| ID Key Format |
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 |
| Step 1: Multiply value of each position by |
|
x3 |
x1 |
x3 |
x1 |
x3 |
x1 |
x3 |
x1 |
x3 |
x1 |
x3 |
x1 |
x3 |
x1 |
x3 |
x1 |
x3 |
|
| Step 2: Add results together to create sum |
| Step 3: Subtract the sum from nearest equal or higher multiple of ten = Check Digit |
The following table gives an example to illustrate how a GTIN-13 Check Digit is calculated:
| 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 results |
= |
= |
= |
= |
= |
= |
= |
= |
= |
= |
= |
= |
- |
| to create sum |
6 |
6 |
9 |
3 |
0 |
12 |
1 |
15 |
0 |
0 |
2 |
3 |
=57 |
| Step 3: Subtract the sum from nearest equal or higher multiple of ten = 60- 57 = 3 (Check Digit) |
| Number with Check Digit |
6 |
2 |
9 |
1 |
0 |
4 |
1 |
5 |
0 |
0 |
2 |
1 |
3 |
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