Bouldering Grade Conversion Calculator

On paper, boulder grades seem easy enough: a V6 is a V6. But when you wander into a new gym or visit a place for the first time, those grades gets slippery. What’s one person’s V6 can be another’s V7, and the European Fontainebleau scale tend to be a notch or two different than our more common V-scale in America. That can make a big difference if you’re setting reasonable goals for your season or even planning a trip.

Plug the system you are converting from, your current grade, and some information on how you got that grade into converter above. It will crunch numbers and provide an adjusted range for project, flash, and warm-up, rather than just one neat number.

How to Use the Climbing Grade Converter

There’s reason for the inputs: Grading doesn’t come off a table. What the grade really means in practice shift depending on situation. It changes when a problem play to your strength, when you have a soft gym set, or when you are sandbagging outside. While V- and Fontainebleau grades is closest on scale, it’s all about margins.

The calculator lowers your expectations if you’ve been climbing at a gym with softer than outdoor grading. It raise them if you’re going to an area where power doesn’t work as well as precise footwork, like many Font circuits does. Those tweaks won’t be right for everyone but they’ll prevent you from taking any one converted grade as gospel. This is why I put those reference tables on the page.

Not only do they display how color bands and Dankyu numbers aligns with V grades, but they help you remember that while one grade of drift is normal, two grades usually signals unusually soft or stiff grading. Typically two grades of drift mean there is some sort of style mismatch large enough to make it feel completely different, or they are using unusually stiff or unusually soft material. The calculator just lets you see this without guessing at it.

People get tripped up most often because they assume their strong grade are portable. Just because you can do a powerful V8 on a steep board doesn’t mean it translate to a V8 slab or a V8 coordination problem. The calculator has a small feature called a personal fit setting that tries to reflect this reality by nudging the project range up or down to match your style better. It’s a small correction but could of keep you from stacking too many problems of same sort in a single session.

When used correctly, the tool transforms grade conversion into a quick planning exercise rather than a guessing game. Choose your starting grade. Consider where that grade came from. Compare it to the recommended range of grades for both long project and warm-ups. It’s not intended to be a replacement for repeated sends or local knowledge; rather, the output provide a more defined starting place than a static chart.