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Climbing To Bouldering Grade Conversion, This bouldering grades comparison table is designed to help climbers convert from Hueco to French and back to French to V-Scale. The Japanese Grade is a grading system used in Japan to rate the difficulty of bouldering problems. Changing 8b+ Font Climbing Grade Converter Select a grade from a list instead? How to Understand Bouldering Levels and Climbing Grades at Any Gym - including the V Scale, Circuits, and the Yosemite Decimal System (YDS). Climbing Grade Conversion Chart This document provides a comparison of rock climbing grading systems used in France, the UIAA, the Yosemite Decimal Bonnie de Bruijn | March 21, 2019 ← Screen Shot 2019-03-21 at 11. It allows you to convert RP grades between sport climbing and bouldering of athletes who do both also would be interesting. The app is suitable for In this video, we'll break down everything you need to know including different bouldering grade systems (V Scale versus Fontainebleau Scale), how bouldering grades are determined, factors that Data Files Climbing Grades Rock climbing grades International Climbing Grade Comparison Chart A slight outlier from theCrag This conversion page from the theCrag has a chart similar to the images Universal grade conversion Back to contents In general, theCrag displays grades as they are entered and in the area specific context. Knowing how one method relates to another is sometimes difficult. Simply type any grade into the search bar above - whether it's a V-Scale grade like "V5", a Fontainebleau Convert climbing grades between YDS, French, UIAA, British, Australian, V-Scale, and Fontainebleau systems. Support for sport climbing and bouldering grades across French, UIAA, YDS, UK, and V-Scale systems. When climbers move between rope climbing and bouldering, This of course is from the Hueco bouldering grade to the Ewbank climbing grade. Free, instant climbing grade converter to help you understand foreign grading systems. Also below, find 11 tips for better understanding how indoor vs. Easily convert climbing grades across systems like YDS, French, UIAA, British, and more. The most popular grading Rock climbing is rated in different grade systems in different countries and they are hard to compare. With various rating systems used around the world, it's essential to have a climbing The 9b+ grade represents one of the hardest sport climbing levels, while the V scale defines top-end bouldering difficulty. Instant conversion for route and boulder grades. 15d 5. 5 14b 5. It is a double grading system, like the alpine grade, and it International Climbing Grade Conversion Chart The following is a very rough conversion I've pieced together by averaging other sources. Use Bouldering grade VS Sport Grade (and what to expect) Stumbled across this article and found it quite useful/interesting as I'm a sport climber who basically uses bouldering as a tool to get stronger. Approximate conversions as systems are not perfectly aligned. Technical Grade: This records the level of difficulty of the hardest individual move on the route. 12b 5. As Grade Conversions The Rockfax grade tables offer a flexible and accurate comparison from the main world grading systems to the unique British Trad Find rock climbing routes, photos, and guides for every state, along with experiences and advice from fellow climbers. The new grade conversion table Gregory Hart has helped us out to update our grade converter. Climbing Grades Compared >> Online Conversion Bouldering grades are a common language that represents the difficulty of a boulder problem. The higher the climbing grade, the more difficult the route will be. Bouldering grades are the Climbing Grade Conversion Chart This document contains a grading scale for rock climbing difficulties with comparisons between different grading systems. In the table below I have created a direct comparison for you to use. The app is suitable for both novice Climbing & Bouldering Scale Converter for Trad Grade, UIAA, French Sport Grade, American Scale More info on the grades of sport climbing, bouldering, ice climbing & technical climbing! Learn how to convert climbing grades, common challenges, and resources for accurate conversions. Our expert guide to climbing rating systems will help you compare trad to sport, America to Europe, bouldering, scrambling, dry tooling and Next time you go climbing indoors, focus on route reading and climbing with proper flow. Convert bouldering grades between Font, V-scale, Japanese Kyū/Dan, and Australian Ewbank systems with this mobile-friendly tool. Clear grade mapping supports consistent assessment worldwide. If you want to understand the differences and switch from a grading system to another, here is an easy I go bouldering at a gym in Norway and this is their grading system. Does anyone have anymore that could be added? (disclaimer to say 5c to V Scale: Understanding Bouldering Grade Conversion Jake November 27, 2025 Climbers often move between bouldering and sport The British trad rock climbing grades start at Moderate (M) and go through to Extreme 1-11 (E1, E2, E3 etc. Climbers need to demonstrate exceptional strength, technique and endurance to It is best used in conjunction with the downloadable grade comparison table. Complete guide to climbing grades with conversion charts. Confused by climbing grades and rating systems? Learn how to decode route difficulty scales from French to YDS and find your climbing challenge! Grade conversions influence how climbers train and approach different disciplines. 11c in route climbing. 13/8/24, 14:33 Page 1 of 1 ClimbGrades. Easily convert climbing grades with this comprehensive chart. Bouldering grades used all over the world Below is a list of regions alongside which bouldering grading system they use. 8 VS 16 5b VI- Understanding conversion improves comparison across different frameworks. 6 4b S 14 4c V 5. 1/5. Bouldering Gym to Outdoor Bouldering Grade Conversion Chart Illustation: Claire Eckstrom Low-end Bouldering Grades V0 There are basically no gym What Are Bouldering Grades? Similar to any type of climbing, bouldering is graded with a series of numbers and letters. While rope climbers use the Yosemite Decimal System (5. bouldering and lead climbing grade converters and other tools for rock climbers. com © Rockfax 2000, 2002, 2008, 2014, 2016, 2020 If you’ve been to a climbing gym in the US, chances are you have seen the Yosemite Decimal System (5. Grading systems in climbing Climbing grades can be a bit confusing sometimes. This program guides you through the At the same time, the V scale is the de facto standard for bouldering grades in the United States, making it necessary to know both systems if you’re climbing internationally. 10, etc. font I also from France and uses the same grades so it's a A key ability for rock climbing - unless you are only bouldering - is the ability to tie certain knots. a 7b route is around 5. Climbing Grade Conversion: 9c to V Scale A 9c route represents the highest level of difficulty in the sport climbing scale, while the V scale measures What a V5 actually means, how V-scale maps to Fontainebleau, and why gym grades lie. SENDY. Discover the intricacies of climbing grades with our comprehensive guide. The goal is to reach the top of a boulder problem or route. The higher the climbing grade, the more difficult Understanding Climbing Grades For climbers, understanding the different grading systems can be a daunting task. io Tips for Using Climbing Grade Conversions Understand the Context: grades Denver High Schooler Becomes Youngest to Send Bouldering’s Hardest Confirmed Grade Maya Silver Climbing grade conversions for rock climbing and bouldering Quickly convert climbing grades between different systems: French, YDS, UIAA, and more. From sport climbing to bouldering, different types of rock climbing each have their own system, known as bouldering grades, to assess a route’s Convert climbing grades between V-Scale, Font, YDS, French, UIAA, and British systems. Learn how to convert climbing grades, common challenges, and resources for accurate conversions. See the links below A guide to the eccentric world of climbing grading, looking at grade comparison, what the different systems mean and why it's all just so unusual! Discover the definitive guide to bouldering grades. 5 5. The two main bouldering grading or bouldering rating systems are V Grades or the Font system. Routes graded at this level are We would like to show you a description here but the site won’t allow us. 12d 5. com Technical Grade This records the level of difficulty of the hardest individual move on the route. Free poster from Rockfax. We would like to show you a description here but the site won’t allow us. I was climbing V4 at my old gym, moved, and was knocked down to V2. This stands in contrast to rope grades used in sport climbing or trad climbing, such as the Yosemite Bouldering Grade Conversion Now let us see how bouldering grades compare. Learn how bouldering V-scales compare to YDS for route climbing, Climbing Grade Conversion: France, USA, UK & Beyond Every grading system explained — what the numbers actually mean, why they differ, and how to convert between them without getting out of your Everything you ever wanted to know about bouldering grades in one place, including a bouldering grade conversion chart from the V Scale to Font This offers more granularity in the intermediate ranges. See the Rockfax grade table Use this activity-to-steps conversion calculator to easily convert your aerobics, boxing, surfing, swimming, bicycling, and other exercise activities into steps. Everything you need to know about bouldering grades in or a collection of random articles about the most obsessive sport in the world Grade conversion Sport climbing grades Bouldering grades Jimmy Anderson December 22, 2025 at 8:58 PM Llegué a Convert climbing grades instantly between V-Scale, Font, French, YDS, UK and UIAA for bouldering, sport, and trad climbing. Rock climbing and bouldering use different grading systems to measure difficulty. ). Maybe with filters only including more than 10 in either Climbing Grade Conversion Chart (International). When compared to the V scale used in Convert climbing grades among YDS, French, and UIAA scales to understand route difficulty worldwide. Grade converter allows you to easily look up which grade corresponds to which in different The 9a+ grade on the French sport climbing scale represents an extremely advanced level of difficulty. From V0 to V15, unlock the secrets of difficulty ratings and elevate your climbing game. Please visit them on the web at www. 12b, whereas a 7B boulder Key Takeaways Climbing grade systems, including the V scale and French grading scale, help categorize the difficulty of bouldering and sport climbing routes nationwide. Find out how to convert the V scale and more here. The V-scale is widely used in the U. They serve as our tool to gauge and celebrate our climbing milestones, Quickly convert bouldering grades between different systems with our easy-to-use too Keep reading below the conversion chart for an in-depth explanation of climbing grades as well as alpine, water-ice, boulder, and commitment Convert bouldering grades between Font, V-scale, Japanese Kyū/Dan, and Australian Ewbank systems with this mobile-friendly tool. Whether you are transitioning from How to get upgoats on r/climbing: google image search "climbing grade conversion" post 1st result profit??? The tool allows you to convert between different climbing grade systems, such as YDS (USA), UIAA (Europe), Fontainebleau (France), UK, Bouldering, etc. Understanding the 12a to V Scale . While sport climbing has a Our climbing grades convertors (both classic routes and boulders) have been made by great climbers, traveling and climbing all around the world for more than 15 years. 3/5. , and especially for Free climbing grade converter: convert instantly between all major climbing grade systems. In this guide, we will Bouldering grades are a common language that represents the difficulty of a boulder problem. Convert rock climbing grades between French, YDS, British, and UIAA systems. Pop in a climbing grade, see its global equivalent, and climb on with gusto. It ranges from beginner levels, starting around 1-kyu (easier) to more advanced levels like 1-dan If you’re trying to understand how a 6c bouldering grade converts to the V Scale or sport climbing grades, here’s the quick answer: 6c roughly equals V5 in the Hueco (V) Scale and 5. 8A also translates to about 5. For bouldering, these include: FONT The rockfax grade tables offer a flexible and accurate comparison from the main world grading systems to the unique british trad grade and uk tech grade. In this article we go over the nuances of rock climbing grades, indoor and outdoor, what they mean, and how to understand them. 14a in sport climbing grades In this article, you’ll see how these systems compare, why the conversions aren’t always perfect, and how to use each scale /uj My gym, above V1, starts curving super hard through V2-V4, and probably lines up with outdoor grading at about V5. 15b 5. S. The main use of assigning route difficulty is to help other Conversion tables of climbing grades Conversion tables of climbing grades Corax Save Add photos See all photos 45897 Hits 91. V scale to font scale here is a chart showing the bouldering rating The different grading systems The grades you'll usually see at UK climbing walls are based on those used for outdoor bouldering and sport climbing. 10 to 6A/6B grade, with expert advice on safety considerations and planning An ethic that, in rock climbing, means that subjective factors are as important as technical ones. International rock climbing classification systems are shown in the chart at the right, and below is a comparison of Alpine, Ice, Snow, Aid, and Commitment grading Bouldering Grades Bouldering is a form of rock climbing that is performed without the use of ropes or harnesses. The best way to approach the conversion is to travel, go climbing and get used to the different grades! We would like to show you a description here but the site won’t allow us. Key Takeaways The French 8a+ grade represents the upper end of the sport climbing difficulty scale. Each system has its The ultimate visual tool for climbing grade conversion. 13c 5 13d 5. Bouldering Vs. We have left out E-grades above E8 as we do not Here's a bouldering-to-YDS conversion chart I had a hard time finding a chart online that converts the Sherman V-grade system for bouldering into the Yosemite Decimal System for climbing. 10b grade applies to sport climbing and trad Understanding Climbing Grades Before we jump into the conversion, it's crucial to understand the different grading systems used in bouldering and sport climbing. Download Bouldering Grade PDF – This simple tool come in handy when climbing outside the country (unless you’re fluent in multiple grading systems). Bouldering Grade Converter For boulderers, our Bouldering Grade Converter is the perfect tool to quickly convert between various bouldering grading systems. Our climbing grades convertors (both classic routes and boulders) have been made by great climbers, traveling and climbing all around the world for more than 15 years. Grades are used in rock climbing gyms and outdoors. 9, 5. This is to be interpreted as if you can boulder V5 then you can probably climb 26. Confused by YDS, French, UIAA sport climbing grades? Our global comparison gives a clear understanding for international climbs. X) on the roped climbing routes and the Find rock climbing routes, photos, and guides for every state, along with experiences and advice from fellow climbers. The 6A bouldering grade is about the same as a V3 on the Hueco scale or a 5. Understanding their Home → Rock Climbing →Bouldering Grades Bouldering Grades About Convert between different climbing grade systems instantly. Understanding the different Summer Climbing Grade Comparisons A brief explanation of the main climbing grades used in the UK The UK climbing grading system is Learn how to convert climbing grades between different systems, including US to UK/Euro grades and 5. This also shows conversions between various bouldering grades DOWNLOAD: Climbing grade chart WATCH: BMC The 7a bouldering grade in the Font system signifies a move into upper intermediate to advanced climbing levels. I had a hard time finding a chart online that converts the Sherman V-grade system for bouldering into the Yosemite Decimal System for climbing. But who decides the grade? And what makes a grade? Moved Permanently The document has moved here. There are several methods of grading how difficult a climb is. For example, a 7c Font Scale grade usually translates to V9 on the V-Scale. They signify growth, the overcoming of challenges, and the pursuit Bouldering Grades The Complete Guide 99Boulders Bouldering Grade Conversions Thecrag does so by using an open ended and. ), the world of Converting 6b to the V Scale When you start moving between bouldering gyms or outdoor spots in different countries, you might see both the Font scale and the V scale on the same Rock climbing grading systems are the heart and soul of our beloved pursuit. Use Rab’s interactive tool to understand global climbing difficulty scales and plan your next route with confidence. 2 3b 11 3 III 5. Understanding Bouldering Grades Bouldering grades stand as a universal metric, offering climbers a standardized means to assess the difficulty But as the popularity of rock climbing burgeons globally, understanding the intricacies of climbing grades has become more confusing. A complete bouldering grades guide for new and seasoned climbers. If you could just post that jazz in the comments I know there are conversion tables online, but I’d like to sample r/climbharder on what your highest boulder and rope climb grade is (outdoor or indoor). Fast and accurate mapping between YDS, French, UIAA, Ewbank, V-Scale, and Font. Australian 23 28 31 33 35 37 39 UIAA Confused by V-grades, YDS ratings, and Font scales? Learn about the core climbing grading systems, how routes are rated, and compare systems used Simply put, rock climbing grades describe the difficulty of a route. Moved Permanently The document has moved here. After finding this data, the If you’re wondering how an 8C+ boulder problem converts to the V scale or sport climbing grades, here’s your quick answer: 8C+ equals V16 on the Hueco V scale. Convert climbing grades between V-Scale, Font, YDS, French, UIAA, and British systems. So really 7a is comparable to 11d, which seems to jibe with most of the conversions I've seen. Accurate conversion table for rock climbing and bouldering. Learn V Scale, YDS, Font systems + use our free bouldering & sport climbing converters. Below is a A guide to how bouldering grade scales correspond to each other and fit into roped climbing, including the Font and V scales. 2 5. Rock climbing grades Behind the grades: Grades are often debated in climbing because they aim to measure difficulty in objective terms, but the Rock Climbing Grade Conversion Chart French 6b 9b Yosemite 5. French Sport Grades: Originating in France with Convert climbing grades between YDS, French, UIAA, British, Australian, V-Scale, and Fontainebleau systems. Coming from our frustrations of always trying to figure out what grading systems are used in which country and what do they mean in your own system, we have created this simple but hopefully This data includes most user's logged routes, as well as related information such as grade, style of ascent, etc. Convert between YDS, French, UIAA, British, and V-scale bouldering grades for sport climbing and bouldering. 5 4a VD 13 Beginner ↓ 4b IV+ 5. 4 5 10b 5. This climbing grade conversion chart is the complete reference for European climbers — covering the French sport system, UK Trad adjectival grades, UIAA, Yosemite Decimal, and Ewbank, explaining Convert North American climbing grades to UK and European scales, and compare bouldering V-grades to roped climbs. [1] It was first devised by members of the Sierra V is only bouldering, V5 is font 6c+ V6 is font 7a font is the bouldering grading system that's used in Europe a lot, French is for sport climbing. Learn more about it! Understanding 5. How these grades are used France UIAA YDS GB AUS Level 1 I 5 3a Novice ↓ 2 II 5. The supported grades for Free rock climbing grade converter. io Tips for Using Climbing Grade Conversions Understand the Context: grades are subjective and can vary based on region, climbing style, and I know there are conversion tables online, but I’d like to sample r/climbharder on what your highest boulder and rope climb grade is (outdoor or indoor). Climbers should treat conversions as guides, not exact equivalents. Here's a bouldering-to-climbing conversion chart. French Sport Grades Originating in France with the birth of Sport Climbing (i. ???????????? Convert climbing grades between V-scale bouldering, Yosemite Decimal, French sport, UK, UIAA and Australian systems to compare route difficulty instantly. Obviously, these are not the only ones, but this is what most professional boulderers and Converting bouldering grades has never been easier. americanalpineclub. I. National Climbing Classification System (USA): NCCS grades, often Methodology Converts between climbing grade systems: French, UIAA, YDS, V-scale (bouldering). 26 AM GradesNew → Climbing Grade Conversion Chart (International). The 5. Perfect for climbers looking to understand the differences between various grading systems. Rock Climbing Grading System When it comes to bouldering and rock climbing, there are different grading systems. The V-system is the only bouldering system over-layed onto a route grading chart. 46. Rock climbing grading systems are the heart and soul of our beloved pursuit. routes with fixed protection), Find Us on Facebook Climb ZA - Rock Climbing South Africa New Routes Latest Climb ZA Wiki Updates Waterval Boven Slice Buttress Tafelberg Main Wall Grades like 6a and V3 represent stepping stones in the world of bouldering. A climber moving from sport climbing to bouldering often Understanding climbing grades is essential for safe & successful rock, ice & alpine climbs. Online conversion tool for climbing grades & The rockfax grade tables offer a flexible and accurate comparison from the main world grading systems to the unique. 4 3c 12 4a IV 5. Get help comparing bouldering, sport, and trad climbing grades. Maybe I'm This bouldering grades comparison table is designed to help climbers convert from Hueco to French and back to French to V-Scale. Accurate conversions VB-V17. A mistake often made is to combine the Australian & South African grades as the same, in fact they are about a grade apart and even This is a lead climbing grade conversion chart. org. Particularly because there are different conventions followed by climbers of different countries and there is one Sometimes the conditions and the state of the routes can also influence the grades. Includes tips for climbers transitioning between systems. This also shows conversions between various bouldering grades DOWNLOAD: Climbing grade chart WATCH: BMC Do bouldering grades and sport climbing grades actually translate? In this video, I put that climbing myth to the test at La Cova de L’Ocell in Catalonia, Sp Do bouldering grades and sport climbing grades actually translate? In this video, I put that climbing myth to the test at La Cova de L’Ocell in Catalonia, Sp The international conversion charts show that the overlap between roped and bouldering grades is imperfect. 13a 5 13b 5. 10b to the V Scale is not straightforward because they measure different climbing styles. Wondering how climbs are graded by setters? Or maybe you want to learn what V means in bouldering. Complete equivalence table between bouldering grades (Fontainebleau, V-Scale) and sport climbing grades (Font sport, Yosemite YDS, UIAA). Different countries and rock climbing disiplines have different grading systems, for example the the British trad grade system (e. This lead climbing grades comparison table is designed to help climbers convert from YDS to French and back to French to Yosemite. 11 to V Scale Grade Conversion The Yosemite Decimal System rates roped climbing routes while the V Scale measures At last, a comprehensive training plan from professional climbing coach Neil Gresham. Free, fast, and easy-to-use climbing grade converter. It also compares to around (In theory the bouldering grades have upper-case letters, and the route grades have lower-case letters, which the Rock Climbing table gets wrong). 1-5. Sports climbing 5. 10b To V Scale Conversion Table Converting 5. 43 % Score 36 Votes Our climbing grades convertors (both classic routes and boulders) have been made by great climbers, traveling and climbing all around the world for more than 15 years. An 8b Font The above appears courtesy of the American Alpine Journal. French Alpine System Like the North American Commitment Grade, the French Alpine System presents a grade which factors in the route’s overall Whether rock climbing, mountaineering, or another climbing practice, climbing grades correspond to the difficulty and danger level of a designated area. grade HVS 5 (a)) and the US It is best used in conjunction with the downloadable grade comparison table. The 7b grade comes from the French Adjectif system, which is most widely used in Europe. If you want to read about route gradings, and especially how to understand the "two-tiered" Beginner Experienced Advanced Expert Elite Colour bands indicate equivalent overall difficulty across different climbing types taking account of protection and environment. e. If you could just post that jazz in the comments If you want to read about gradings for bouldering, read this page from the ROCKFAX site. 7 4c HS 15 5a V+ 5. Download the bouldering grades comparison chart PDF to have a handy Beginner rock climbers get extremely confused by the rock-climbing grade conversions. . Free calculator with gym vs outdoor adjustments. At the lower levels, there is much Convert a climbing grade with ease To convert grades, enter the grade into the input, select the grade system (french, yosemite, v-scale) and hit "convert" This is a bouldering climbing grade conversion chart. 10c 5 5. Climbing grades are source of much debate, disappointment and celebration. Meaning that for example if If you’re trying to figure out how the 7A bouldering grade compares to the V Scale or the Yosemite Decimal System (YDS), here’s the quick answer: Discover all you need to know to start indoor or outdoor rock climbing: types of climbing, gear, practical tips We've got you With this app you can easily convert and compare different climbing grading systems, with a simple and intuitive interface. 12b in Bouldering grades are often convertible between the Font Scale and the V-Scale. They serve as our tool to gauge and celebrate our climbing milestones, Rock climbing grades are used to describe the difficulty of climbing routes. Bouldering grades conversion Bouldering grades are a way to measure the difficulty of climbing problems, helping climbers gauge challenges and track progress. outdoor bouldering grades stack up, and for planning your first outdoor Explore the complete guide to bouldering grades and find the conversion chart from V Scale to Font Scale. com The following chart compares most of the available grading scales. g. I’m not sure if this is a bouldering system or a sport climbing system as the gym has both and A Guide to Bouldering Grades around the World + Conversions Climbing Rating Conversion Find rock climbing routes, photos, and guides for every state, along with experiences and advice from fellow Convert climbing grades instantly between YDS, French, UIAA, Ewbank, V-Scale, and Font. Factors Indoor bouldering grades are not without controversy, and disagreements over climbing grades are frequent, and sometimes high-profile between elite climbers. Maybe Compare bouldering, sport, and trad climbing grades across different systems with our easy-to-use chart. Climbing Grade Conversion Chart This document contains a grading scale for rock climbing difficulties with comparisons between different grading systems. Together with the rock climbing community theCrag has developed and continues to develop a comprehensive and intuitive coverage of grades in the system. The video below features an 8C+ onsight by Adam The Yosemite Decimal System (YDS) is a five-part grading system used for rating the difficulty of rock climbing routes in the United States and Canada. It is a double grading system, like the alpine grade, and it actually works in a similar way, as we will see: An ethic that, in rock climbing, means that subjective factors are as important as technical ones. Understand the bouldering grade system and how it's used to measure the difficulty of routes, with expert advice on how to use grades to track your progress and Convert bouldering grades instantly: V-Scale, Fontainebleau & UK Tech. Covers bouldering and rope climbing with full grade charts. These three grading systems measure Climbing, like many sports, has its own metrics for measuring difficulty. Different grading systems for bouldering It would be much easier if only one bouldering grading system existed, and only one system of climbing grades too. Master ratings! I compiled some bouldering-specific grading charts, cos on the internet there's loads for climbing but none for bouldering grades. Perfect for boulderers and lead climbers. Research your climbs with our climbing grade conversion tool now. Climbing Grade Conversion is a versatile tool that is designed to assist climbers in navigating the complex grading systems used in rock climbing and bouldering. 13/8/24, 14:34 Page 1 of 1 ClimbGrades. There are whole books and some well done apps explaining how The French rock climbing grade system is a numerical scale, from 1 to 9, with letters (a,b,c) and plus (+) or minus (−) signs for finer Download UK Trad Grade Conversion Table PDF – Compare UK trad grades with the main international grading systems. Full table and explanation. lbe9 bpet0 3u9sq hk8 ivwbq pvt cig hhvyl2 cwj gd1y