Convert between all major roped and bouldering grade systems worldwide
Rock climbing grades are the universal language of the vertical world — and yet every country seems to speak a different dialect. Whether you're planning a sport climbing trip to France, comparing notes with a friend from Australia, or trying to make sense of a trad route graded in the British system, a grade converter is an essential tool in every climber's kit. Our Rock Climbing Grade Converter makes instant, accurate conversions between all major international grade systems for both roped climbing and bouldering, complete with difficulty band labels so you always know exactly how hard a route is relative to global climbing standards. The Yosemite Decimal System (YDS) is the dominant grading scale in North America, ranging from 5.0 (easy beginner routes) up to 5.15d (the current cutting edge of human possibility). The "5" prefix indicates fifth-class technical rock climbing requiring a rope; above 5.10, the scale subdivides into a, b, c, and d increments for finer precision. Most gym climbers in the US and Canada are familiar with YDS grades even if they don't know them by name — the tape on the gym walls almost always uses this system. The French sport climbing grade is the international lingua franca for bolted sport routes worldwide. Used across Europe, South America, Asia, and Australia, it runs from 1 through 9c and uses a combination of numbers, letters (a, b, c), and plus signs (6a+, 7b+) for subdivision. When you see a Céüse or Kalymnos trip report with grades like 7b or 8a, that's the French system. It's also the system used in official IFSC World Cup competitions, making it the closest thing climbing has to a universal standard. The UIAA grade (named for the Union Internationale des Associations d'Alpinisme) uses Roman numerals and is the traditional grading scale of Central Europe, particularly Germany, Switzerland, and Eastern Europe. It runs from I through XIII+ and features +/- increments for greater precision. UIAA grades are most commonly encountered in alpine and trad climbing contexts, especially for classic mountaineering routes where the system originated. The British trad grading system is famously unique: it uses two separate grades simultaneously. The adjectival grade (Moderate, Difficult, Very Difficult, Severe, Hard Severe, Very Severe, Hard Very Severe, then E1 through E11) rates the overall seriousness and commitment of the route, including factors like gear quality and fall consequences. The technical grade (3a through 9b) rates the difficulty of the single hardest move on the route. A route graded "E3 6b" therefore demands Hard Very Severe commitment with a 6b crux. This dual system captures what pure movement-difficulty scales cannot: the real-world danger and psychological challenge of a route. The Australian Ewbank system uses a single ascending integer, starting from 1 for the easiest scrambles and currently reaching into the upper 30s for world-class routes. Named after climbing pioneer John Ewbank, it's notable for its open-ended top (no maximum), its single clean number, and its use across Australia and New Zealand. The South African system is structurally similar to Ewbank and the two often share equivalent numbers at moderate grades. For bouldering, two systems dominate: the Hueco V-Scale (American) and Fontainebleau (Font, French). The V-Scale was developed at Hueco Tanks in Texas by legendary boulderer John Sherman, and runs from V-easy (beginners) through V17 (world record problems). Fontainebleau, developed in the famous sandstone forest south of Paris, runs from 3 through 9A and uses a similar letter/number/plus system to the French roped scale. Both systems are widely used in gyms and outdoor bouldering areas globally. Grades across all systems are inherently approximate and subjective. A route's grade reflects a community consensus formed over many ascents by different climbers with different body types, strengths, and styles — which means any conversion chart, including this one, represents a best-approximation rather than a precise mathematical equivalency. Use the difficulty band labels (Novice through Super Elite) alongside the specific grade conversions to get the clearest picture of where a route sits on the global scale of climbing difficulty.
Understanding Climbing Grade Systems
What Is a Climbing Grade?
A climbing grade is a standardized rating of a route's or problem's difficulty, agreed upon by the climbing community through repeated ascents. Different regions of the world developed their own grading systems independently, leading to the current diversity of scales. Grades account for factors like the size and angle of holds, the steepness of the wall, the length of the route, and sometimes the availability of rest positions. Because climbing styles vary — some climbers excel on crimpy vertical faces, others on powerful overhanging compression moves — the same grade can feel different depending on the individual. This subjectivity is why all grade converters, including this one, are approximations rather than exact equivalencies.
How Does Grade Conversion Work?
Unlike unit conversions (where 1 inch always equals 2.54 cm), climbing grade conversions are table-based rather than formula-based. There is no mathematical relationship between, say, French 7a and YDS 5.11d — the equivalency exists only because the climbing community has agreed over decades of practice that routes of similar difficulty tend to receive these grades in their respective systems. Our conversion table synthesizes data from multiple authoritative sources including Mountain Project, Guidedolomiti, Bergfreunde, and Rab Equipment to produce the most widely accepted equivalencies. Where sources disagree, we use the most commonly cited mapping.
Why Does Grade Conversion Matter?
Climbers regularly travel internationally to famous destinations like El Capitan (YDS), Kalymnos (French), Frankenjura (UIAA), or Arapiles (Ewbank). Without accurate grade conversion, it's impossible to know whether a route will be at your limit, within your comfort zone, or dangerously above your abilities. Grade conversion is also essential for gym climbers who travel outdoors, for coaches building training programs, for guidebook authors, and for anyone who wants to compare personal achievements across different climbing regions. The difficulty band labels (Novice through Aliens) provide an extra layer of context that transcends any individual grading system.
Limitations of Grade Conversion
No grade conversion chart is perfect. Grades are set by individual route developers and refined by community consensus, meaning there is inherent variability — a French 7a at one crag may feel easier or harder than a French 7a somewhere else. Additionally, grades can become outdated as holds break or become polished over time. The British system is particularly hard to convert because its adjectival component captures factors (gear quality, fall consequences, weather) that other systems ignore entirely. Body type matters too: tall climbers often find reachy routes easier, while short climbers may excel at compression or technical face climbing. Always treat converted grades as a starting point for route research, not a guarantee.
How to Use the Rock Climbing Grade Converter
Choose Your Discipline
Click 'Roped Climbing' for sport, trad, or any route where you use a rope and clips or gear. Click 'Bouldering' for unroped boulder problems up to around 6 meters high. The available grade systems and grades will change to match your selection.
Select Your Grade System
Choose the grading system you already know — for example, YDS if you climb in the USA, French if you climb in Europe, or Ewbank if you climb in Australia. The grade dropdown will then show all valid grades in that system.
Pick Your Grade
Select the specific grade from the dropdown. Results appear instantly, showing the equivalent grade in every other major international system, plus the difficulty band label (Novice, Beginner, Intermediate, Advanced, Expert, Super Expert, Elite, Super Elite, or Aliens) and your grade's position on the overall difficulty spectrum.
Explore the Full Reference Table
Click 'Show Full Reference Table' to see a complete side-by-side comparison of all grades across all systems. Your selected grade is highlighted in the table. Use 'Copy All Equivalents' to copy the conversion result to your clipboard for sharing.
Domande Frequenti
What is the difference between YDS and French grades?
YDS (Yosemite Decimal System) is the standard in North America, using decimal notation like 5.10a, 5.11c, 5.14d. French grades are the international standard for sport climbing, using numbers and letters like 6a, 7b+, 8c. Both systems roughly overlap in difficulty: 5.10a (YDS) ≈ 6a (French), 5.12a ≈ 7b, 5.14a ≈ 8c. However, grading philosophies differ slightly — French grades are generally considered slightly stiff (harder relative to equivalent YDS), though this varies by climbing area and the setter's personal style.
Why does the British system use two grades?
The British trad grading system uses an adjectival grade (M, D, VD, S, HS, VS, HVS, E1–E11) to reflect the overall seriousness of the route — taking into account gear quality, potential fall consequences, route length, and psychological commitment — alongside a technical grade (3a through 9b) that rates only the hardest individual move. A route's adjectival and technical grades can be mismatched: a well-protected E2 might have a difficult 6b crux, while an E4 might only have a 6a crux but with terrible gear. This dual system captures aspects of risk and commitment that pure movement grades ignore.
How does V-Scale compare to Font for bouldering?
The Hueco V-Scale (American) and Fontainebleau Font system (French) are the two dominant bouldering grade systems worldwide. They are generally comparable: V0 ≈ Font 4, V3 ≈ Font 6A, V6 ≈ Font 7A, V10 ≈ Font 7C+, V15 ≈ Font 8C. In practice, the Font system is considered slightly coarser (fewer distinct grades at moderate levels) while the V-Scale is more granular. Most indoor bouldering gyms in the US and UK use color-coded tape rather than either system, but Font grades are increasingly common in European gyms and the IFSC World Cup uses Font.
Are climbing grades consistent worldwide?
No — and this is the single most important thing to understand about grade conversion. The same numerical French grade can feel significantly different between a sandbagged Spanish sport crag, a well-equipped French limestone cliff, and a granite face in Sardinia. Regional grading culture, rock type, hold style, and the personal tendencies of the first ascentionist all affect the final grade. Even within a single country, grades at different crags are rarely consistent. This is why experienced climbers always read recent trip reports and local guides rather than relying solely on grade comparisons when visiting a new area.
What difficulty band should a beginner aim for?
Complete beginners typically start in the Novice band (YDS 5.0–5.4, French 1–4a, Font 3–4) for their very first sessions, which involves mostly scrambling and easy angled faces. After a few sessions, most beginners progress into the Beginner band (YDS 5.5–5.7, French 4b–5a, Font 4–5), which is the typical range for introductory outdoor climbing and beginner gym routes. The Intermediate band (YDS 5.8–5.10b, French 5b–6a+, Font 5–6A) represents a typical recreational gym climber who climbs regularly. Reaching the Advanced band (5.10c–5.11c / French 6b–7a) usually requires dedicated training over months to years.
What is the hardest grade ever climbed?
The current frontier of free climbing difficulty is 9c (French) / 5.15d (YDS), which our table labels as 'Aliens' — climbed by fewer than a handful of people in history. As of 2025, Silence (9c, Flatanger Cave, Norway) by Adam Ondra remains the hardest confirmed sport route in the world. In bouldering, V17 / Font 9A represents the outer edge: Burden of Dreams (Nattavaara, Finland) by Nalle Hukkataival was the first confirmed V17. At these grades, the routes are often unrepeated or have very few repeats, making consensus grading nearly impossible.