Climbing grade systems vary by country and discipline, making it confusing to compare routes across regions. The US uses YDS (Yosemite Decimal System), Europe uses French grades, Germany uses UIAA, and the UK has its own two-part British system. Bouldering has separate systems: V-scale in the US and Fontainebleau internationally. This converter translates between all six systems instantly.
Convert Route Grade
Route Climbing Grade Comparison Table
Click any row to convert that grade
| Difficulty | YDS | French | UIAA | British |
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Convert Boulder Grade
Approximate Route Equivalent
Route equivalents are approximate — movement styles differ significantly.
Bouldering Grade Comparison Table
Click any row to convert that grade
| Difficulty | V-Scale | Fontainebleau | Approx. Route (YDS) |
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How to Use the Climbing Grade Converter
This climbing grade converter lets you instantly translate difficulty ratings between the world's major grading systems. Whether you're planning a trip to a European crag and need to decode French sport grades, or checking how your US V-scale bouldering compares to Font grades used at competitions, this tool gives you accurate conversions and a full reference table.
Step 1: Choose Route Climbing or Bouldering
Use the tabs at the top to switch between route climbing and bouldering. Route climbing grades cover traditional trad climbing and sport climbing on ropes, while bouldering grades apply to short, powerful problems climbed without ropes. The two disciplines have separate grading systems because the physical demands and style are quite different.
Step 2: Select Your Input System and Grade
Choose the grading system you know — for example, YDS if you climb in the US — and then select your grade from the dropdown. The grade options update automatically based on the system you choose. For route climbing you can choose from YDS, French, UIAA, or British technical grades. For bouldering, choose between V-scale and Fontainebleau.
Step 3: Click Convert and Read the Results
Click the Convert Grade button to see your grade expressed in all other systems simultaneously. A color-coded difficulty badge tells you where the grade falls on the overall spectrum — from beginner through advanced to elite. You can also click any row in the full reference table below to highlight and convert that grade.
Understanding the Grading Systems
The YDS (Yosemite Decimal System) is the standard in North America. Technical climbing starts at 5.0 and currently goes up to 5.15d. Grades are subdivided with letters a, b, c, d from 5.10 upward. The French system is the international sport climbing standard, using numbers and letters like 6a, 7b+, 9a. The UIAA system uses Roman numerals from I to XII and is common in Germany, Austria, and Eastern Europe. British grades combine an adjectival grade (VS, HVS, E1–E11) with a technical grade (4a–7b), and this tool shows the technical grade for comparison.
Why Grade Conversions Are Approximate
Climbing grades are inherently subjective. Routes are graded by the first ascentionist or by community consensus, and the same numeric difficulty can feel very different depending on rock type, hold style, and body dimensions. A powerful V4 on a steep overhang might convert to 6B Font on paper, but could feel harder or easier than a technical balance problem at the same Font grade. Use these climbing grade conversions as a guideline rather than an exact science — when in doubt, warm up on lower grades at an unfamiliar area.
Frequently Asked Questions
Is this climbing grade converter free to use?
Yes, this climbing grade converter is completely free with no limits or signup required. All conversions run locally in your browser and no data is sent to any server.
Is my data safe and private?
Yes, all calculations happen entirely in your browser using client-side JavaScript. Nothing is sent to any server or stored anywhere. Nothing is saved after you leave the page.
What climbing grade systems does this tool support?
The tool supports six major systems: YDS (Yosemite Decimal System, used in the US), French sport grades (used in Europe and worldwide), UIAA grades (used in Germany and Central Europe), British grades (tech grade + adjectival), V-scale bouldering (US standard), and Fontainebleau bouldering grades (international standard).
Are climbing grade conversions exact?
Climbing grades are inherently subjective and conversions are approximate. The same difficulty can be graded differently at different crags, by different setters, and for different styles such as crimpy versus slopy. Think of conversions as ballpark equivalents rather than exact matches.
What is the difference between YDS and French grading?
YDS (Yosemite Decimal System) is the dominant system in North America, using grades like 5.10a through 5.15d. French grades use a numeric plus letter system like 6a, 7b+, 9a, and are standard in Europe. Roughly, 5.10a equals about 6a, and 5.14a equals about 8b.
What is the difference between V-scale and Fontainebleau bouldering grades?
V-scale (Hueco scale) is the standard bouldering grade system in the US, starting at V0 and going up to V17. Fontainebleau (Font) grades are used internationally, starting at 4 and going up to 9A. They describe the same difficulty range but are different numbering systems. V4 is roughly Font 6B.
What does the British grading system mean?
British trad climbing uses two grades together: an adjectival grade (Mod, Diff, VD, S, HS, VS, HVS, E1-E11) that reflects the overall difficulty and seriousness of the route, and a technical grade (4a through 7b) that describes the hardest single move. This guide shows the technical grade equivalent as that is most comparable to other systems.
Can I use this tool to compare route climbing and bouldering grades?
Yes, the reference table shows both route grades and bouldering grades side by side so you can see how they compare across systems. Generally, V3-V4 bouldering is comparable in difficulty to 5.11 sport climbing, though the movement styles are quite different.