Interactive knowledge centre
Tools & calculators
Every calculator shows its formula, units, source and limitations. They produce population-level estimates, not clinical measurements, and they do not diagnose any condition.
Body composition & energy
Live
BMR & TDEE calculator
Estimate resting and total daily energy expenditure (Mifflin–St Jeor).
LiveBMI & waist-to-height ratio
Body mass index (WHO and Asian cut-offs) and waist-to-height ratio.
Planned
Waist-to-hip ratio
Planned
Body fat estimation (skinfold / circumference)
Planned
Calorie deficit planner
Training
Live
Heart rate zone calculator
Target heart rates from %HRmax and heart rate reserve (Karvonen), with ACSM categories.
LiveOne-rep max estimator
Estimate 1RM from a set to failure (Epley and Brzycki) and build a %1RM table.
Planned
Training volume calculator
Planned
Running pace calculator
Planned
Training load tracker (session-RPE, ACWR)
Nutrition
Planned
Macronutrient calculator
Planned
Protein requirement calculator
Planned
Hydration / sweat-rate estimator
Performance
Planned
VO₂ max field-test estimators
Planned
MET energy-expenditure calculator
Planned
Work-to-rest ratio planner
Planned