Calcolatore del rapporto vita-fianchi
Calcolatore gratuito del rapporto vita-fianchi secondo le linee guida OMS. Inserisci le misure di vita e fianchi per ottenere il tuo RVF e la categoria di rischio cardiovascolare.
Calcola il tuo rapporto vita-fianchi e valuta il rischio per la salute metabolica.
The waist-to-hip ratio (WHR) measures fat distribution. WHR = waist circumference ÷ hip circumference.
What Is the Waist-to-Hip Ratio?
WHR = Waist ÷ Hip (same units). Higher WHR indicates more abdominal fat, associated with greater cardiovascular and metabolic risk.
WHO risk thresholds (males): <0.90 = low, 0.90–0.99 = moderate, ≥1.00 = high. WHO risk thresholds (females): <0.80 = low, 0.80–0.85 = moderate, ≥0.86 = high.
Central obesity thresholds: Males ≥102 cm waist; Females ≥88 cm waist.
How to Use
- Select biological sex.
- Select unit system (metric cm or imperial inches).
- Enter waist circumference (narrowest point, above navel).
- Enter hip circumference (widest point of hips/buttocks).
- Review WHR, risk category, and central obesity risk.
How to Measure
Waist: Stand relaxed, measure at narrowest point about 2 cm above navel. Keep tape horizontal and snug (not tight). Measure at end of normal exhalation.
Hips: Stand with feet together, measure at widest point of hips/buttocks, keeping tape horizontal and parallel to floor.
Examples
Example 1 — Male, low risk: Waist 82 cm, Hip 98 cm → WHR = 82÷98 = 0.84 (low risk; waist 82 < 102 cm threshold)
Example 2 — Male, moderate risk: Waist 94 cm, Hip 100 cm → WHR = 94÷100 = 0.94 (moderate risk)
Example 3 — Female, high risk: Waist 91 cm, Hip 102 cm → WHR = 91÷102 = 0.89 (high risk; waist 91 ≥ 88 cm central obesity)
FAQ
Why is abdominal fat more dangerous? Visceral fat surrounds internal organs and releases inflammatory substances into the bloodstream, increasing risk of diabetes, heart disease, and hypertension.
Is WHR better than BMI? For predicting cardiovascular disease, WHR is often a stronger predictor. The INTERHEART study (Lancet, 2004) found waist-hip ratio was significantly associated with myocardial infarction risk across 52 countries.
Can a person have healthy BMI but unhealthy WHR? Yes. “Metabolically obese normal weight” (MONW) individuals can have normal BMI but excess visceral fat, leading to elevated WHR and metabolic risk.
Can exercise reduce WHR? Yes. Aerobic exercise preferentially reduces visceral fat. Diet changes (reducing refined carbohydrates) also help. Waist circumference typically decreases faster than hip circumference with weight loss.
How often should I check? Every 3–6 months during a weight management programme, or annually as a routine check.