Why no cross-system conversion table is offered
Tables that move a climbing grade from one system to another disagree with each other. Sources exist that map the same American grade to two different French grades, and at least one states plainly that boulder grades cannot be converted to rope grades at all. This page therefore offers no conversion table. Instead you paste the list your own gym or guidebook uses, and the page counts positions inside that list only.
How the counting works
The current and target grades are located in your list, the gap between those positions becomes the number of steps, and that is multiplied by the sessions you spend on one step to give total sessions. Dividing by sessions per week gives a figure rounded up, so it never comes out short. No official standard exists for sessions per step or per week, so neither is hard-coded and both are values you type in (as of October 2026).
What this page does not do
It does not estimate your current grade from strength tests, and it does not take a training frequency alone and predict the time to the next grade from built-in assumptions. The output is arithmetic on the session figures you entered, not a forecast. The grade list is not supplied either, so copy the ladder from the source you already use.
Frequently Asked Questions
Conversion tables disagree between sources, so none is offered. The same grade is mapped to two different values in different references, and some state that boulder and rope grades cannot be converted.
Enter the grades in the order your gym or guidebook prints them, lowest first, one per line. Separating them with commas reads the same way.
No. It simply multiplies the sessions per step you entered by the number of steps, so it is not a forecast. No official standard for time per grade exists.