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

Serial Shipping Container Code (SSCC)

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