Rock Climbing Grade Converter
Convert climbing grades between systems: YDS, French, UIAA, and Australian (Ewbank).
Compare route and bouldering difficulty across countries.
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+ | VIII- | E4 6a | 24 |
| 5.12a | 7a+ | VIII+ | E5 6a | 25 |
| 5.12d | 7c | IX | E6 6b | 28 |
| 5.13a | 7c+ | IX+ | E6 6b | 29 |
| 5.14a | 8b+ | X+ | E8 7a | 33 |
| 5.15a | 9a+ | XII- | E10 7b | 36 |
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.
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