
| Echelle de valeur | ||||||||||||
| pH 1 - 14 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 12 | 14 |
| pH 0 - 10 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
| pH 1 - 11 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | ||
| pH 0.5 - 5 | 0.5 | 1 | 1.5 | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | ||
| pH 4 - 7 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | |||||
| pH 5 - 9 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | |||
| pH 6.5 - 10 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | ||||
| pH 9 - 13 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | |||
| pH 3.8 - 5.8 | 3.8 | 4.1 | 4.3 | 4.5 | 4.7 | 4.9 | 5.2 | 5.5 | 5.8 | |||
| pH 4 - 7 | 4 | 4.3 | 4.6 | 4.9 | 5.2 | 5.5 | 5.8 | 6.1 | 6.4 | 6.7 | 7 | |
| pH 6.4 - 8 | 6.4 | 6.7 | 7 | 7.2 | 7.4 | 7.7 | 8 | |||||
| pH 7.2 - 9.7 | 7.2 | 7.5 | 8 | 8.5 | 8.8 | 9.2 | 9.7 | |||||
| pH 8 - 10 | 8 | 8.2 | 8.4 | 8.7 | 9 | 9.2 | 9.6 | 10 | ||||
| pH 12 - 14 | 12 | 12.5 | 13 | 13.5 | 14 | |||||||