UPC-A (GTIN-12) Barcode Specifications
The UPCA barcode option is specified in IDAutomation Barcode Fonts, Components and Applications to create a UPC-A barcode, which is a symbology that is most commonly used to encode 12 digits of the GTIN.The 12th digit of UPCA is a MOD10 check digit that is re-calculated in all IDAutomation barcode products to reduce scanning errors, and may be omitted when encoding data. A 2 or 5 digit add-on may be created by appending the numbers to the end of the 11 or 12 digits that make up the primary symbol. Therefore, a number string of 11, 12, 13, 14, 16 or 17 digits (with or without a check digit) must make up the DataToEncode.
- Using the UPCA barcode option with a font encoder returns text formatted to the UPC-A Barcode Fonts.
- The UPCA barcode option in all components and applications will produce a barcode image.
- Entering incorrect data may create a barcode containing all zeros in some products.
Fig. 1. UPC-A barcode encoding "123456789012" with an add-on of
"12345".
The above UPC-A barcode symbol was generated with the
Barcode Image Generator.
A free online
barcode generator is also available.
The UPC-A barcode type may be easily read and verified with the IDAutomation USB Barcode Scanner.
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