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What Is a GTIN-14?
GTIN-14 is the 14-digit number on the side of every shipping carton. It identifies what's inside the case, not the individual product.
GTIN-14 is the 14-digit member of the GS1 GTIN family — the format used to identify a logistics unit (a case, carton, or inner pack of multiple retail units). Where GTIN-12 (UPC-A) identifies one retail unit (a single can of soda), GTIN-14 identifies the case of 24 cans shipped together. The barcode format that physically renders a GTIN-14 is ITF-14 (Interleaved 2 of 5), the wide-bar code you see on the side of cardboard shipping boxes.
GTIN-14 has a special structural feature absent in shorter GTINs: the 'indicator digit' (the first digit). Indicator digit 0 means 'this case contains units with a GTIN-12 identifier' (a regular UPC product). Indicator digits 1-8 are assigned at the manufacturer's discretion to identify different pack quantities — a case of 12 might be indicator 1, a case of 24 might be indicator 2. Indicator 9 is reserved for variable-measure products (meat, produce sold by weight).
GTIN-14 structure: indicator + GTIN + check digit
14 digits broken into three parts. Digit 1: indicator digit (0-9). Digits 2-13: the underlying GTIN of the contained unit, zero-padded if shorter than 12 digits. Digit 14: Mod 10 check digit, computed from the first 13 using the standard GS1 formula. Example: GTIN-12 (UPC) for a Coke can is 049000028911 (drop leading zero). Case of 24: GTIN-14 = '2' (indicator) + '0049000028911' (zero-padded GTIN-12) + check digit. The case GTIN-14 is a DIFFERENT number from the unit's GTIN-12 — never share them.
How GTIN-14 differs from GTIN-12 and GTIN-13
GTIN-12 (UPC-A): 12 digits, identifies a retail consumer unit, scanned at point-of-sale. GTIN-13 (EAN-13): 13 digits, same purpose globally. GTIN-14: 14 digits, identifies the shipping carton or inner pack. Internal retailer systems STORE every GTIN as 14 digits with zero-padding — so a UPC-A 049000028911 gets stored as 00049000028911 in Walmart's inventory database. The 14-digit storage convention is why some retailers refer to all GTINs as 'GTIN-14' even when talking about retail units.
ITF-14 is the barcode format that renders a GTIN-14
ITF-14 (Interleaved 2 of 5) is the physical barcode format. It's tall (1.25 inches typical), wide (about 5 inches at 100% scale), and uses thick bars designed for scanning at 90 degrees through corrugated cardboard distortion. The visible 'box' around the bars is the 'bearer bar' — required by GS1 spec to prevent partial scans from cardboard creases. Most cases ship with TWO ITF-14 barcodes on opposite sides so receiving scanners can read regardless of orientation on the pallet.
When you need a GTIN-14
You need GTIN-14 + ITF-14 if you sell at retail in case quantities — Walmart Marketplace cartons, Costco bulk packs, Sam's Club, Home Depot, any wholesaler distribution. The GTIN-14 is required on the case in addition to the GTIN-12 UPC on each individual retail unit inside. You do NOT need GTIN-14 if you sell only individual units direct-to-consumer (Shopify, e-commerce, Amazon FBA non-master-pack inventory). The threshold: are you shipping pallets of cased product to a retailer's distribution center? If yes, GTIN-14.
FAQ
What is GTIN-14?
A 14-digit GTIN that identifies a logistics unit (case, carton, or inner pack) containing multiple retail units. Rendered physically as an ITF-14 barcode on the side of shipping cartons. The first digit is an 'indicator digit' chosen by the manufacturer to distinguish different pack quantities — e.g., indicator 1 for a 12-pack, indicator 2 for a 24-pack of the same underlying product.
Is a GTIN-14 the same as an ITF-14?
GTIN-14 is the NUMBER (14 digits). ITF-14 is the BARCODE FORMAT (Interleaved 2 of 5) that renders that number visually. Same data, different layers — like the difference between '1234567890' the phone number and the way it's printed on a business card.
How do I convert UPC-A to GTIN-14?
Two steps. Step 1: prepend two zeros to the 12-digit UPC. Step 2: prepend an indicator digit (0 for the same unit, 1-8 for case packs). Example: UPC-A 012345678905 → GTIN-14 0012345678905 (still 13 digits — that's GTIN-13). To make a true case GTIN-14: choose indicator digit '2' → '2' + '01234567890' + recompute check digit. The check digit changes because the digit positions shift.
Where does GTIN-14 appear on a product?
Almost always on the OUTER shipping carton, never on the retail unit itself. The individual product (the can, box, bottle) carries its GTIN-12 UPC. The corrugated case of 24 units carries the GTIN-14 ITF-14. Pallets of multiple cases carry an SSCC (separate identifier) and sometimes also the case GTIN-14 on the pallet label.
Do I need a separate GTIN-14 for every case size?
Yes. A 12-pack of your product and a 24-pack of the same product need DIFFERENT GTIN-14s, distinguished by the indicator digit. This is how retailer ordering systems differentiate between case configurations — Walmart needs to order a specific case quantity, not 'some unspecified case'. Indicator digits 1-8 let you label up to 8 distinct case configurations from a single underlying product GTIN-12.
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