Worth Data P11/12 user manual UPC-E Checksum Calculation, 01234500006, 01234565

UPC-E Checksum Calculation

Use the sample data of 123456 to demonstrate the UPC-E checksum calculation:

1.The 6 digit UPC-E code is converted to a 10-digit code, using an expansion scheme based on the sixth digit:

If the code	UPC-E data	Insertion digits	Insertion	10 digit code
ends in:			Position
0	abcde0	0 0 0 0 0	3	ab 0 0 0 0 0 cde
1	abcde1	1 0 0 0 0	3	ab1 0 0 0 0 cde
2	abcde2	2 0 0 0 0	3	ab2 0 0 0 0 cde
3	abcde3	0 0 0 0 0	4	abc0 0 0 0 0 de
4	abcde4	0 0 0 0 0	5	abcd 0 0 0 0 0 e
5	abcde5	0 0 0 0	6	abcde 0 0 0 0 5
6	abcde6	0 0 0 0	6	abcde 0 0 0 0 6
7	abcde7	0 0 0 0	6	abcde 0 0 0 0 7
8	abcde8	0 0 0 0	6	abcde 0 0 0 0 8
9	abcde9	0 0 0 0	6	abcde 0 0 0 0 9

Because the sample UPC-E code ends in a 6, the insertion digits 0000 are inserted at the sixth digit (insertion position 6):

1234500006

2.Add the Number System Character of 0 to the sample data:

01234500006

3.Use the UPC-A check digit calculation described in the previous section to produce a check digit as if it were a UPC-A code. The check digit for the sample data is:

5

4.The complete 8 digit code consists of the Number System Character, the original 6 digit code and the check digit:

01234565

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