Tuesday, 11 December 2012

Calculating the check digit for a UPC Barcode Company Label



The last digit of an UPC-A Barcode is a computer check digit. This is how you calculate it for your company labels
Using the above UPC-A Barcode reading 01234567891(2), which is made up of 11 digits plus a final check digit which in this case is the number 2.
The calculation is:
Step 1. Start by adding the first digit (left to right method in this case 0) with each alternate digit
i.e. in this case 0,2,4,6,8,1 = 21 and times the total by 3 = 63 (Red Group)
Step 2.  Now add the unused digits digits in this case 1,3,5,7,9, = 25 (Blue Group)
Step 3 Add the two totals in Step 1 and Step 2 together i.e. 63 + 25 = 88.
Step 4 The check digit is the smallest number when added to the result that produces a multiple of 10.
So for this Barcode the check digit is 2   i.e. 88 + 2 = 90
Now you can make sure you supply the correct number to your Graphic Designer
or simply impress your friends in the bar or pub.





UPC barcode check digit calculator 2013.

No comments:

Post a Comment