Universal Product Code, or UPC bar codes, are used for tracking products or trade items in stores. The code is used many countries, including the United States and Canada. The issuance and use of UPC bar code is controlled worldwide by a non-profit organisation called GS1. Getting a product bar code involves applying to GS1 for a company prefix number, and attaching it to your product's stock number.
Visit the GS1 US website. Look at the drop-down menu under the "Barcodes and Ecom" tab on the top menu bar. Click on "I Need A U.P.C. Barcode."
Click on "Apply." Fill out the form and follow onscreen prompts. Pay the required fees.
Click on the "Barcodes and Ecom" tab. Click on "Getting Started" and click "How to Create a U.P.C. Barcode" in the pop-up menu. Click "Step 1: Build my GTIN for my U.P.C. Barcodes," and enter your UPC Company Prefix in the space provided exactly as it appears on your GS1 Company Prefix certificate.
Assign a 4-digit stock number to the product. Type the number into the space provide. Click "Continue" to generate the complete bar code number.