QR Code Version 3 (29×29)
QR version 3 is 29×29 modules: up to 127 digits, 77 alphanumeric, 53 bytes or 32 kanji at level L; 24 bytes at H.
Version 3 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% | 127 | 77 | 53 | 32 |
| M | ~15% | 101 | 61 | 42 | 26 |
| Q | ~25% | 77 | 47 | 32 | 20 |
| H | ~30% | 58 | 35 | 24 | 15 |
Codewords and error-correction blocks
The symbol carries 70 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 | 55 | 15 | 1 × (70, 55, 15) |
| M | 44 | 26 | 1 × (70, 44, 26) |
| Q | 34 | 36 | 2 × (35, 17, 18) |
| H | 26 | 44 | 2 × (35, 13, 22) |
Symbol structure
- Modules
- 29 × 29
- Data modules (codeword bits + remainder bits)
- 567
- Remainder bits
- 7
- Alignment patterns
- 1 (centre rows/columns 6, 22)
- Version information blocks
- No (versions 7–40 only)