# GS1 DataBar Expanded

> Source: https://docs.barcoder.ai/docs/standards/gs1-databar-expanded
> research date 2026-06-04 · extracted at 2026-10-03
> Publisher: Barcoder — encyclopedia of QR, barcode and payment-code standards

Specifications:
- [ISO/IEC 24724:2011 — GS1 DataBar bar code symbology specification](https://www.iso.org/standard/51426.html)
- [How much data can GS1 DataBar Expanded encode? — GS1 GO](https://support.gs1.org/support/solutions/articles/43000734326-how-much-data-can-gs1-databar-expanded-and-gs1-databar-expanded-stacked-symbols-encode-)

## Overview

**GS1 DataBar Expanded** is the high-capacity, variable-length member of the [GS1 DataBar](https://docs.barcoder.ai/docs/standards/gs1-databar) family. Unlike the fixed-format GTIN-only DataBar variants, Expanded encodes a **GTIN (or Global Coupon Number) plus an arbitrary chain of GS1 Application Identifiers** — sell-by date, net weight, lot/batch number, expiration date, serial number, and so on — formatted exactly as they would be for a [Code 128](https://docs.barcoder.ai/docs/standards/code-128) / GS1-128 symbol <sup>[1][1], [2][2]</sup>. It is the DataBar variant that makes the family useful for **variable-measure retail and coupons** rather than just compact GTIN marking.

For the family history, RSS lineage, and overall positioning against [EAN-13](https://docs.barcoder.ai/docs/standards/ean-13) / [UPC-A](https://docs.barcoder.ai/docs/standards/upc-a), see the base entry [GS1 DataBar](https://docs.barcoder.ai/docs/standards/gs1-databar). This page focuses on what distinguishes **Expanded** and its multi-row sibling **Expanded Stacked**.

## History

GS1 DataBar Expanded began as **RSS Expanded** under the original AIM Reduced Space Symbology specification, renamed to GS1 DataBar Expanded when GS1 adopted and rebranded the family in 2007 <sup>[3][3]</sup>. It is standardised in **ISO/IEC 24724** (current edition 2011) alongside the other DataBar variants <sup>[4][4]</sup>.

The variant's defining milestone is the **US retail coupon mandate**: GS1 DataBar Expanded Stacked became the US industry standard coupon barcode, with an interim transition from 2007, the stand-alone phase from 2011, and a hard cut-over on **30 June 2015** <sup>[3][3]</sup>. See [GS1 DataBar](https://docs.barcoder.ai/docs/standards/gs1-databar) for the full coupon-migration timeline.

## Technical specification

**Variable-length, triplet-based structure** <sup>[1][1]</sup>:

- The symbol is built from **one to eleven "triplet" sequences**, each consisting of a **finder pattern followed by two symbol characters** (the final triplet may carry a single character for odd character counts).
- Each **data character is 17 modules wide** (four bars, four spaces); each **finder pattern is 15 modules wide** <sup>[1][1]</sup>.
- Because the length varies with the encoded data, the full symbol ranges from **53 to 543 modules wide** <sup>[1][1], [5][5]</sup>.
- Error detection uses a **modulo 211 (mod 211)** check character <sup>[1][1]</sup>.
- Left and right guard patterns bound the symbol; despite being part of a family that splits into omni/non-omni variants, single-row Expanded **can be read omnidirectionally** when printed at full height <sup>[1][1]</sup>.

**Data capacity** <sup>[2][2], [5][5], [6][6]</sup>:

- **Up to 74 numeric digits**, or
- **Up to 41 alphanumeric characters**, in a single row.

**Character set** <sup>[1][1]</sup>: numerals, upper- and lower-case letters, the **FNC1** function character (the GS1 AI delimiter), plus punctuation and spaces.

**GS1-128 data equivalence** <sup>[1][1], [2][2]</sup>: the data stream encoded into Expanded must be a valid GS1 Application Identifier element string — **formatted identically to what would go into a GS1-128 symbol**. This is the structural property that lets Expanded carry `(01)` GTIN, `(310n)` net weight, `(15)` best-before, `(17)` expiry, `(21)` serial, etc. It also supports **GCN** (Global Coupon Number) and **SSCC-18** structures <sup>[1][1]</sup>.

**Expanded Stacked** <sup>[2][2], [6][6]</sup>:

- Same data capacity and AI semantics as single-row Expanded, but the symbol is **broken into up to 11 stacked rows** to fit a narrower footprint.
- This is the form used for **US retail coupons**, where multiple AIs (manufacturer prefix, offer code, expiry, serial, household ID) must fit on a small coupon face.

## Use cases

- **Variable-measure retail** — deli, butcher, fish counter, and catch-weight protein: an in-store scale prints an Expanded symbol carrying **GTIN + net weight + price**, read at standard POS without manual entry <sup>[2][2]</sup>.
- **US retail coupons** — **Expanded Stacked** is the canonical US coupon barcode since 30 June 2015, carrying the full multi-AI coupon payload <sup>[3][3]</sup>.
- **Fresh food with attributes** — where a label must carry a best-before or lot number in addition to the GTIN, which the GTIN-only DataBar variants cannot do <sup>[2][2]</sup>.
- **Small-package multi-AI marking** generally, anywhere [Code 128](https://docs.barcoder.ai/docs/standards/code-128) / GS1-128 is too wide but the data is richer than a bare GTIN <sup>[2][2]</sup>.

## Implementations

- **C / C++** — [zint/zint][zint] — ~771★, active 2026. `libzint` encodes GS1 DataBar Expanded and Expanded Stacked (public-domain symbology, BSD-licensed library) <sup>[7][7]</sup>.
- **Java + ports** — [zxing/zxing][zxing] — ~34 000★, active 2025. Decodes the DataBar family including Expanded.
- **Reporting / label software** — Seagull BarTender, Neodynamic, Cognex symbology stacks document and generate Expanded and Expanded Stacked, including CC-A / CC-B 2D composite variants <sup>[1][1], [5][5]</sup>.
- **In-store scales** — Mettler Toledo, Bizerba, Avery Berkel, Digi generate Expanded for variable-measure pricing (see [GS1 DataBar](https://docs.barcoder.ai/docs/standards/gs1-databar)).

## Comparison

**vs. other [GS1 DataBar](https://docs.barcoder.ai/docs/standards/gs1-databar) variants** — Expanded is the **only** DataBar variant that carries Application Identifiers beyond the GTIN; Omnidirectional, Stacked Omnidirectional, Truncated, Stacked, and [GS1 DataBar Limited](https://docs.barcoder.ai/docs/standards/gs1-databar-limited) all encode a fixed 14-digit GTIN only <sup>[2][2], [6][6]</sup>. Expanded is variable-length (53–543 modules); the GTIN-only variants are fixed-width.

**Expanded vs. Expanded Stacked** — identical capacity and AI semantics; Stacked trades horizontal width for up to 11 rows of vertical space. Single-row Expanded suits wide labels; Expanded Stacked suits coupons and narrow faces <sup>[2][2], [6][6]</sup>.

**vs. [GS1 DataBar Stacked](https://docs.barcoder.ai/docs/standards/gs1-databar-stacked)** (Stacked Omnidirectional) — Stacked Omnidirectional is a compact two-row **GTIN-only** POS symbol; it cannot carry weight, expiry, or coupon AIs. Use Expanded when attributes are required <sup>[6][6]</sup>.

**vs. [Code 128](https://docs.barcoder.ai/docs/standards/code-128) / GS1-128** — Expanded encodes the **same AI element strings** as GS1-128 but in a smaller, POS-readable footprint. GS1-128 dominates shipping/outer-pack; Expanded dominates retail variable-measure and coupons.

**vs. [EAN-13](https://docs.barcoder.ai/docs/standards/ean-13) / [UPC-A](https://docs.barcoder.ai/docs/standards/upc-a)** — EAN/UPC encode only a GTIN with no attributes; Expanded adds the full AI chain in comparable or smaller space. EAN/UPC retain the general-packaging installed base.

**vs. [Data Matrix](https://docs.barcoder.ai/docs/standards/data-matrix) (GS1 DataMatrix)** — the 2D alternative carries more data in less area but needs an imager; Expanded keeps the data 1D-laser-readable. Both coexist under GS1's 2D migration roadmap.

## Fun facts

The deli-counter "weigh, label, scan, charge" loop runs on Expanded: a single symbol carries GTIN, weight and price so the front-of-store POS rings up a variable price with no keystrokes — the operational reason Expanded exists <sup>[2][2]</sup>.

Despite "Expanded Stacked" being limited to 11 rows, the same AI payload that fills a wide single-row Expanded compresses into that block — which is why a tiny manufacturer coupon can still carry a household identifier, offer code, expiry and serial all at once <sup>[2][2], [6][6]</sup>.

## Status

**Active.** Standardised in ISO/IEC 24724:2011, public domain, universally supported by post-2012 POS scanners <sup>[4][4]</sup>. Expanded Stacked is the entrenched US coupon barcode; single-row Expanded is entrenched in variable-measure retail. GS1's broader 2D migration roadmap (see [GS1 DataBar](https://docs.barcoder.ai/docs/standards/gs1-databar)) may slow new adoption, but no deprecation is planned <sup>[2][2]</sup>.

## Sources

[1]: https://barcodeguide.seagullscientific.com/Content/Symbologies/DataBar_Expanded.htm
[2]: https://support.gs1.org/support/solutions/articles/43000734326-how-much-data-can-gs1-databar-expanded-and-gs1-databar-expanded-stacked-symbols-encode-
[3]: https://en.wikipedia.org/wiki/GS1_DataBar
[4]: https://www.iso.org/standard/51426.html
[5]: https://www.neodynamic.com/barcodes/GS1-DataBar-Expanded-CC-A-and-CC-B-Composite-Barcodes.aspx
[6]: https://www.gs1.org/standards/barcodes/databar
[7]: https://github.com/zint/zint
[zint]: https://github.com/zint/zint
[zxing]: https://github.com/zxing/zxing

1. [GS1 DataBar Expanded — Seagull Scientific Barcode Guide][1]
2. [How much data can GS1 DataBar Expanded encode? — GS1 GO Customer Service][2]
3. [GS1 DataBar — Wikipedia][3]
4. [ISO/IEC 24724:2011 — GS1 DataBar symbology specification — ISO][4]
5. [GS1 DataBar Expanded CC-A/CC-B Composite — Neodynamic][5]
6. [GS1 DataBar barcodes — GS1][6]
7. [zint/zint — GitHub][7]

## Deployments

_No country reports mention this standard by name._

## Regions / aggregations not mapped to a single country

- Universal