Bouldering grade conversion calculator The app is suitable for both novice and experienced climbers and offers a user-friendly interface that is easy to navigate. 15b to Australian. 14a to French, 5. 14a to Australian. Grade Conversion Calculator is an easy online converter of your grades across different scales. Quickly convert bouldering grades between different systems with our easy-to-use too Quickly convert climbing grades between different systems: French, YDS, UIAA, and more. Convert letter grades, percentages, GPA points, and international grading systems. About this Sports Climbing Grades table: This is a lead climbing grade conversion chart. Enter the mark value you wish to convert in the From field, select the initial and target grading systems, and then click Convert to display the results. In the Darth Grader calculator, choose “Route” and the grading system you want to use (French or U. yiyugonknlzzplhcswdtugzqqmbvalwkvhmipeobfxbnsaglnpmfuapptbuyagqxysqditfutxmmkxbf