# Tooth numbering chart and converter: FDI, Universal and Palmer

> Click a tooth or type a tooth number: the chart shows the FDI number, the Universal number, the Palmer notation and the name of each of the 32 permanent and 20 primary teeth. Reference for dentists and dental students. Notation according to the FDI two-digit system (ISO 3950) and the ADA Universal Numbering System.

Source: https://hajto.de/en/tooth-chart  
Last updated: 2026-10-17T11:09:19Z  
German version: https://hajto.de/zahnschema.md

## How the chart is oriented

The chart shows the teeth the way a dentist looks at the patient: the patient's right side is on the left of the chart (R), the patient's left side on the right (L). The upper jaw is at the top, the lower jaw at the bottom.

## FDI two-digit notation (ISO 3950)

Every tooth has two digits. The first digit is the quadrant: 1 upper right, 2 upper left, 3 lower left, 4 lower right. Primary teeth use 5 to 8 in the same order.

The second digit counts from the midline backwards: 1 is the central incisor, 8 the third molar (wisdom tooth). Primary teeth have positions 1 to 5. Examples: 11 is the upper right central incisor, 36 the lower left first molar, 55 the upper right primary second molar.

## Universal Numbering System (ADA)

The Universal Numbering System of the American Dental Association numbers the permanent teeth 1 to 32: from 1 (upper right third molar) along the upper arch to 16 (upper left third molar), then from 17 (lower left third molar) along the lower arch to 32 (lower right third molar). The number is often written with a #, e.g. #8.

Primary teeth are lettered A to T: A (upper right primary second molar) to J (upper left primary second molar), then K (lower left primary second molar) to T (lower right primary second molar).

## Palmer notation

Palmer notation (after Zsigmondy) marks the quadrant with an angle symbol and counts from the midline in each quadrant: 1 to 8 for permanent teeth, A to E for primary teeth. The angle sits on the side of the midline and the occlusal plane, e.g. 6┘ for the upper right first molar and ┌6 for the lower left one.

As the angle symbols are hard to type, the chart also shows a text form: UR (upper right), UL (upper left), LL (lower left) and LR (lower right) with the tooth number, e.g. UR6 and LL6.

## All teeth

| FDI | Universal | Palmer | Name |
|---|---|---|---|
| [11](https://hajto.de/en/tooth-chart/tooth-11) | #8 | 1┘ (UR1) | upper right central incisor |
| [12](https://hajto.de/en/tooth-chart/tooth-12) | #7 | 2┘ (UR2) | upper right lateral incisor |
| [13](https://hajto.de/en/tooth-chart/tooth-13) | #6 | 3┘ (UR3) | upper right canine |
| [14](https://hajto.de/en/tooth-chart/tooth-14) | #5 | 4┘ (UR4) | upper right first premolar |
| [15](https://hajto.de/en/tooth-chart/tooth-15) | #4 | 5┘ (UR5) | upper right second premolar |
| [16](https://hajto.de/en/tooth-chart/tooth-16) | #3 | 6┘ (UR6) | upper right first molar |
| [17](https://hajto.de/en/tooth-chart/tooth-17) | #2 | 7┘ (UR7) | upper right second molar |
| [18](https://hajto.de/en/tooth-chart/tooth-18) | #1 | 8┘ (UR8) | upper right third molar (wisdom tooth) |
| [21](https://hajto.de/en/tooth-chart/tooth-21) | #9 | └1 (UL1) | upper left central incisor |
| [22](https://hajto.de/en/tooth-chart/tooth-22) | #10 | └2 (UL2) | upper left lateral incisor |
| [23](https://hajto.de/en/tooth-chart/tooth-23) | #11 | └3 (UL3) | upper left canine |
| [24](https://hajto.de/en/tooth-chart/tooth-24) | #12 | └4 (UL4) | upper left first premolar |
| [25](https://hajto.de/en/tooth-chart/tooth-25) | #13 | └5 (UL5) | upper left second premolar |
| [26](https://hajto.de/en/tooth-chart/tooth-26) | #14 | └6 (UL6) | upper left first molar |
| [27](https://hajto.de/en/tooth-chart/tooth-27) | #15 | └7 (UL7) | upper left second molar |
| [28](https://hajto.de/en/tooth-chart/tooth-28) | #16 | └8 (UL8) | upper left third molar (wisdom tooth) |
| [31](https://hajto.de/en/tooth-chart/tooth-31) | #24 | ┌1 (LL1) | lower left central incisor |
| [32](https://hajto.de/en/tooth-chart/tooth-32) | #23 | ┌2 (LL2) | lower left lateral incisor |
| [33](https://hajto.de/en/tooth-chart/tooth-33) | #22 | ┌3 (LL3) | lower left canine |
| [34](https://hajto.de/en/tooth-chart/tooth-34) | #21 | ┌4 (LL4) | lower left first premolar |
| [35](https://hajto.de/en/tooth-chart/tooth-35) | #20 | ┌5 (LL5) | lower left second premolar |
| [36](https://hajto.de/en/tooth-chart/tooth-36) | #19 | ┌6 (LL6) | lower left first molar |
| [37](https://hajto.de/en/tooth-chart/tooth-37) | #18 | ┌7 (LL7) | lower left second molar |
| [38](https://hajto.de/en/tooth-chart/tooth-38) | #17 | ┌8 (LL8) | lower left third molar (wisdom tooth) |
| [41](https://hajto.de/en/tooth-chart/tooth-41) | #25 | 1┐ (LR1) | lower right central incisor |
| [42](https://hajto.de/en/tooth-chart/tooth-42) | #26 | 2┐ (LR2) | lower right lateral incisor |
| [43](https://hajto.de/en/tooth-chart/tooth-43) | #27 | 3┐ (LR3) | lower right canine |
| [44](https://hajto.de/en/tooth-chart/tooth-44) | #28 | 4┐ (LR4) | lower right first premolar |
| [45](https://hajto.de/en/tooth-chart/tooth-45) | #29 | 5┐ (LR5) | lower right second premolar |
| [46](https://hajto.de/en/tooth-chart/tooth-46) | #30 | 6┐ (LR6) | lower right first molar |
| [47](https://hajto.de/en/tooth-chart/tooth-47) | #31 | 7┐ (LR7) | lower right second molar |
| [48](https://hajto.de/en/tooth-chart/tooth-48) | #32 | 8┐ (LR8) | lower right third molar (wisdom tooth) |
| [51](https://hajto.de/en/tooth-chart/tooth-51) | E | A┘ (URA) | upper right primary central incisor |
| [52](https://hajto.de/en/tooth-chart/tooth-52) | D | B┘ (URB) | upper right primary lateral incisor |
| [53](https://hajto.de/en/tooth-chart/tooth-53) | C | C┘ (URC) | upper right primary canine |
| [54](https://hajto.de/en/tooth-chart/tooth-54) | B | D┘ (URD) | upper right primary first molar |
| [55](https://hajto.de/en/tooth-chart/tooth-55) | A | E┘ (URE) | upper right primary second molar |
| [61](https://hajto.de/en/tooth-chart/tooth-61) | F | └A (ULA) | upper left primary central incisor |
| [62](https://hajto.de/en/tooth-chart/tooth-62) | G | └B (ULB) | upper left primary lateral incisor |
| [63](https://hajto.de/en/tooth-chart/tooth-63) | H | └C (ULC) | upper left primary canine |
| [64](https://hajto.de/en/tooth-chart/tooth-64) | I | └D (ULD) | upper left primary first molar |
| [65](https://hajto.de/en/tooth-chart/tooth-65) | J | └E (ULE) | upper left primary second molar |
| [71](https://hajto.de/en/tooth-chart/tooth-71) | O | ┌A (LLA) | lower left primary central incisor |
| [72](https://hajto.de/en/tooth-chart/tooth-72) | N | ┌B (LLB) | lower left primary lateral incisor |
| [73](https://hajto.de/en/tooth-chart/tooth-73) | M | ┌C (LLC) | lower left primary canine |
| [74](https://hajto.de/en/tooth-chart/tooth-74) | L | ┌D (LLD) | lower left primary first molar |
| [75](https://hajto.de/en/tooth-chart/tooth-75) | K | ┌E (LLE) | lower left primary second molar |
| [81](https://hajto.de/en/tooth-chart/tooth-81) | P | A┐ (LRA) | lower right primary central incisor |
| [82](https://hajto.de/en/tooth-chart/tooth-82) | Q | B┐ (LRB) | lower right primary lateral incisor |
| [83](https://hajto.de/en/tooth-chart/tooth-83) | R | C┐ (LRC) | lower right primary canine |
| [84](https://hajto.de/en/tooth-chart/tooth-84) | S | D┐ (LRD) | lower right primary first molar |
| [85](https://hajto.de/en/tooth-chart/tooth-85) | T | E┐ (LRE) | lower right primary second molar |

## Frequently asked questions

### What is tooth number 19?

Universal #19 is the lower left first molar. In FDI notation it is tooth 36, in Palmer notation ┌6 (LL6).

### What is tooth 36 in FDI notation?

FDI 36 is the lower left first molar, Universal #19. FDI has no tooth 19: the second digit only goes up to 8.

### Why is the input "11" ambiguous?

"11" is valid in two systems: FDI 11 is the upper right central incisor, while Universal #11 is the upper left canine (FDI 23). The converter therefore shows both readings until you pick a system.

### How are primary teeth numbered?

In FDI notation with quadrants 5 to 8 (51 to 55, 61 to 65, 71 to 75, 81 to 85), in the Universal system with the letters A to T, and in Palmer notation with A to E in each quadrant.

### How do you read Palmer notation?

The angle symbol gives the quadrant, the digit or letter the position from the midline. 6┘ (UR6) is the upper right first molar, └1 (UL1) the upper left central incisor.