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UPC check digit calculator

Enter the first 11 UPC-A digits to calculate the twelfth. Enter all 12 digits to validate the final digit before generating the symbol.

01 / One barcode

Barcode formatValue

Bar width (px)Height (px) Show value

Format for all rowsPaste one value per line

or import a CSV · first column: value, second: optional label

Choose CSV file

Add values to build your label sheet.

Print at 100% / actual size. To export a PDF, choose “Save as PDF” in the browser print dialog.

PaperLayoutExtra page offset (mm)

Avery 5160: 2⅝ × 1 in labels on US Letter, 3 columns × 10 rows. Page offset shifts the sheet from the template origin; see print notes below.

For 03600029145, alternating weights from the right give a sum of 58; the next multiple of ten is 60, so the check digit is 2.

A check digit catches many typing errors but does not check GS1 ownership, uniqueness, or whether a seller may use the GTIN.

Barcode artwork is not proof of an assigned GS1 number. A free barcode image and a GS1-issued GTIN are different things.