How do I calculate a control digit?
The last digit of the barcode number is a control digit that ensures that the barcode has been compiled correctly. Use our control digit calculator below to calculate a check digit.
GTIN control digit calculation
| Key Format | Number (without the control digit) | GTIN Format | |
|---|---|---|---|
| GTIN-8 | |||
| GTIN-12 | |||
| GTIN-13 | |||
| GTIN-14 |
GLN control digit calculation
| Key Format | Number (without the control digit) | GLN Format | |
|---|---|---|---|
| GLN |
SSCC control digit calculation
| Key Format | Number (without the control digit) | SSCC Format | |
|---|---|---|---|
| SSCC |