﻿ Barcode & XML/EDI Standards

GS1 Identification Numbers

Field 14 digits(*)
GTIN-8
GTIN-12
GTIN-13
GTIN-14
(*) In databases, GS1 identification numbers must be placed right justified in a 14 digit field

SSCC

Tips:

How is the check digit calculated?
Example of a check digit calculation for the 13 digit field

Detailed explanation on how the check digit is calculated:

 Digit positions GTIN-8 N1 N2 N3 N4 N5 N6 N7 N8 GTIN-12 N1 N2 N3 N4 N5 N6 N7 N8 N9 N10 N11 N12 GTIN-13 N1 N2 N3 N4 N5 N6 N7 N8 N9 N10 N11 N12 N13 GTIN-14 N1 N2 N3 N4 N5 N6 N7 N8 N9 N10 N11 N12 N13 N14 SSCC N1 N2 N3 N4 N5 N6 N7 N8 N9 N10 N11 N12 N13 N14 N15 N16 N17 N18 Multiply value of each position by x3 x1 x3 x1 x3 x1 x3 x1 x3 x1 x3 x1 x3 x1 x3 x1 x3 Accumulated results = Sum Substract the sum value of last digit from 10 = Check Digit

Detailed explanation on how the check digit is calculated:

Example of a check digit calculation for the 13 digit field
 Positions N1 N2 N3 N4 N5 N6 N7 N8 N9 N10 N11 N12 N13 Number without check digit 6 2 9 1 0 4 1 5 0 0 2 1 Step 1: Multiply x x x x x x x x x x x x by 1 3 1 3 1 3 1 3 1 3 1 3 Step 2: Add up = = = = = = = = = = = = results to sum 6 6 9 3 0 12 1 15 0 0 2 3 = 57 Step 3: Substract the sum value of the last digit (7) from 10 = Check Digit (3) Number with check digit 6 2 9 1 0 4 1 5 0 0 2 1 3