Health Calculators
Estimate body metrics and daily needs. These are educational tools using standard formulas (WHO, Mifflin-St Jeor, Karvonen) — not medical advice.
BMI Calculator
Body Mass Index from weight and height, with the WHO category.
BMR Calculator
Basal metabolic rate, maintenance calories (TDEE) and a fat-loss target.
Heart Rate Calculator
Five personalised training zones based on your resting heart rate.
Exercise Calorie Calculator
Calories burned by activity, based on MET values and your body weight.
Water Intake Calculator
A daily hydration target adjusted for your activity and climate.