BMI Calculator
Calculate Body Mass Index based on WHO standards in Metric or Imperial units.
Calculate Body Mass Index based on WHO standards in Metric or Imperial units.
Calculate Body Mass Index based on WHO standards in Metric or Imperial units. Calculate exact, penny-accurate projections compliant with 2026 ECB • ISO Standard standards using Calconova's deterministic IEEE-754 (Decimal.js) calculation engine with instant breakdowns.
Scala Standard OMS
Ti trovi nella fascia di peso ideale. Mantienila con una regolare attività fisica.
BMI (Metric) = Weight (kg) / [Height (m)]² | BMI (Imperial) = 703 × Weight (lbs) / [Height (in)]²Developed by mathematician Adolphe Quetelet and adopted by the World Health Organization (WHO) as the global clinical screening standard for weight categories, BMI is calculated by dividing body mass in kilograms by the square of height in meters. Your ideal healthy weight range corresponds to a BMI between 18.5 and 24.9 kg/m².
The metrics and calculations provided by this tool are general statistical approximations and do not substitute for professional medical advice, clinical diagnosis, or individualized diet therapy. Physiological variables and health histories vary widely. Always consult a qualified physician or healthcare provider regarding any health condition.
According to WHO clinical thresholds for adults: below 18.5 is Underweight, 18.5 to 24.9 is Normal/Healthy Weight (associated with the lowest morbidity risk), 25.0 to 29.9 is Overweight (pre-obese), 30.0 to 34.9 is Class I Obesity, and 35.0 or higher indicates Class II/III Severe Obesity.
No. BMI measures total weight relative to height and cannot differentiate between lean skeletal muscle and adipose fat tissue. Consequently, muscular athletes and bodybuilders may register a BMI above 25 ('overweight') despite having very low body fat. Combining BMI with Waist-to-Hip Ratio or Body Fat Percentage provides a complete picture.
Our calculator reverses the WHO healthy BMI bounds (18.5 to 24.9) for your specific height. By multiplying your height in meters squared by 18.5 for the lower bound and by 24.9 for the upper bound, it pinpoints the exact kilogram or pound range associated with optimal metabolic health.
The mathematical BMI formula is identical for adult men and women aged 20 and older. However, women naturally carry a higher essential body fat percentage than men at the same BMI, and for seniors over 65, a slightly higher BMI (23–27) is often clinically protective against frailty. For children and teens (ages 2–19), age- and sex-specific growth percentiles must be used instead.
No. While many basic calculators use a rounded 703 approximation factor in Imperial mode, Calconova converts feet/inches and pounds using exact international NIST constants (1 inch = 0.0254 m and 1 lb = 0.45359237 kg) via Decimal.js, guaranteeing identical clinical precision in both unit systems.
Clinical nutrition guidelines recommend a sustainable caloric deficit or surplus of 300–500 kcal per day relative to your Total Daily Energy Expenditure (TDEE), targeting a steady change of 0.5–1 kg (1–2 lbs) per week. You can pair this tool with our BMR and TDEE Calculators to plan your daily calorie and protein targets safely.
Calcola il tuo tasso metabolico basale (BMR) con le formule Mifflin-St Jeor, Harris-Benedict e Katch-McArdle.
Determina il range di peso corporeo ideale secondo le formule Robinson, Miller, Devine e Hamwi.
Calcola il consumo calorico giornaliero totale in base al tuo livello di attività per dimagrire o aumentare massa.