Health Calculators
Evidence-based estimates for body mass index, daily energy needs and hydration, in metric or imperial units. They are a starting point for a conversation with a professional, not a diagnosis.
3 free tools · no signup · runs in your browser
BMI Calculator
Body mass index with WHO category and healthy weight range.Calorie Calculator
Daily calorie needs with the Mifflin–St Jeor equation.Water Intake Calculator
Daily water target from your weight, activity and climate.Which health tool do you need?
These three tools work well together: check your BMI against the WHO ranges, estimate your daily energy needs with the calorie calculator, and set a realistic hydration target with the water intake calculator. Each page explains the formula it uses and cites its source.