Bouldering Grades, Explained

Walk into any bouldering gym and you will notice small tags at the base of each climb, marked with letters and numbers like V0, V3 or V6. To a beginner, they can look like a secret code. They are actually a simple way to describe how hard a climb, called a problem, is likely to feel. Bouldering problems are graded by difficulty, but grades vary between gyms, between outdoor areas and even between climbers. Here is what those numbers mean, how to use them and why you should not take them too seriously.

What a bouldering grade measures

A bouldering grade is a rough estimate of a problem’s overall difficulty. It considers things like the size and shape of the holds, the steepness of the wall, the distance between moves, how powerful or delicate the movement is and how many hard moves come in a row. A short problem with one very hard move and a longer problem with many moderate moves might share the same grade.

Grades are set by the people who create the problems, called route setters in gyms, and by the climbers who first complete them outdoors. Over time, other climbers weigh in, and grades may shift up or down as a consensus forms. That process makes grades useful, but it also means they are opinions rather than precise measurements.

The V scale, explained

In the US, most bouldering is graded on the V scale. It starts at V0 for the easiest problems and climbs through the numbers, with elite outdoor problems reaching the high teens. Many gyms also use VB, sometimes called V-basic or V-beginner, for problems even easier than V0.

Here is a general picture of how the scale tends to feel for most climbers, though every gym and climber is different:

• VB to V0: big holds, gentle angles and simple movement. Perfect for first-timers.
• V1 to V2: smaller holds and more thoughtful footwork. Many beginners reach this range within a few months.
• V3 to V4: steeper walls, trickier sequences and moves that require body position and technique.
• V5 to V6: demanding problems that often take regular climbers years of consistent practice.
• V7 and up: advanced and elite levels that require serious strength, technique and experience.

Some gyms skip specific numbers and use color-coded ranges instead, such as V0 to V2 for one tag color and V2 to V4 for another. This approach acknowledges how fuzzy grades can be and encourages climbers to try problems on feel rather than chasing exact numbers.

Other grading systems

Outside the US, you may also see the Font scale, which originated in a famous bouldering area in France and uses numbers and letters like 6A or 7B+. Roped climbing in the US uses a different system altogether, the Yosemite Decimal System, with grades like 5.9 or 5.11a. If you travel or switch between bouldering and roped climbing, it helps to know these systems exist, but you do not need to memorize conversion charts to enjoy the sport.

Why grades vary so much

Climbers joke that grades are a matter of opinion, and they are not wrong. A V3 in one gym can feel like a V5 in another. Outdoor problems are often described as harder than the same grade indoors. Even within a single gym, two problems with the same tag can feel completely different to you.

There are several reasons for that. Route setters have different styles and body types. Some problems favor tall climbers who can reach far, while others favor shorter climbers who can fit into tight positions. One climber may excel on steep, powerful problems and struggle on delicate slabs, while another is the reverse. Rock type, temperature and friction matter outdoors, too.

Climb what’s fun. The grades will follow.

Mira Shah, climbing editor

Mira Shah has seen plenty of climbers get stuck chasing numbers, and her advice is simple: pay attention to the movement you enjoy and the problems that make you smile. Strength and skill come with time and practice, and the numbers rise on their own.

Start easy

Climb lots of easy problems to build technique. This is the best advice for any new boulderer, and it is easy to ignore. When you are eager to progress, it is tempting to jump onto harder problems right away. But easy climbs are where you learn the footwork, balance and body positioning that make hard climbs possible.

Try this simple approach for your first few months:

1. Warm up on several VB or V0 problems at the start of every session.
2. Repeat favorite easy problems, focusing on quiet, precise foot placements.
3. Try every problem in a grade range before moving up to the next.
4. Pick one slightly harder problem per session as a project, and give it a few tries.
5. Rest between attempts, and end the session before you are completely exhausted.

Fingers, tendons and shoulders adapt more slowly than muscles, so building gradually also helps prevent injuries. If something hurts sharply or for a long time, take a break and check with a medical professional.

Key takeaway: Volume on easy problems builds the technique that unlocks harder ones. Do not rush the grades.

It also helps to watch other climbers on the problems you want to try. Notice where they place their feet, when they shift their hips and how they rest between moves. Then try the problem your own way. Every body is different, and the best sequence for a tall friend may not be the best one for you.

Ignore the ego

Grades are a guide, not a scoreboard. They are useful for finding problems at the right level and for tracking progress over time, but they are a poor measure of how good a climber you are. Comparing your grades with friends can quickly turn a fun, social sport into a stressful competition.

Some of the most rewarding sessions have nothing to do with numbers. Finishing a problem that felt impossible last month, discovering a new technique or helping a friend figure out a tricky sequence can all feel better than sending a higher grade. Many experienced climbers say the people who improve the most are the ones who climb a wide variety of problems and styles, not just the ones at their limit.

A few ways to keep grades in perspective:

• Try problems by color or style, not just by grade.
• Work on your weaknesses, such as slabs or overhangs, even if it means lower numbers.
• Celebrate improvements in movement and confidence, not just grades.
• Remember that grades in a new gym or outdoor area may feel very different.

When you do take your skills outdoors, start well below your usual gym grade. Outdoor bouldering adds uneven landings, unfamiliar rock and changing conditions. Use crash pads, climb with a spotter and consider a guided session to learn the basics of outdoor bouldering safely.

A number, not a verdict

Bouldering grades are a helpful tool for finding the right challenge, but they are only part of the story. Start with easy problems, build technique through lots of climbing and let the grades follow naturally. Climb what is fun, try new styles and enjoy the friendly, problem-solving community that makes bouldering so special. The numbers will rise with time. The fun should start on day one.