Martial Arts Calculators

Belt timelines, weight classes, sparring volume and reach. 9 calculators for combat sport athletes. General conditioning sits under Fitness and Sports.

Belt progression scales a base timeline that assumes three sessions a week, but it keeps the minimum waiting periods, and that is the honest part. Most federations enforce time in grade regardless of ability, so training six days a week does not halve the road to black belt. Shotokan karate runs about four to five years to first dan. Brazilian Jiu-Jitsu takes considerably longer, because its belts each cover much wider ground.

Reach advantage works in ape index, which is reach minus height. Most people sit near zero, since arm span roughly equals height. Past +10 cm is genuinely rare. Jon Jones is 193 cm tall with a 215 cm reach, so +22, and that is a large part of why range control came so easily to him.

Weight class and sparring volume pages assume sensible cutting. Neither models a hard water cut, because nothing should encourage one.

Punch power is an estimate built from mass and velocity, not a force-plate reading. It is useful for comparing two of your own numbers across a training block. It is not evidence to bring to an argument in the gym.