What happens if I only enter 11 digits into the UPC-A generator?

When you enter an 11-digit company prefix and item reference, ZPL Bench automatically calculates and appends the 12th Modulo 10 check digit. If you enter all 12 digits, the preflight engine verifies the check digit and blocks export if a typo is detected.

Can I print UPC-A labels onto standard 30-up address label sheets?

Yes. Enable Batch CSV Mode or enter your quantities, select Avery 5160 (2.625" × 1.0") under Sheet Imposition Mode, click "Apply cell size", and export a print-ready US Letter PDF.

horizontal physical ruler · mm

3 mm layout guide

101.6 mm

813 × 1219 dots / 8 dpmm

Print checks

Encoding & geometry passed

1 encoded symbols / 0 warnings / 0 engine errors

Check Digit Status

PASS (Calculated Check Digit: 2)

Validation is recalculated from the current source. Invalid identifiers do not produce a symbol.

Quiet Zone Clearance

PASS (Min margin: 33.0 mm)

Required L/R/T/B: 3.38 / 3.38 / 3.00 / 3.00 mm. Includes 3 mm layout clearance and symbology module minima.

left	33.00 mm / guide 30.00
right	33.00 mm / guide 30.00
top	51.75 mm / guide 48.75
bottom	80.75 mm / guide 77.75

Effective DPI	203.2
Dot pitch	0.1250 mm
Raster width	813 dots
Raster height	1219 dots

Technical specifications

UPC-A retail specifications
Parameter	Specification
Symbology Structure	12-digit UPC-A (11 payload digits + 1 GS1 Modulo 10 check digit; 95 modules total)
Check Digit Rule	Odd positions × 3 + Even positions × 1; (10 - (sum mod 10)) mod 10
Retail Tag Fields	Optional product description header and formatted USD price callout
Guard Bar Geometry	Standard left, center, and right guard patterns extending 5 modules below data bars

Parameter

Specification

Symbology Structure

12-digit UPC-A (11 payload digits + 1 GS1 Modulo 10 check digit; 95 modules total)

Check Digit Rule

Odd positions × 3 + Even positions × 1; (10 - (sum mod 10)) mod 10

Retail Tag Fields

Optional product description header and formatted USD price callout

Guard Bar Geometry

Standard left, center, and right guard patterns extending 5 modules below data bars

Printer settings use 8 / 12 / 24 dots per millimeter. Nominal 203 / 300 / 600 DPI names correspond to effective 203.2 / 304.8 / 609.6 DPI device grids. Screen dimensions use the CSS reference of 96 px/in.

Operating procedure

Enter an 11-digit payload to calculate the final check digit, or a complete UPC-A to verify it.

Configure the retail caption, USD price, printer grid, and label stock.

Review the UPC-A guard bars and preflight status before exporting PDF, PNG, SVG, ZPL, or a sheet.

Preflight validates supported identifiers and geometry; it does not certify scanner grades. Fix every red error before exporting.

Frequently asked questions

Tools

Pages

Navigation

UPC-A Barcode Generator & Retail Price Label Maker

Print checks

Check Digit Status

Quiet Zone Clearance

X-Dimension

Printhead Dot Alignment

Element Bounds

Technical Specifications & Implementation Guide

Technical specifications

Operating procedure

Frequently asked questions