Phiên bản mã QR 30 (137×137)
QR version 30 is 137×137 modules: up to 4,158 digits, 2,520 alphanumeric, 1,732 bytes or 1,066 kanji at level L; 742 bytes at H.
Version 30 data capacity
Maximum characters in a single encoding mode, per error-correction level (ISO/IEC 18004:2015, Table 7). Mixed-mode data and ECI headers reduce these limits.
| EC level | Recovers | Số | Chữ và số | Byte | Kanji |
|---|---|---|---|---|---|
| L | ~7% | 4158 | 2520 | 1732 | 1066 |
| M | ~15% | 3289 | 1994 | 1370 | 843 |
| Q | ~25% | 2358 | 1429 | 982 | 604 |
| H | ~30% | 1782 | 1080 | 742 | 457 |
Codewords and error-correction blocks
The symbol carries 2185 codewords in total, split between data and Reed-Solomon error correction (ISO/IEC 18004:2015, Table 9).
| EC level | Data codewords | EC codewords | Blocks (count × total, data, EC codewords) |
|---|---|---|---|
| L | 1735 | 450 | 5 × (145, 115, 30) + 10 × (146, 116, 30) |
| M | 1373 | 812 | 19 × (75, 47, 28) + 10 × (76, 48, 28) |
| Q | 985 | 1200 | 15 × (54, 24, 30) + 25 × (55, 25, 30) |
| H | 745 | 1440 | 23 × (45, 15, 30) + 25 × (46, 16, 30) |
Symbol structure
- Mô-đun
- 137 × 137
- Data modules (codeword bits + remainder bits)
- 17483
- Remainder bits
- 3
- Alignment patterns
- 33 (centre rows/columns 6, 26, 52, 78, 104, 130)
- Version information blocks
- Yes (2 × 18 bits)