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Specifications | Ean 13 symbology specification

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Saturday September 14 2013

EAN 13 BARCODE

Format of the EAN 13

Length Type checksum

13 digits numeric yes

The EAN 13 is com posed by 12 data digits + 1 checksum digit.

Calculating the EAN 13 checksum

Calculating the EAN 13 checksum digit is very sim ple :

The digit are used from right to left

Calculate the sum of the numbers of odd and even positions

Odd : 1 + 3 + 5 + 7 + 9 + 1 = 26Even : 2 + 4 + 6 + 8 + 2 = 22

EAN 13 checksum formula :

( 10 - [ (3 * Odd + Even) modulo 10 ] ) modulo 10

Thus, the example :

(10 - [ (3 * 26 + 22) module 10 ] ) modulo 10

(10 - [ (78 + 22) module 10 ] ) modulo 10

(10 - [ (100) module 10 ] ) modulo 10

(10 - [ 0 ] ) modulo 10

(10 - 0) modulo 10

10 modulo 10

0

So the checksum of 210987654321 is 0

EAN 13 checksum generator :

EAN 13 mess age : Checksum :

Binary sequence of EAN 13 barcode

Start

A start sequence s tarts the barcode : 101

The 13 digits will be s eparated into 2 parts, nam ely the left part from the 1st au 7 th digit and the right part from the

8th au 13th digit

Part #1

The first part is encoded according to the following table :

digit sequence

0 000000

1 001011

2 001101

3 001110

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4 010011

5 011001

6 011100

7 010101

8 010110

9 011010

Thus for each bit of the first digit, a sequence of 6 "0" or "1" will be used to encode the 6 next digits according to the

following tables :

digit table 0 table 1

0 0001101 0100111

1 0011001 0110011

2 0010011 0011011

3 0111101 01000014 0100011 0011101

5 0110001 0111001

6 0101111 0000101

7 0111011 0010001

8 0110111 0001001

9 0001011 0010111

For example, the first digit is 2, the tables used for the digit 2 to 7 will be defined by the sequence 001101:

The "1" will result from table "0"

The "0" will result from table "0"

The "9" will result from table "1"

...

Part #1 will be0011001 0001101 0010111 0001001 0111011 0000101

Intermediate

An intermedi ate sequence s epara te the 2 parts : 01010

Part #2

The second pa rt is encoded according to the following table :

digit table 2

0 1110010

1 1100110

2 1101100

3 1000010

4 1011100

5 1001110

6 1010000

7 1000100

8 1001000

9 1110100

Part #2 will be 1001110 1011100 1000010 1101100 1100110 1110010

Stop

A stop s equence ends the barcode : 101

Summary of the sequence of the EAN 13

start : 101

part #1

center : 01010

part #2

stop : 101

Graphical representation of the EAN 13 barcode

Each element of the binary sequence is represented by a space of equal width, it is a "1" or "0". The "1" are

represented by spaces filled and "0" with empty spaces.

Online EAN 13 barcode generator

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Please fill in the code : 210987654321

2109876543210

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