Route Grade
5.10a
French
6a
UIAA
VII-
Grade Conversion
5.10a
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Inputs
Result
YDS 5.10a maps to French 6a, UIAA VII-, British E1 5b, Australian 19.
Inputs
Result
V5 in the Hueco Scale equals Fontainebleau 6C, considered advanced level.
YDS 5.10a equals French 6a, 5.11a equals 6c, and 5.12a equals 7b. French grades use numbers with letter suffixes (a, b, c) and plus signs for finer distinctions.
| YDS | French | UIAA | Level |
|---|---|---|---|
| 5.8 | 5b | VI | Intermediate |
| 5.10a | 6a | VII- | Advanced |
| 5.12a | 7b | IX+ | Expert |
The V-Scale (Hueco Scale) rates boulder problems from VB (beginner) through V17 (world-class). V0–V3 is beginner to intermediate, V4–V7 is advanced, V8+ is expert.
No. Grade conversions are approximate because each system evaluates difficulty differently. A route graded 5.10a in the US may feel easier or harder than a French 6a depending on the style.
The UIAA system uses Roman numerals (I through XII) with +/- modifiers. It is primarily used in German-speaking countries and parts of Eastern Europe.
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Last Updated: Mar 20, 2026
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