The toolkit
All 10 BJJ calculators
Every BJJMath tool in one place, grouped by what you’re working on. Each one shows its source and links to the full methodology.
IBJJF-SourcedSports-Medicine CitedSources Cited
Competition
Rules, weigh-ins and scoring
01
IBJJF Weight Class Finder
Find your gi division by weight and sex.
Open calculator 02Tournament Weight Cut Planner
Plan a safe cut to your target division.
Open calculator 03IBJJF Points Calculator
Score a live match — points, advantages, subs.
Open calculator 04IBJJF Age Division Lookup
Birth year to Juvenile / Adult / Master bracket.
Open calculatorGear & Sizing
Getting the gi right
Health & Training
Fuel, recovery and progress
07
Caloric Needs for Grapplers
Calories + macros for your training week.
Open calculator 08Belt Promotion Timeline Estimator
A realistic range to your next belt.
Open calculator 09Return-to-Roll Calculator
A recovery-timeline starting point by injury.
Open calculator 10Training Load Calculator
Read load vs recovery from sleep and age.
Open calculator