J-4
5. Subtract the result from the next higher multiple of 10.
Next higher multiple of 10 over 125 = 130
130 - 125 = 5
5
is the
Modulo-10
check character. The data to be printed
becomes:
183145899385
.
This same formula is used for EAN-13 (using the 1-12 digits) and
EAN-8 (using the 1-7 digits).
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
ends in:
UPC-E Data
Insertion Digits
Insertion
Position
10 digit code
0
abcde
0
00000
3
ab
00000
cde
1
abcde
1
10000
3
ab
10000
cde
2
abcde
2
20000
3
ab
20000
cde
3
abcde
3
00000
4
abc
00000
de
4
abcde
4
00000
5
abcd
00000
e
5
abcde
5
0000
6
abcde
0000
5
6
abcde
6
0000
6
abcde
0000
6
7
abcde
7
0000
6
abcde
0000
7
8
abcde
8
0000
6
abcde
0000
8
9
abcde
9
0000
6
abcde
0000
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
N
umber
S
ystem
C
haracter 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