How to Read a Bouldering Grade Scale? 2026
Learning how to read a bouldering grade scale is the fastest way to stop guessing which problem belongs on your warm-up list and which one is going to send you home with skinned shins. In short: a bouldering grade is a number, letter combo, or both, that estimates the hardest single move you have to pull on a short, powerful climb. The two dominant systems are the American V-Scale (VB through V17) and the French Font Scale (1 through 9 followed by A, B, or C, with optional plus signs).
I've been climbing for about twelve years and I've watched brand-new climbers freeze at the wall because the grade tag looks scary. Most of that fear evaporates once the numbers and letters stop feeling like a foreign language. Our team put this guide together so you can walk into any gym or crag, glance at a label, and know what you're signing up for, plus why the same grade at your home gym sometimes feels easier than it does outdoors.
What Is a Bouldering Grade Scale (And Why It Exists)
A bouldering grade scale is a rating system that estimates the difficulty of a short, powerful rock climb called a boulder problem. Higher numbers mean harder problems, and letter suffixes or plus and minus signs give you a finer grade step inside each number.
Grades exist for three simple reasons. They let you pick problems that match your current ability, they let you track progress over months and years, and they let climbers across the world describe a problem without having to stand in front of it first. Without grades, every gym session would be trial and error, and outdoor climbing would basically be guesswork.
Two scales do almost all of the heavy lifting: the V-Scale (sometimes called the Verm or Vermin scale) in the United States and many other countries, and the Font Scale, short for Fontainebleau, in France and most of Europe. Both scales are open-ended, meaning new grades get added at the top as climbers break through previous limits. The current ceiling in the V-Scale is V17, and the Font Scale is creeping toward 9A and beyond. A useful way to remember the difference: a bouldering grade is a difficulty rating, not a grade of quality. Doing a V2 doesn't make the rock beneath you "better" than at a V5, only the movements more demanding.
If you're building a kit to follow the grades outside, our roundup of the best bouldering crash pads pairs nicely with this guide.
The V-Scale (Vermin Scale) Explained
The V-Scale, sometimes called the Verm scale or Vermin scale, runs from VB (V-Beginner) at the easy end to V17 at the elite ceiling. Each step up roughly doubles the difficulty of the previous grade, which is part of why the scale climbs quickly in your early months and crawls later.
The system traces back to Hueco Tanks, a famous bouldering area in Texas, in the late 1980s. A climber named John "Vermin" Sherman developed the scale to rate problems on the same rock the rest of us were already struggling on. The "V" stands for Vermin, his nickname, and the open-ended numbering system stuck because it was simple, fast to use, and easy to extend as new problems pushed past the old ceiling.
Here is what the tiers look like in practice. VB problems are the basic routesetters put up so first-timers can learn footwork and hand placement. V0 is the starting line for repeatable climbing. V1 through V3 is where most adult intermediates spend a healthy amount of time. V4 through V6 marks strong recreational climbing. V7 through V10 is advanced territory, and anything V11 or harder is the kind of climbing most of us will only ever watch on video.
The Font Scale (Fontainebleau Scale) Explained
The Font Scale, short for Fontainebleau Scale, is the French system that took root in the same forest the name comes from: the sandstone boulders of Fontainebleau, just south of Paris. Instead of a single number it uses a number plus a letter: 1 through 9, then A, B, or C, with an optional plus sign.
Read it like this. The number tells you the rough band (1 is super easy, 9 is currently the hardest in the world). The letter narrows the band: A is the easiest block within that number, B is the middle, and C is the top. Add a plus and you've stepped up to the harder half of the next number. So 6A is the start of the 6 band, 6B sits in the middle, and 6C+ lands just below 7A.
You'll see the Font Scale on European guidebooks, at European gyms, and in competition climbing around the world. USA Climbing uses Font grades for its international comps even though most American gyms still display the V-Scale. If you ever travel to climb, getting comfortable translating between the two saves a lot of time at the wall.
V-Scale to Font Scale Conversion Chart
The two scales don't line up perfectly, but the table below gives you a working conversion that matches what gyms, guidebooks, and forums use. Treat it as a starting point, not a hard rule.
| Skill Band | V-Scale | Font Scale | What It Feels Like |
|---|---|---|---|
| Absolute Beginner | VB | 3 | Big holds, flat wall, learn footwork |
| Beginner | V0 | 4 | First moves off the ground with intent |
| Early Intermediate | V1 | 5 | Sustained climbing, basic balance moves |
| Intermediate | V2 | 5+ to 6A | Reach-dependent moves, shorter sequences |
| Strong Intermediate | V3 | 6A+ to 6B | Lock-offs, heel hooks, harder first move |
| Advanced | V4 to V5 | 6B+ to 6C+ | Powerful individual moves, body tension |
| High Advanced | V6 to V7 | 7A to 7A+ | Dynamic moves, hard crimps, sustained pump |
| Elite | V8 to V10 | 7B to 7C+ | Specialist climbing, often a single crux |
| Pro / World-class | V11 to V13 | 8A to 8B+ | Decades of training to even attempt |
| Cutting Edge | V14 to V16 | 8C to 9A | A handful of climbers on earth |
| Current Ceiling | V17 | 9A+ | A handful of sends ever recorded |
If a Font number feels intimidating, the rule of thumb many climbers use is simple: a 6A is roughly a V2, and every step up the letter ladder adds about half a V-grade. The numbers get fuzzy in the middle, and that's normal.
V-Scale to YDS Conversion Chart
Sport climbing uses a different system, the Yosemite Decimal System (YDS), and people constantly ask how a 5.9 or a 5.12 lines up against a V-grade. The YDS only covers the difficulty of the hardest single move, kind of like a mini V-grade stretched along a longer climb, so the comparison is rough. The table below is the same conversion that certified guides and coaching sites use as a starting point.
| YDS Sport Grade | Equivalent V-Scale | Typical Climb Style |
|---|---|---|
| 5.6 to 5.8 | Easier than VB | Easy trad, learning topropes |
| 5.9 | VB to V0 | First real lead climbs |
| 5.10a to 5.10b | V0 to V1 | Beginner sport routes |
| 5.10c to 5.10d | V1 to V2 | Intermediate sport |
| 5.11a | V2 to V3 | Solid weekend sport climber |
| 5.11c to 5.11d | V3 to V5 | Strong sport, hard gym routes |
| 5.12a to 5.12b | V5 to V6 | Advanced sport, projecting territory |
| 5.12c to 5.12d | V6 to V7 | High-end sport, dedicated training |
| 5.13a to 5.13c | V7 to V9 | Pro sport, near-elite bouldering |
| 5.14a and up | V10 and up | World-class territory |
The pattern that holds, even when the numbers disagree, is that each V-grade jump roughly matches three to four letter steps in YDS. A V5, for example, lands around 5.12a to 5.12b on a sport climb. Treat the table as a starting point, then trust your local gym and guidebook for the final call.
Bouldering Grades by Skill Level
Numbers feel abstract until you hang them on real people. Here is how I think about the bands when I'm advising newer climbers at our local wall. Use it as a self-check, not a measuring stick.
Beginner band runs VB through V2. This is everything from your first day on plastic to about six months in for climbers training twice a week. If you're climbing consistently at V1 to V2, you understand body position, footwork, and basic sequencing.
Intermediate band runs V3 through V5. Climbers here can read simple problems on their own, set their own pace, and start to know which moves suit them. At this stage, projecting harder problems for weeks becomes part of the fun.
Advanced band runs V6 through V8. You're either a strong adult climber training deliberately or a teenager with a long background. Sessions start to look like structured training rather than casual climbing.
Elite band runs V9 through V12. A small slice of the climbing population lives here, even though they make up most of the climbing videos you watch. V12 is where most professional climbers had their first big milestone.
Pro and beyond is V13 and harder. A "good" boulderer isn't pinned to one of these bands. Plenty of V5 climbers are crushing hard for their age and experience, and the only grade that matters is the one you can climb today that you couldn't six months ago.
How to Read Plus, Minus, and Letter Sub-Grades
The plus and minus suffixes, and in some systems the a, b, c, d letters, exist to keep the scale from getting too chunky. A V3 sits between V2 and V4, but a V3- is closer to V2 and a V3+ is closer to V4. Without them, every gym problem would round to a flat number and you'd lose a lot of useful signal.
The same idea shows up in the Font Scale's A, B, C block: 6A is the lower third of the 6 band, 6B is the middle, and 6C is the top. The three-second rule is a popular shorthand for how much harder a move becomes across these steps. If you can hold a position for three seconds with a friend waiting by, it sits comfortably in the lower letter. As that shrinks toward one second or less, the letter climbs. Coaches use this rule all the time to estimate grade on new problems.
YDS uses letters the same way on sport climbs. 5.12a is the easiest block within 5.12, 5.12b the middle, 5.12c the top, and 5.12d the ceiling before stepping into 5.13. Once you see the pattern, it works across every climbing grade scale in this guide.
If you find conversion tables handy in other outdoor contexts, our tide chart guide uses the same idea of a numerical scale plus a suffix to deliver finer detail.
How Boulder Problems Are Actually Graded (Gym vs Outdoor)
The grade that ends up taped to a wall is the result of a small group of people doing the climb, then arguing about it until they reach a number everyone can live with. Outdoor, the first ascensionist proposes a grade and the community adjusts it as more climbers repeat the problem. Mountain Project forums and similar community tools often act as the modern tiebreaker.
In gyms, it's a routesetter who proposes the grade. They hand-build the problem on plastic holds, climb it themselves, then compare it to other problems already on the wall. The catch is that routesetters don't always climb at the grade they're setting, so they lean heavily on a process called consensus grading: a few staff members climb it, a few regulars weigh in, and the grade settles.
This is one reason outdoor grades feel harder than your home gym. Gym grade inflation is real and well-documented on climbing forums. Pads and tape leaks can add friction indoors, holds are larger relative to outdoor rock, and routesetters tend to round down to keep members happy. Outdoor rock has sharper holds, weather, cold fingers, and a real bruise penalty when you blow a move. That's why an outdoor V0 typically feels harder than your indoor V2.
Color-Coded Circuit Systems at Modern Gyms
Most modern bouldering gyms layer a second rating system on top of the V-Scale: a color-coded circuit. The idea is simple. Each problem gets a tag, often a colored tape, that places it into a band labeled by color. Green might be the warm-up tier, yellow the easy intermediate, orange the harder intermediate, red the advanced, blue or purple the elite.
Circuits let beginners self-select without reading numbers. New climbers can follow a color from start to finish like a treasure hunt, then start comparing V-grades once they know what each color band feels like. Many gyms also run seasonal resets where each color tier has dozens of new problems for a month, which keeps the wall fresh.
The color tier is usually wider than a single V-grade. A green circuit might span VB through V1, while a red circuit often spans V4 through V7. Treat the color as a coarse filter, and the V-grade next to it as the precise number.
If you're taking a circuit setup outside, a good pad turns gym training into outdoor progression. Our team rounds up the most reliable crash pads to match the way circuits build skills over time.
Bouldering vs Sport Climbing Grades Compared
Bouldering asks the question, "How hard is the single hardest move?". Sport climbing asks the question, "How hard is the route taken as a whole?". Because of that difference, a sport climb graded 5.11a might require a V2-level move repeated ten times in a row, with the pump for all ten. A boulder problem graded V2 needs a V2-level move in just a few hand placements.
The result is that you can't translate the numbers directly. A V3 is roughly equivalent to a 5.12a sport move, even though the 5.12a route is far more strenuous overall. The rule of thumb most climbers use: divide the sport-grade letter steps into boulder terms, and remember that endurance is the missing ingredient on a rope. If you're better at boulders than sport, it's because you generate raw power. If you're better at sport than boulders, it's because you pace yourself well.
Outdoor sport climbing uses the same YDS scale, but with letter sub-grades for fine detail. The way the letters step works exactly like the Font Scale: 'a' is the easier block, 'b' is the middle, 'c' is the top, and 'd' is the ceiling before the next number. The lens is different, but the math is the same.
Bouldering Terminology Glossary
Grades get you in the door, but the words climbers use around them are the next language you'll meet. Here's the lingo I wish someone had handed me on day one.
Send, Flash, Onsight, and Redpoint
A send is a clean completion of a climb. A flash is sending a problem on your second attempt, after watching someone else do it or working out the sequence. An onsight is sending a climb on your very first try with no prior info. A redpoint is sending a route after previous practice on it, drawn from sport climbing.
Beta, Crux, and Project
Beta is the sequence of moves, the body positions, and the tricks other climbers use. The crux is the single hardest move or section. A project is a problem you've been working on for days, weeks, or months and haven't sent yet.
Slab, Overhang, and Mantle
A slab is a low-angle wall, less than vertical. An overhang is a wall leaning out away from you. A mantle is a move where you push down on a hold to stand up onto it, common on slabs and topouts.
Heel Hook, Toe Hook, and Figure Four
A heel hook is when you hook a hold with your heel to pull or stabilize. A toe hook is the same idea with your toe. A figure four is a leg-over-arm position that lets you hang from one arm while pulling with the other, used on hard overhangs.
Frequently Asked Questions
Is 7a+ a good climbing grade?
Yes, 7a+ (about V8 on the V-Scale) is a strong grade for a recreational climber. It is well above beginner and intermediate bands and usually represents years of consistent training. Most adult climbers never reach it. If you climb 7a+ outside, you're in elite territory in any local scene.
What is V1, V2, V3 in bouldering?
V1 is the first numbered step up from beginner V0, usually involving slightly smaller holds and bigger balance moves. V2 is harder still, often asking for a harder first move or a more technical sequence. V3 sits at the start of strong intermediate climbing, with lock-offs, heel hooks, and harder individual moves. Together, V1 to V3 is the band most gym climbers spend their second year of climbing in.
How hard is 5.9 climbing?
5.9 on the Yosemite Decimal System is the first real lead-climbing grade, roughly equal to a VB or V0 boulder problem on the hardest move. A 5.9 sport route might require five or six moves of that difficulty back to back, often with some exposure. Beginner climbers usually feel comfortable leading 5.9 within their first year of consistent sport climbing.
What is Alex Honnold's max boulder grade?
Alex Honnold has sent boulder problems up to V12 (about 8A on the Font Scale), based on public records of his bouldering repeats. He is better known for his free solo rop climbs, especially El Capitan, than for pushing boulder grades at the cutting edge. V12 still puts him in elite company among the strongest pure climbers in the world.
What is the 3-second rule in bouldering?
The 3-second rule is a rough guideline coaches use to estimate grade on a new move. If you can hold the position for three seconds with a friend in support, the move fits the lower letter block of its V-grade. As the hold shrinks toward one second or less, the move climbs toward the upper letter or the next grade. It is a quick mental yardstick, not a precise science.
Is V1 easy in rock climbing?
V1 is the first step up from beginner territory, so it's an approachable grade for newer climbers but not an easy climb. A solid V1 typically asks for balance, basic crimp strength, and small reach moves. For comparison, V1 is roughly equivalent to a 5.10d to 5.11a move on a sport climb, which most sport climbers would not call easy.
Is V0 the easiest climb?
V0 is the first numbered V-grade, but VB (V-Beginner) is the easiest rung on the ladder. VB problems use large holds and gentle angles so first-timers can focus on technique. V0 sits just above VB and is the starting point most beginner-friendly gyms use for repeatable climbing. Above V0, every step is meaningfully harder than the one below.
Final Verdict on Reading Bouldering Grades
Reading a bouldering grade scale is less about memorizing every number and more about training your eye to take in three things: the scale being used, the plus or minus sign, and any color tag on the wall. Once those three clicks, you can walk into any gym or crag and pick problems that match your day.
For 2026, the simplest rule our team still uses: trust your body over the tape. The grade is a guess built on consensus, your local gym, and the person who climbed it first. The only grade that truly matters is the one you can climb today that you couldn't six months ago. Use the numbers to navigate, then forget them and climb what feels fun.
If you want to keep building outdoor know-how, our rapids classification guide uses a similar scale-plus-suffix format to rate river difficulty, and it's a great next read once you're scaling up your adventures.