GTIN-8
7 body digits; 8 including the check digit.
Open this formatGS1 Mod-10 utility
Apply the GS1 Mod-10 algorithm step by step
See the alternating 3 and 1 weights, each product, the weighted sum, remainder and final complement to ten.
Calculator
GS1 Mod-10 check digit
Supported formats
Exact lengths, one shared rule
GTIN, GLN and SSCC use the same GS1 Mod-10 arithmetic but have different required lengths. CheckDigit validates the length before calculating.
GTIN-12 / UPC-A
11 body digits; 12 including the check digit.
Open this formatGTIN-13 / EAN-13
12 body digits; 13 including the check digit.
Open this formatGTIN-14
13 body digits; 14 including the check digit.
Open this formatGLN-13
12 body digits; 13 including the check digit.
Open this formatSSCC-18
17 body digits; 18 including the check digit.
Open this format