Check
Digit Calculator 
Calculate the check digit
The
symbol "Na" in the check digit area indicates that
something other than numbers have been used and it is
not valid. 
Calculate EAN8 Check Digit 

Type
in the first 7 digits for EAN8 and the check digit if known Only numbers from 0 to 9 can be used in the empty fields. 

Calculate EAN13 Check Digit 

Type
in the first 12 digits for EAN13 and the check digit if
known Only numbers from 0 to 9 can be used in the empty fields. 

Calculate UPCA Check Digit 

Type
in the first 11 digits for UPCA and the check digit if
known Only numbers from 0 to 9 can be used in the empty fields. 

Calculate TradeUnit Check Digit 

Type
in the first 13 digits for TradeUnit and the check digit
if
known Only numbers from 0 to 9 can be used in the empty fields. 
