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Medical BMI Calculator (Body Mass Index)

BMI Calculation & Risk Assessment

Determine your BMI index, target weight range, and eligibility for incretin pharmacotherapy (Retatrutide / Tirzepatide) according to WHO and ADA guidelines.

Anthropometric Data

Clinical calculation

Height (cm)175 cm

130 cm175 cm220 cm

Current Weight (kg)92.5 kg

35 kg100 kg220 kg

Gender

Age (years)

Waist Circumference (cm) (for visceral fat assessment)

Has concomitant metabolic disorders (T2D, hypertension, dyslipidemia, or NAFLD)

WHO Asia-Pacific criteria:

Calculation Result

30.2kg/m²

Class I Obesity

1518.5 (Normal)25303540+

Moderate obesity with increasing risk of cardiometabolic complications.

Normal Weight (BMI 18.5–24.9)

56.7 – 76.3 kg

Exceeds upper normal bound by 16.2 kg

Ideal Weight (Devine Formula)

~70.5 kg

Calculated for men 175 cm tall

Waist-to-Height Ratio (WtHR): 0.56

Increased abdominal risk (level: Moderate)

Risk >0.50

Incretin Pharmacotherapy Criteria (Retatrutide / GLP-1/GIP)

Meets ADA/AACE criteria

Direct clinical indication for incretin mimetics (Retatrutide / Tirzepatide).

TRIUMPH trial inclusion criteria: BMI ≥ 30 kg/m² OR BMI ≥ 27 kg/m² with at least one weight-related comorbidity.

WHO Body Mass Classification

Standard BMI ranges

Category	BMI Range (kg/m²)	Comorbidity Risk	Clinical Recommendations
Severe Underweight	< 16.0	Moderate	Medical examination required to rule out nutritional deficiency and somatic pathology.
Underweight	16 – 18.49	Moderate	Dietary adjustment recommended to achieve target normosthenic weight.
Normal Weight	18.5 – 24.99	Minimal	Maintain current caloric balance and regular physical activity.
Overweight (Pre-obesity)	25 – 29.99	Moderate	Lifestyle modification, dietary changes, and increased aerobic exercise.
Class I Obesity	30 – 34.99	High / Very high	Comprehensive approach: hypocaloric diet, exercise, pharmacotherapy consideration.
Class II Obesity	35 – 39.99	High / Very high	Active medical therapy and endocrinological management recommended.
Class III Obesity (Morbid)	≥ 40.0	High / Very high	Intensive pharmacotherapy and multidisciplinary management indicated (consider bariatrics if ineffective).