QR Code Version 31 (141×141)
QR version 31 is 141×141 modules: up to 4,417 digits, 2,677 alphanumeric, 1,840 bytes or 1,132 kanji at level L; 790 bytes at H.
Version 31 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 | Numeric | Alphanumeric | Byte | Kanji |
|---|---|---|---|---|---|
| L | ~7% | 4,417 | 2,677 | 1,840 | 1,132 |
| M | ~15% | 3,486 | 2,113 | 1,452 | 894 |
| Q | ~25% | 2,473 | 1,499 | 1,030 | 634 |
| H | ~30% | 1,897 | 1,150 | 790 | 486 |
Codewords and error-correction blocks
The symbol carries 2323 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 | 1,843 | 480 | 13 × (145, 115, 30) + 3 × (146, 116, 30) |
| M | 1,455 | 868 | 2 × (74, 46, 28) + 29 × (75, 47, 28) |
| Q | 1,033 | 1,290 | 42 × (54, 24, 30) + 1 × (55, 25, 30) |
| H | 793 | 1,530 | 23 × (45, 15, 30) + 28 × (46, 16, 30) |
Symbol structure
- Modules
- 141 × 141
- Data modules (codeword bits + remainder bits)
- 18,587
- Remainder bits
- 3
- Alignment patterns
- 33 (centre rows/columns 6, 30, 56, 82, 108, 134)
- Version information blocks
- Yes (2 × 18 bits)