When you have received your certificate with your company prefix and decided what type of barcode you will use, you can start to calculate the numbers themselves. You use our page “calculate check digit” to calculate your numbers.
Calculate check digit ›
The structure consists of a combination of digits and letters. For a series of 1,000 numbers, for example, the structure looks like this:
FFFFFFFFF – is your company prefix which must be part of all barcode numbers you create.
AAA – is a sequence number. You decide this yourself. It can be anything from 000 to 999. We recommend that you number sequentially, i.e. 001, 002, 003 and so on. It is important that you keep track of the sequence numbers you have used since this is not something we register.
K – is a check digit that you calculate on our website. You cannot choose the check digit, it must be calculated. You can also calculate the check digit when you are logged in to MyGS1. Note that you must calculate the new check digit for every new barcode number you create.