๐ข Tooth Numbering Converter
Type a tooth number in any system or tap it on the chart to get all three notations and the tooth name.
Tap any tooth. The chart is viewed from the front: the patient's right is on your left.
Permanent teeth numbering table
| Tooth | FDI | Universal | Palmer |
|---|---|---|---|
| Upper right central incisor | 11 | 8 | 1โ (UR1) |
| Upper right lateral incisor | 12 | 7 | 2โ (UR2) |
| Upper right canine | 13 | 6 | 3โ (UR3) |
| Upper right first premolar | 14 | 5 | 4โ (UR4) |
| Upper right second premolar | 15 | 4 | 5โ (UR5) |
| Upper right first molar | 16 | 3 | 6โ (UR6) |
| Upper right second molar | 17 | 2 | 7โ (UR7) |
| Upper right third molar (wisdom tooth) | 18 | 1 | 8โ (UR8) |
| Upper left central incisor | 21 | 9 | โ1 (UL1) |
| Upper left lateral incisor | 22 | 10 | โ2 (UL2) |
| Upper left canine | 23 | 11 | โ3 (UL3) |
| Upper left first premolar | 24 | 12 | โ4 (UL4) |
| Upper left second premolar | 25 | 13 | โ5 (UL5) |
| Upper left first molar | 26 | 14 | โ6 (UL6) |
| Upper left second molar | 27 | 15 | โ7 (UL7) |
| Upper left third molar (wisdom tooth) | 28 | 16 | โ8 (UL8) |
| Lower left central incisor | 31 | 24 | โ1 (LL1) |
| Lower left lateral incisor | 32 | 23 | โ2 (LL2) |
| Lower left canine | 33 | 22 | โ3 (LL3) |
| Lower left first premolar | 34 | 21 | โ4 (LL4) |
| Lower left second premolar | 35 | 20 | โ5 (LL5) |
| Lower left first molar | 36 | 19 | โ6 (LL6) |
| Lower left second molar | 37 | 18 | โ7 (LL7) |
| Lower left third molar (wisdom tooth) | 38 | 17 | โ8 (LL8) |
| Lower right central incisor | 41 | 25 | 1โ (LR1) |
| Lower right lateral incisor | 42 | 26 | 2โ (LR2) |
| Lower right canine | 43 | 27 | 3โ (LR3) |
| Lower right first premolar | 44 | 28 | 4โ (LR4) |
| Lower right second premolar | 45 | 29 | 5โ (LR5) |
| Lower right first molar | 46 | 30 | 6โ (LR6) |
| Lower right second molar | 47 | 31 | 7โ (LR7) |
| Lower right third molar (wisdom tooth) | 48 | 32 | 8โ (LR8) |
Primary teeth numbering table
| Tooth | FDI | Universal | Palmer |
|---|---|---|---|
| Upper right primary central incisor | 51 | E | Aโ (URA) |
| Upper right primary lateral incisor | 52 | D | Bโ (URB) |
| Upper right primary canine | 53 | C | Cโ (URC) |
| Upper right primary first molar | 54 | B | Dโ (URD) |
| Upper right primary second molar | 55 | A | Eโ (URE) |
| Upper left primary central incisor | 61 | F | โA (ULA) |
| Upper left primary lateral incisor | 62 | G | โB (ULB) |
| Upper left primary canine | 63 | H | โC (ULC) |
| Upper left primary first molar | 64 | I | โD (ULD) |
| Upper left primary second molar | 65 | J | โE (ULE) |
| Lower left primary central incisor | 71 | O | โA (LLA) |
| Lower left primary lateral incisor | 72 | N | โB (LLB) |
| Lower left primary canine | 73 | M | โC (LLC) |
| Lower left primary first molar | 74 | L | โD (LLD) |
| Lower left primary second molar | 75 | K | โE (LLE) |
| Lower right primary central incisor | 81 | P | Aโ (LRA) |
| Lower right primary lateral incisor | 82 | Q | Bโ (LRB) |
| Lower right primary canine | 83 | R | Cโ (LRC) |
| Lower right primary first molar | 84 | S | Dโ (LRD) |
| Lower right primary second molar | 85 | T | Eโ (LRE) |
How the three systems differ
- FDI (ISO 3950) โ Two digits: quadrant (1โ4 permanent, 5โ8 primary) then tooth from the midline (1โ8). Used internationally.
- Universal (ADA) โ Permanent teeth 1 (upper right third molar) to 32; primary teeth AโT. Used mainly in the USA.
- Palmer (Zsigmondy) โ Number 1โ8 (AโE for primary) with an angle symbol for the quadrant. Popular in orthodontics and the UK.
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Medical records with an interactive dental chart, appointments with WhatsApp reminders, billing and stock โ with the EME clinic system.
๐ฉบ Medically reviewed by: Dr. Mohammad Alshami (Dentist โ Oral Surgery & Dental Implants) and Dr. Sohaib Alshami (Surgeon โ Aesthetic Medicine) ยท Last reviewed: 2026-10-02
Sources: ISO 3950:2016 ยท ADA Universal Numbering System ยท Palmer/Zsigmondy notation
This tool is for education only and does not replace a dentist's advice.
Frequently asked questions
What number is a wisdom tooth?
FDI: 18, 28, 38 and 48. Universal: 1, 16, 17 and 32. Palmer: 8 in each quadrant.
What is tooth number 36?
In FDI it is the lower left first molar (6-year molar) โ #19 in Universal and LL6 in Palmer.
Why are baby teeth numbered 51 to 85?
In FDI, quadrants 5โ8 are reserved for primary teeth, with 5 teeth (1โ5) in each quadrant.
Which system should I use?
FDI (ISO 3950) is the international standard; Universal is common in the USA; Palmer is popular in orthodontics and the UK.
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