UPC Barcode Generator

Turn a 12-digit UPC into a print-ready UPC-A barcode. Enter the first 11 digits and the check digit is calculated, or paste all 12 and it's verified.

Barcode type

Code 128EAN-13UPC-AEAN-8Code 39

Data to encode11 digits (check digit added) or 12 digits (check digit verified).

Encoded 036000291452 · Number system 0 · check digit 2 (calculated) · 226×122px

Download SVGDownload PNG1× (226px)2× (452px)4× (904px)8× (1808px)Copy SVG code

Size, text and colors

Bar width (px per module)2Bar height90pxText size16px

Human-readable textQuiet zone

Bars

Background

Transparent

🔒 Encoded and drawn in your browser — no uploads, no watermark, free for commercial use.

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How to create a UPC barcode

1. Enter your 11-digit UPC (company prefix + item number), or all 12 digits.
2. Fix any error shown — usually a wrong check digit or a typo.
3. Keep human-readable text on; retail packaging normally shows the digits.
4. Download SVG for your packaging artwork, or PNG at high resolution.

How the UPC check digit is calculated

1. Add the digits in the odd positions (1st, 3rd … 11th) and multiply by 3.
2. Add the digits in the even positions (2nd, 4th … 10th).
3. Add both results. The check digit is the amount needed to reach the next multiple of 10.

Example for 03600029145: odd positions 0+6+0+2+1+5 = 14, × 3 = 42; even positions 3+0+0+9+4 = 16; 42 + 16 = 58, so the check digit is 2 and the full UPC is 036000291452.

Anatomy of a UPC-A

The 12 digits are a GS1 company prefix (6–10 digits), an item reference, and the check digit. The first digit is the number system: 0, 1, 6, 7, 8 for regular products, 2 for variable-weight items like meat and produce, 3 for drugs (NDC), 4 for in-store use and 5 for coupons. The symbol is 95 modules wide: start guard, six digits, centre guard, six digits, end guard.

Where do UPC numbers come from?

To sell in most retail stores and on Amazon you need numbers licensed from GS1 (GS1 US in the United States), which guarantees your company prefix is unique. Resold “cheap UPCs” often fail retailer validation. For internal use — inventory in your own warehouse — any number works, though Code 128 is usually a better fit.

Related tools

• EAN-13 Barcode Generator
• Barcode Generator
• Code 128 Barcode Generator