ChalkaholicsClimbing calculators
Free calculators for climbers: ape index, grade conversion, training planning. No account needed, everything runs in your browser.
Small helpers for the questions that keep coming up in climbing. Every calculator runs entirely in your browser: nothing is sent, nothing is stored and nothing is analysed. You do not need an account.
Climbing goal calculator
How many ascents at each level below your target grade — following the grade pyramid, without an invented time estimate.
Hangboard calculator
Added weight, assistance and total load on the hangboard — including the loads for submaximal sets.
Climbing grade converter
Fontainebleau, the V scale, French, UIAA and YDS — separated by bouldering and roped climbing, with comparison tables.
Ape index calculator
Arm span against height — and what sports science has actually found out about it.
BMI calculator
Work out your BMI and put it in context — with the limits of the measure instead of a recommendation on how light you should be.