Health & Wellness
Reliable health calculators to know yourself better: body mass index (BMI), metabolism, water needs and other validated references. For information only, never a substitute for medical advice.
BMI calculator
Calculate your body mass index and see where you stand per the WHO.
Water intake calculator
Estimate your daily water intake.
Calorie calculator
Basal metabolic rate (BMR) and daily need (TDEE).
Sleep calculator
Wake at the end of a 90-minute cycle, not in the middle.
Smoking cost calculator
What smoking costs you — and what quitting earns you.
Ideal weight
Lorentz, Devine, Robinson and BMI range: 4 answers compared.
Body fat percentage
Your fat % with a tape measure: the US Navy method.
BMR calculator
Your calories at rest (Mifflin-St Jeor) and needs by activity level.
Protein intake
Your grams per day by goal, in concrete food equivalents.
Waist-to-hip ratio
Two measurements, a WHO-validated cardio indicator.
Heart rate zones
Your 5 training zones with the Karvonen method.
Running pace
Distance + time → pace, speed and split times.
Blood alcohol estimate
Widmark estimate and theoretical delays — never a green light to drive.
One-rep max calculator
Estimate your one-rep max (1RM) from a weight and a number of reps.
Macro calculator
Split your calories into grams of protein, carbs and fat by diet type.
Waist-to-height ratio
Compute your waist-to-height ratio (WHtR) and see your risk level.
Body surface area (BSA)
Compute your body surface area (BSA) with the Mosteller and Du Bois formulas.
Food product facts
Nutri-Score, NOVA and nutrition of a product from its barcode.
Calorie needs (TDEE)
Calories per day by activity and goal + macro split.
Calories burned
Calories burned by activity, weight and duration (MET values).
Weight loss calculator
Estimate the time and date to reach your target weight at your pace.
A1C calculator
Convert HbA1c (%) to estimated average glucose (mg/dL and mmol/L).
Blood pressure categories
Classify a blood pressure reading (systolic/diastolic) using the AHA categories.
Lean body mass (LBM)
Estimate your lean and fat mass from sex, height and weight.