Rock Climbing Grade Converter
Convert between climbing grade systems: YDS, French, UIAA, British, and Australian.
Compare difficulty ratings across systems.
Grade Conversion
Climbing grade systems vary by country but map roughly to each other.
Route climbing comparison:
| YDS (USA) | French | UIAA | British | Australian |
|---|---|---|---|---|
| 5.5 | 3 | III+ | VD 3b | 12 |
| 5.7 | 4c | V- | HS 4b | 15 |
| 5.9 | 5b | VI | VS 4c | 17 |
| 5.10a | 6a | VI+ | E1 5a | 19 |
| 5.10d | 6b+ | VII | E3 5c | 21 |
| 5.11c | 6c+ | VII+ | E4 6a | 24 |
| 5.12a | 7a+ | VIII- | E5 6a | 25 |
| 5.12d | 7b+ | VIII+ | E6 6b | 28 |
| 5.13a | 7c | IX- | E6 6b | 29 |
| 5.14a | 8b | X- | E8 7a | 32 |
| 5.15a | 9a | XI | E10 7b | 35 |
Bouldering comparison:
| V-Scale (USA) | Font (French) |
|---|---|
| V0 | 4 |
| V3 | 6A+ |
| V5 | 6C |
| V8 | 7B |
| V10 | 7C+ |
| V13 | 8B |
| V16 | 8C+ |
Grades are approximate — difficulty perception varies by style and region.
How we build and check this calculator
This calculator runs entirely in your browser, so the numbers you enter stay on your device. The math behind it is written by hand and tested against worked examples and standard references before the page goes live.
SuperGlobalCalculator is independently built and maintained. See how we build and verify our calculators.