Tooth Numbering Chart
The Tooth Numbering Chart is a health reference tool covering tooth chart, tooth number chart, tooth numbering chart, teeth chart. Use the chart below to look up values instantly. Printable and downloadable versions are available on this page.
Tooth Number Lookup
Click any tooth on the diagram to get its number, name, function, and common procedures.
Click any tooth to see its name, location, and function
MolarPremolarCanineIncisor
Click a tooth above to see its details
Universal Tooth Numbering Chart — Adults
The Universal Numbering System used by dentists in the United States assigns numbers 1 through 32 to the 32 permanent adult teeth — starting at the upper right third molar and ending at the lower right third molar.
Universal Tooth Numbering Chart — Adult Permanent Teeth
| Tooth Number | Tooth Name | Location |
|---|---|---|
| #1 | Upper Right Third Molar (Wisdom Tooth) | Upper right, back |
| #2 | Upper Right Second Molar | Upper right |
| #3 | Upper Right First Molar | Upper right |
| #4 | Upper Right Second Premolar | Upper right |
| #5 | Upper Right First Premolar | Upper right |
| #6 | Upper Right Canine (Cuspid) | Upper right |
| #7 | Upper Right Lateral Incisor | Upper right, front |
| #8 | Upper Right Central Incisor | Upper right, centre-front |
| #9 | Upper Left Central Incisor | Upper left, centre-front |
| #10 | Upper Left Lateral Incisor | Upper left, front |
| #11 | Upper Left Canine (Cuspid) | Upper left |
| #12 | Upper Left First Premolar | Upper left |
| #13 | Upper Left Second Premolar | Upper left |
| #14 | Upper Left First Molar | Upper left |
| #15 | Upper Left Second Molar | Upper left |
| #16 | Upper Left Third Molar (Wisdom Tooth) | Upper left, back |
| #17 | Lower Left Third Molar (Wisdom Tooth) | Lower left, back |
| #18 | Lower Left Second Molar | Lower left |
| #19 | Lower Left First Molar | Lower left |
| #20 | Lower Left Second Premolar | Lower left |
| #21 | Lower Left First Premolar | Lower left |
| #22 | Lower Left Canine | Lower left |
| #23 | Lower Left Lateral Incisor | Lower left, front |
| #24 | Lower Left Central Incisor | Lower left, centre-front |
| #25 | Lower Right Central Incisor | Lower right, centre-front |
| #26 | Lower Right Lateral Incisor | Lower right, front |
| #27 | Lower Right Canine | Lower right |
| #28 | Lower Right First Premolar | Lower right |
| #29 | Lower Right Second Premolar | Lower right |
| #30 | Lower Right First Molar | Lower right |
| #31 | Lower Right Second Molar | Lower right |
| #32 | Lower Right Third Molar (Wisdom Tooth) | Lower right, back |
Source: American Dental Association (ADA) Universal Numbering System
Baby Tooth (Primary) Numbering Chart
Primary (baby) teeth use letter designations A through T rather than numbers — starting from the upper right second molar and following the same clockwise path as the adult universal system.
Primary Tooth Letter Chart — Baby Teeth A to T
| Tooth Letter | Tooth Name | Location |
|---|---|---|
| A | Upper Right Second Molar | Upper right |
| B | Upper Right First Molar | Upper right |
| C | Upper Right Canine | Upper right |
| D | Upper Right Lateral Incisor | Upper right |
| E | Upper Right Central Incisor | Upper right, centre |
| F | Upper Left Central Incisor | Upper left, centre |
| G | Upper Left Lateral Incisor | Upper left |
| H | Upper Left Canine | Upper left |
| I | Upper Left First Molar | Upper left |
| J | Upper Left Second Molar | Upper left |
| K | Lower Left Second Molar | Lower left |
| L | Lower Left First Molar | Lower left |
| M | Lower Left Canine | Lower left |
| N | Lower Left Lateral Incisor | Lower left |
| O | Lower Left Central Incisor | Lower left, centre |
| P | Lower Right Central Incisor | Lower right, centre |
| Q | Lower Right Lateral Incisor | Lower right |
| R | Lower Right Canine | Lower right |
| S | Lower Right First Molar | Lower right |
| T | Lower Right Second Molar | Lower right |
Source: ADA Universal Numbering System for primary teeth
Tooth Types Reference
Tooth Types — Function and Characteristics
| Tooth Type | Number in Adult Mouth | Primary Function | Location |
|---|---|---|---|
| Incisors | 8 (4 upper, 4 lower) | Cutting and biting food | Front teeth — the 4 centre-front upper and lower |
| Canines (Cuspids) | 4 (2 upper, 2 lower) | Tearing food. Anchor point for bite | The pointed teeth at the corners — numbers 6, 11, 22, 27 |
| Premolars (Bicuspids) | 8 (4 upper, 4 lower) | Crushing and tearing. Transition between canines and molars | Two on each side upper and lower |
| Molars | 12 including wisdom teeth (6 upper, 6 lower) | Grinding and chewing. Most heavy mastication | Back teeth — first, second, and third (wisdom) molars |
Source: ADA tooth anatomy reference
Tooth Number Lookup
Click any tooth on the interactive jaw diagram to get its number, name, function, and common procedures associated with it.
Click any tooth to see its name, location, and function
MolarPremolarCanineIncisor
Click a tooth above to see its details
Frequently Asked Questions
What tooth is number 14?
Tooth number 14 in the Universal Numbering System is the Upper Left First Molar. It is located on the patient's upper left side — one of the most important chewing teeth.
What are wisdom teeth numbers?
The four wisdom teeth (third molars) are numbers 1, 16, 17, and 32 in the Universal Numbering System. Number 1 is the upper right, 16 is the upper left, 17 is the lower left, and 32 is the lower right.
Why do dentists say numbers when examining teeth?
Dentists call out tooth numbers so the dental assistant can record examination findings directly into the patient chart without requiring the dentist to stop and write. The numbers correspond to specific teeth in a standardised system so findings can be compared across visits and between providers.
What does it mean when a dentist says tooth 30?
Tooth number 30 is the Lower Right First Molar — one of the most important chewing teeth in the mouth. It is the first molar to erupt (around age 6) and is the tooth most commonly requiring root canal treatment.
What is the difference between the Universal and ISO tooth numbering systems?
The Universal system (used in the US) assigns consecutive numbers 1–32 to adult teeth in a horseshoe pattern. The FDI/ISO system (used internationally) uses a two-digit code where the first digit is the quadrant (1–4 for upper right, upper left, lower left, lower right) and the second is the tooth position (1–8 from front to back).
What tooth is a molar?
Molars are the large flat teeth at the back of the mouth used for grinding food. In the Universal System the first molars are numbers 3, 14, 19, and 30. Second molars are 2, 15, 18, and 31. Third molars (wisdom teeth) are 1, 16, 17, and 32.
How many teeth do adults have?
Adults have 32 permanent teeth including 4 wisdom teeth. If the wisdom teeth have been removed the count is 28 — which is the functional full set for most adults.
What is the most common tooth to need a root canal?
Lower first molars (teeth 19 and 30) are the most commonly root-canal-treated teeth — they bear the most occlusal force in chewing and are among the first permanent teeth to erupt making them subject to decades of wear. Upper first molars (3 and 14) are the second most common.