Climbing Grades Explained: Yosemite Decimal System and the V Scale

The Yosemite Decimal System

The YDS has several classes. Class 5 covers technical rock climbing where a rope and protection are normally used. Within class 5, the number after the decimal point rises with difficulty: 5.5 is easier than 5.9, and so on up to 5.15 and beyond at the top of the sport.

From 5.10 onward, climbs are further split by the letters a, b, c and d, with d being the hardest within a number. So 5.10a is easier than 5.10d. Some areas use plus and minus signs instead of letters in the lower grades, and the system is open-ended at the top, which is why new numbers appear as climbers push limits.

The lower end of class 5 is often called easy climbing, but even there you may need to use your hands and a rope on exposed terrain. Gyms set their own difficulty ranges, so check the grade key posted near the wall to see how your gym uses the numbers.

The V scale for bouldering

The V scale was developed for bouldering and starts at V0, with the hardest problems currently graded much higher. Each number is one step up in difficulty, and some gyms and areas add plus and minus signs for extra detail. Problems below V0 are sometimes labeled VB for beginner.

The V scale describes the hardest sequence of moves on a problem, since boulders are short and intense. A V3 might have a handful of difficult moves, while a roped route graded the same difficulty might require sustained effort over many moves.

Some outdoor areas also use a different style for boulder grades, with a mix of V grades and local scales. Check the guidebook before you go, and ask local climbers if the grades feel soft or stiff compared with your home gym.

How the two scales compare

People often ask for a conversion chart. The truth is that no exact conversion exists, because roped routes test endurance and technique over a long climb, while boulder problems test power and precision over a few moves. At best, you can say that certain ranges feel roughly comparable.

Many climbers notice that they can climb a higher number on a boulder than they can on a lead route, or vice versa, depending on their strengths. Treat any chart as a rough guide for planning, not a rule.

If you want a rough sense of how the scales line up, look for a chart in a reputable guidebook or on a gym wall, and treat it as approximate. Remember that your strengths matter: power climbers tend to feel at home on boulders, while endurance climbers tend to feel at home on long routes.

Why grades are subjective

Grades reflect a consensus of climbers who have repeated a route, and they depend on factors like reach, hand size, style and conditions. A route that feels hard for a short climber might feel easy for a tall one. Gym grades are set by route setters and can vary between gyms.

Outdoor grades also change over time as holds break or as climbers find easier sequences. Treat grades as a starting point and listen to the experience of other climbers who have been on the route.

Another factor is conditions. Humid air, hot sun or cold hands can change how hard a route feels on any given day, even when the grade stays the same. Do not read too much into one bad day.

Using grades to progress

A common approach is to climb a range of grades each session. Include warm-up routes well below your limit, projects near your limit, and some easier climbs to practice technique. Tracking your progress in a log can help you see patterns and plan training.

Do not let numbers dictate your enjoyment. Many climbers get more satisfaction from a route that suits their style than from ticking a higher grade. Grades are a language that helps you find suitable climbs, not a measure of your worth.

It can be helpful to set goals that are not tied only to grades, such as climbing ten routes in a session, learning to flag, or trying a new style. Variety builds skills that help you climb harder grades later.

Other grading systems

Outside the United States, other systems apply. The French system, for instance, uses numbers and letters such as 6a and 7c, and boulder problems in Europe often use the Fontainebleau scale. Guidebooks usually include a comparison table.

If you travel, read the grading notes in the local guidebook before choosing routes. Some areas are known for being stiff or soft for their grades, and that can influence how you plan your day.

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A note on safety and ethics

A route's grade says nothing about how well protected it is, how loose the rock is, or how far you could fall. Read guidebook notes and talk to local climbers about safety. The number is only part of the picture.

Be honest about your abilities and choose routes that match your skills and experience. Backing off a route is always an option.