6 | 13 | 3 | |
| 5 | 14 | 4 | |
| 4 | 15 | 5 | |
| 3 | 16 | 6 | |
| 2 | 17 | 7 | |
| 1 | 18 | 8 |
Upper left
| Tooth | Universal | FDI | Palmer |
|---|---|---|---|
| 9 | 21 | 1 | |
| 10 | 22 | 2 | |
| 11 | 23 | 3 | |
| 12 | 24 | 4 | |
| 13 | 25 | 5 | |
| 14 | 26 | 6 | |
| 15 | 27 | 7 | |
| 16 | 28 | 8 |
Lower left
| Tooth | Universal | FDI | Palmer |
|---|---|---|---|
| 24 | 31 | 1 | |
| 23 | 32 | 2 | |
| 22 | 33 | 3 | |
| 21 | 34 | 4 | |
| 20 | 35 | 5 | |
| 19 | 36 | 6 | |
| 18 | 37 | 7 | |
| 17 | 38 | 8 |
Lower right
| Tooth | Universal | FDI | Palmer |
|---|---|---|---|
| 25 | 41 | 1 | |
| 26 | 42 | 2 | |
| 27 | 43 | 3 | |
| 28 | 44 | 4 | |
| 29 | 45 | 5 | |
| 30 | 46 | 6 | |
| 31 | 47 | 7 | |
| 32 | 48 | 8 |
For schools, blogs, and resource pages
Embed this tooth numbering chart
Add the interactive chart to a dental education page, clinic reference page, or student resource list. Keep the Dentovio attribution link so readers can open the full chart, printable table, and individual tooth pages.
Primary teeth embed
Use this on pediatric, hygiene, or dental-student pages that need A-T notation.
Prefer a plain link? Use https://dentovio.com/tools/tooth-numbering-chart.
Universal (US / ADA)
The standard system in the United States. Permanent teeth are numbered 1–32, starting at the upper right third molar (1) and running clockwise to the lower right third molar (32). Primary teeth are lettered A–T.
FDI / ISO 3950
The international two-digit standard. The first digit is the quadrant (1–4 permanent, 5–8 primary); the second is the position from the midline, 1 (central incisor) to 8 (third molar). Example: FDI 26 is the upper left first molar.
Palmer notation
Common in orthodontics and the UK. Each tooth is its position from the midline (1–8, or A–E for primary teeth) written inside a bracket whose two lines mark the quadrant — midline and occlusal plane.
Look up a specific tooth
Dedicated reference pages for each permanent and primary tooth — name, type, roots, and every notation.
Permanent teeth
- 1Third Molar
- 2Second Molar
- 3First Molar
- 4Second Premolar
- 5First Premolar
- 6Canine
- 7Lateral Incisor
- 8Central Incisor
- 9Central Incisor
- 10Lateral Incisor
- 11Canine
- 12First Premolar
- 13Second Premolar
- 14First Molar
- 15Second Molar
- 16Third Molar
- 17Third Molar
- 18Second Molar
- 19First Molar
- 20Second Premolar
- 21First Premolar
- 22Canine
- 23Lateral Incisor
- 24Central Incisor
- 25Central Incisor
- 26Lateral Incisor
- 27Canine
- 28First Premolar
- 29Second Premolar
- 30First Molar
- 31Second Molar
- 32Third Molar
Primary teeth
Frequently asked questions
- What are the three main tooth numbering systems?
- Dentistry uses three systems. The Universal Numbering System (ADA), standard in the United States, numbers the 32 permanent teeth 1 to 32 and the 20 primary teeth A to T. The FDI two-digit system (ISO 3950), used internationally, gives each tooth a quadrant digit followed by a position digit, such as 26. Palmer notation records the tooth's position from the midline (1 to 8, or A to E for baby teeth) inside a bracket that marks the quadrant.
- How do I convert a Universal tooth number to FDI?
- Select the tooth on the chart or pick its Universal number, and the tool shows the matching FDI (ISO 3950) and Palmer designations. For example, Universal 14 is FDI 26 and Palmer upper-left 6 — the upper left first molar.
- Which tooth is number 14?
- In the Universal Numbering System, tooth 14 is the upper left (maxillary left) first molar. Its FDI designation is 26 and its Palmer designation is upper-left 6.
- What is the FDI (ISO 3950) two-digit notation?
- FDI notation gives each tooth two digits. The first digit is the quadrant (1 upper right, 2 upper left, 3 lower left, 4 lower right for permanent teeth; 5 to 8 for primary teeth). The second digit is the position from the midline, 1 for the central incisor out to 8 for the third molar. So FDI 36 is the lower left first molar.
- How are baby (primary) teeth numbered?
- In the Universal system the 20 primary teeth are lettered A through T, starting at the upper right second molar (A) and ending at the lower right second molar (T). In FDI notation primary quadrants are 5 to 8, and Palmer notation uses the letters A to E from the midline outward.
- Which teeth are the wisdom teeth?
- The wisdom teeth are the four third molars: Universal 1, 16, 17, and 32 (FDI 18, 28, 38, and 48). They are the last teeth in each quadrant.