Check digit calculator. The last digit of a barcode number is a computer check digit which makes sure the barcode is correctly composed. Use our check digit calculator below to calculate a check digit. I have list of 65000 EAN13 Barcode numbers for which I need to calculate the check digits. does anyone know if there is an excel formula for doing this? Idealy I would like to have all the 12 digit codes in column 'A' and then in column 'B' the completed 13 digit code which have the check digit added.

Check digit calculator. The last digit of a barcode number is a computer check digit which makes sure the barcode is correctly composed. Use our check digit calculator below to calculate a check digit.