Barcode Tools · UPC-A

UPC-A generator.

Enter your 11-digit code and we'll auto-calculate the check digit, then produce a scannable 12-digit UPC-A barcode for retail products in the US and Canada.

Inputs

UPC-A barcode

Enter 11 digits and press Generate.

How the UPC-A check digit is calculated

Sum the digits in odd positions (1, 3, 5, 7, 9, 11) and multiply by 3.
Sum the digits in even positions (2, 4, 6, 8, 10).
Add both sums together.
The check digit is the smallest number that, added to the total, makes a multiple of 10.

UPC-A facts

UPC-A is the standard retail barcode in the US and Canada.
It is fixed at 12 digits — 11 of your choice plus 1 calculated check digit.
Print at 100% scale (37.29 mm wide) or above for reliable retail scanning.