6b+ to V Scale: How Font 6B+ Converts to V4

If you’re looking to understand how the 6b+ climbing grade converts to the V scale or Yosemite Decimal System (YDS), here’s your quick answer:

A Font 6B+ boulder is roughly equal to V4 on the Hueco scale, comparable to the crux of a 5.12a route. A French sport 6b+ route is a different grade, equal to about 5.10d on the YDS.

In this post, you’ll learn how these grading systems compare, what each one measures, and why the conversions aren’t always exact. Whether you’re switching from sport climbing to bouldering or just traveling abroad, this guide will help you match your skills to the right grade.

Converting 6B+ Font to V-Scale

When climbers cross from Europe to the U.S., they meet two main bouldering grades: the Font scale (Fontainebleau) and the V-Scale, named for John “Verm” Sherman. Each scale comes from a different place. Font is commonly used in Europe, but the V-Scale is well known and used across the United States.

Knowing the best way to convert a 6B+ Font grade to its V-Scale equivalent helps empower climbers. This information allows them to more accurately plan trips and select crags.

The Font scale uses numbers, letters and plus signs like 6A, 6B and 6B+ to differentiate grades. By comparison, the V-Scale goes up in whole numbers: V0, V1, V2, and so on. A 6B+ problem is about V4 in the U.S., according to Mountain Project's grade comparison chart.

This is definitely not a hard and fast rule. Some gyms or crags might grade routes more difficult or easy, and an individual climber’s strengths can drastically alter how a route may be experienced. For reference, here is a quick look:

Font Grade	V-Scale
6B+	V4
6C	V5
6C+	V5

One common pitfall is assuming the grades are exact equivalents. Both scales focus on the difficulty of the moves, but their steps don’t line up perfectly.

Another common mistake is to trust online charts without checking the local scene, as grades can shift from one spot to the next.

It’s a good idea to ask local climbers or try a handful of problems at a grade before jumping to harder ones. Understanding both scales makes for better trips.

Alpine grades add factors like severe weather and rockfall. In the U.S., climbers generally use the Yosemite Decimal System (YDS) to rate roped rock routes, with letters added from 5.10a upward.

Bouldering here is graded on the open-ended V scale, which starts at V0 and currently tops out at V17. France and much of Europe use a letter-number system for sport climbs, such as 6b+. This system doesn’t correspond perfectly with the V scale. Alpine and trad grades, like the British E-grade, measure more than just difficulty. They consider how safe or bold a route might feel.

Grades aren’t completely arbitrary, either. They change with new information, more climbers, or simply local sentiment. Two climbs rated the same can seem worlds apart. That’s particularly the case when you change countries or disciplines of climbing.

These systems help climbers stay safe and communicate clearly at the crag.

What Are Climbing Grade Systems?

Climbing grade systems are a way for climbers to gauge the difficulty of a climb. These systems rate routes based on the hardest moves on the route. They measure how much physical strength is needed and how dangerous the climb could be. The ultimate objective is to give climbers the best possible idea of what they’ll find.

They help you read guidebooks and talk with friends at the climbing gym. Styles of climbing, such as sport, trad, bouldering, and alpine, have different methods to indicate a grade. Sport climbing grades weigh endurance along with the hardest moves.

Bouldering Grades Explained Simply

Bouldering grades indicate how difficult it is to scale a short vertical face or boulder problem without a rope. These bouldering grades are nothing like those for roped climbing, where endurance and gear usage come heavily into play. Bouldering grades gauge your strength and the difficulty of the moves.

They focus on how hard the holds and moves are. Climbers use bouldering grades as a shorthand to convey a problem’s difficulty, quickly and clearly. This system helps you, as a climber, find an appropriate climb for your skill level.

The two universally accepted grading systems in bouldering are the V scale and the Font scale, and if you want a deeper breakdown of what the V scale in bouldering is and how it works, check out that guide before diving into conversions.

The V scale, named for John “Vermin” Sherman, is primarily used in the United States. It’s V0 for the easy climbs, up to V2, V5, V10, and beyond for the more difficult ones.

The Font scale, named after the bouldering area of Fontainebleau, is favored in Europe. It begins around 3 and now reaches 9A. Both scales often use a plus sign to signify that a climb is at the top range of that grade. For instance, you may encounter V4+ or 6b+.

For instance, a V0 is usually equivalent to Font 4, and V5 corresponds with Font 6C. Higher grades mean bigger moves, steeper terrain, and more power.

Famous problems such as “Midnight Lightning” in Yosemite’s Camp 4 or “The Mandala” in Bishop sit far above 6B+ and draw strong boulderers from around the world. A V2 or Font 5+ gym problem, by contrast, might have big holds while still asking for body tension and control. These grades inform climbers as to what climbs they should attempt based on their current level and desire to challenge themselves.

Key Differences: Bouldering vs Roped Climbing Grades

Bouldering and roped climbing dish out two completely separate universes, and their respective grade scales reflect that loud and clear. Bouldering grades, like the V scale that’s used in the U.S., focus on dynamic, short, powerful moves. Generally, you climb without a rope, looking the wall or rock in the eye, usually just above the ground.

A standard V4 or V6 boulder problem might be only a few moves long. Every move packs a punch and requires that much more explosive strength, or more complex body positions. Roped climbing grades, including the French system (ex. 6b+) or the Yosemite Decimal System (YDS), describe much longer routes.

These ascents test strength, but they also test endurance and demand skill in placing gear or clipping draws.

Not only the context of the grade but the grading context itself is different. Unlike roped climbing, in bouldering one extremely difficult move may determine the grade. For instance, a V5 may have one huge jump, and the rest of it is cake.

With roped climbs, the grade is definitely what the hardest bit is with respect to a climb, but it’s the length and how consistent the difficulty is. A 6b+ sport route might have a crux move in the middle. You have to be dialed and fluid throughout the whole line, sometimes over 60 feet long.

Each system has its strengths. Bouldering grades are straightforward and direct, giving climbers a clear idea of what they should expect. For a given route, roped grades give a full picture of a route’s difficulty.

In practice, they can appear to be much more complicated and vary wildly from crag to crag. The physical part is a wild difference. While bouldering demands explosive energy and technical accuracy, roped climbing is about control, pressure in the hands, and mental fortitude.

How Grade Conversion Is Determined

Between climbing systems, grade conversion comes from both comparison charts and community practice. In the United States, boulderers use the V Scale, while in Europe they use the Font Scale, and Japan has its own Dankyū system.

John Sherman, aka “Verm,” codified the V Scale for his 1991 Hueco Tanks guidebook, according to Climbing magazine. It goes from V0, for beginner-friendly climbs, up to V17, for the hardest problems ever climbed. The Font Scale uses numbers, letters and plus signs, such as 6B+, which gives it finer steps than the V Scale.

Climbing communities and guidebooks are central to establishing and checking grades. Guidebook authors gather input from local climbers and sometimes regrade a problem if the local consensus shifts.

In bouldering gyms or outdoor areas, climbers talk about how a problem feels, and that shared experience often shapes how a grade gets accepted or changed.

When matching up grades between systems, these criteria are usually considered:

Physical difficulty (strength, technique, endurance)
Style of movement (power moves vs. technical sequences)
Risk and fall potential
Consensus from local climbers
Feedback from guidebook editors

Despite these standards, grade conversion remains approximate. A Font 6B+ can feel like V4 to one climber and V5 to another, based on personal strengths.

The V Scale’s larger steps between grades add to these differences. Local conditions and the style of a climb can further affect what grade seems appropriate. Climbers fresh to a region can be left scratching their heads when grades don’t match up with conversion charts or tables found online.

Beyond the Numbers: Context is Key

As intuitive as climbing grades such as 6b+ or V-scale may appear, the numbers are misleading. Grades give a basic idea of what to expect, but real-world climbs bring a mix of factors that shape how hard a route feels. Local rock types make a huge difference.

Sandstone, granite, and limestone each have their own textures and hold types. These traits affect not only how you move between moves but how difficult each move appears to be, even when graded the same.

Weather is a factor, as well. Humid days, for example, can make holds greasy and difficult to hold on to, whereas dry, cooler air might provide improved friction. Sun, shade, and wind further change the equation.

A slab on a cold, dry day can feel much easier than an overhang of the same grade in the peak of summer. More advanced climbers usually notice these changes sooner. A new climber can be intimidated by a V2 boulder when they don’t recognize the unfamiliar holds.

In comparison, a climber with years of experience learns to adjust quickly and see the rock as it truly is. Physical shape and mental readiness are just as important as skill. If you come into it fatigued or rushed, what could even be a familiar and previously easy route will seem more challenging.

On some days, anxiety about falling or apprehension starts to set in. Preparing properly, by stretching, warming up, and understanding your limits, can help even the most advanced climber find a route of any grade a little less daunting.

Applying the 6b+ to V-Scale Knowledge

Understanding how the Font Scale and the V-Scale line up is a key skill for any climber moving between gyms, crags, or even countries.

The Font Scale, or Fontainebleau scale, is commonly used in Europe. A 6B+ sits in the middle of the scale and doesn’t line up perfectly with the US V-Scale, which goes from V0 to V17. A 6B+ boulder usually converts to V4, though a hard one can feel closer to V5.

Each problem’s grade also depends on who first climbed it. Outdoor boulders get their first grade from the first person to send them. This allows for grades to change over time as more people ascend the problem and leave their comments.

Climbers get the most out of converting grades when they do it in practice during actual climbing sessions. For every problem, in addition to writing down the grade you earned, attempt to write down how each problem felt. This practice goes a long way toward clarifying the commonality and the divergence.

Maintain a logbook or digital app to track your journey through both grading scales. It’s a simple way to spot trends, like whether you find certain styles easier on one scale than the other.

Tips for switching from Font to V-Scale:

Refer to conversion charts, but rely on your own judgment first.
Note that gym grades tend to be a bit squishier than outdoor grades.
Make sure to pay attention to what the style looks like. Are the moves reachy, powerful, technical, etc.
Don’t fixate on the number. Focus on learning, movement and fun.
Discuss with local climbers which sandbags are prevalent in your area.

Knowing both systems opens doors to more climbing, smarter training, and better self-assessment.

Climbing Grade Conversions

Frequently Asked Questions

What does 6b+ mean in bouldering grades?

6B+ is a Font (Fontainebleau) bouldering grade, widely used in Europe. It is a solid test for mid-level climbers. On the French sport scale, 6b+ is a route grade equal to about 5.10d.

What is the V-scale equivalent of 6b+?

A 6B+ on the Font scale roughly translates to V4 on the V-scale. The V-scale is the most popular bouldering grade system in use in the United States.

Why do bouldering grades vary between Font and V-scale?

The Font scale developed in France, while the V-scale developed at Hueco Tanks in Texas. Their grading benchmarks differ, so discrepancies can arise when converting between the two scales.

Are grade conversions always exact between Font and V-scale?

No. Climbing style, local grading standards, and the climbing gym or location can all influence the experience of a problem.

How can I use the 6b+ to V-scale conversion in U.S. gyms?

If you’re familiar with Font grades, look for V4 problems in your local gym as the closest match to 6B+.

Does the difficulty change outdoors versus indoors?

Yes. Outdoor problems can feel harder because holds are less obvious and conditions vary. Indoor grades are often more uniform.

Should I rely only on grades when picking bouldering problems?

No. Grades are only there to help you. Explore a variety of problems, work on areas that play to your strengths, and have fun climbing whatever the number might be.

Sources

International Climbing Grade Comparison Chart, Mountain Project
10 Things You Didn't Know about Bouldering Grades, Climbing