바코드 데이터 용량: 각 형식이 저장할 수 있는 용량은?

Barcode Data Capacity: How Much Can Each Format Store?

Data capacity varies dramatically across barcode formats, from 8 digits in UPC-E to thousands of characters in 2D symbologies. Understanding these limits ensures you choose a format that fits your data requirements.

1D Barcode Capacities

Linear barcodes store data in a single row of bars, which inherently limits capacity. The practical maximum depends on label width and minimum X dimension:

2D Barcode Capacities

Two-dimensional codes store far more data by using both axes:

Capacity vs Practical Size

Maximum capacity rarely equals practical usage. A Data Matrix encoding 3,116 digits would be approximately 144x144 modules. At a typical X dimension of 0.25mm, that is 36mm square, which is impractical for most labels. Real-world Data Matrix symbols typically encode 20-50 characters in sizes from 10x10 to 24x24 modules.

Factors That Reduce Capacity

• Error correction level: Higher levels consume more capacity. A QR Code at Level H (30% correction) holds roughly half the data of Level L (7%)
• Character set: Binary data consumes more modules than numeric data
• GS1 overhead: Application Identifiers and FNC1 separators reduce payload space
• Symbol structure: Finder patterns, alignment patterns, and format information consume fixed capacity

Matching Capacity to Application

For most applications, you do not need maximum capacity:

• Retail products: 13 digits (EAN-13 is sufficient)
• Shipping labels: 30-48 characters (GS1-128 handles SSCC + AI data)
• Healthcare serialization: 25-35 characters (GS1 DataMatrix with GTIN + serial + lot + expiry)
• Digital links: 50-80 characters (QR Code or Data Matrix for URLs)