There are several methods of grading how difficult a climb is. Knowing how one method relates to another is sometimes difficult. Below is a chart to help you determine how one method relates to another.
| Climbing | Bouldering | ||||||
| North America (YDS) | Austr. | French | UIAA | UK | Hueco | UK | Font |
| 5.2-3 | 9-Aug | 2-Jan | I-II | HVD | – | ||
| 5.4-5 | 12-Oct | 3-Feb | III | MS | – | ||
| 5.6 | 13- | 4 | IV | S | – | ||
| 5.7 | 13+ | 4+ | V- | VS | – | ||
| 5.8 | 14 | 5a | V | HVS | – | ||
| 5.9 | 15 | 5b | V+ | V0 | B1 | 4 | |
| 5.10a | 19 | 6a | VI+ | E1 5b | |||
| 5.10b | 19/20 | 6a+ | VI+/VII- | E2 5c | V0+ | B2 | 4+ |
| 5.10c | 20 | 6b | VII | V1 | B3 | 5 | |
| 5.10d | 21 | 6b+ | VII+ | E3 5c | |||
| 5.11a | 21/22 | 6c | VII+/VIII- | V2 | B4 | 6a | |
| 5.11b | 22 | 6c+ | VIII- | E4 6a | V3 | 6a+ | |
| 5.11c/d | 23 | 7a | VIII | B5-6 | |||
| 5.12a | 24 | 7a+ | VIII/VIII+ | E5 6b | V4 | 6b/c | |
| 5.12b | 25 | 7b | VIII+ | V5 | 6c | ||
| 5.12c | 26 | 7b+ | IX- | E6 6b | V6 | B7 | 6c+ |
| 5.12d | 27 | 7c | IX | 7a | |||
| 5.13a | 28 | 7c+ | IX/IX+ | V7 | B8 | 7a+ | |
| 5.13b | 29 | 8a | IX+ | E7 6c | V8 | 7b | |
| 5.13c | 30 | 8a+ | X- | B9 | 7c | ||
| 5.13d | 31 | 8b | x | E8 7a | V9 | ||
| 5.14a | 32 | 8b+ | X/X+ | V10 | B10 | 7c+ | |
| 5.14b | 33 | 8c | X+ | E9 7b | V11 | ||
| 5.14c | 34 | 8c+ | XI- | V12/13 | B12 | 8a+ | |
| 5.14d/5.15 | 35 | 9a | XI | E10 7c | |||