Printer User Manual

UPC-A and UPC-E Barcodes

Programmer Reference Guide U26169-J-Z716-1-7600

Example of check digit calculation

UPC-A and UPC-E

The number of characters in the UPC-A and UPC-E codes is fixed and is eight digits for

UPC-E and twelve digits for UPC-A. The border and separator characters are automatically

generated by the printer.

UPC-A

The UPC-A code has the following layout:

– One digit as the system identifier

0 = Standard consumer goods

2 = Goods marked in-store

3 = Pharmaceutical and medical supplies

5 = Coupons

– Five digits for the manufacturer number

– Five digits for the product number

One check digit

Plain text :123456741

Plain text w/o check digit : 1 2 3 4 5 6 7 4

Check digit : 1

New number generated from odd positions : 2 4 6 4

Multiplied by 2 : 2464 x 2 = 4928

Sum of digits : 4 + 9 + 2 + 8 = 23

Sum of the even positions of the original number

and sum from the last step : 1 + 3 + 5 + 7 + 23 = 39

Modulo 10 : 39 mod 10 = 9 (39/1110 = 3, rem. 9)

Difference from 10 is the check digit : 10 - 9 = 1

Check digit : 1