Reference Charts
BMI Chart — Body Mass Index by Height & Weight
Look up your BMI from the full colour-coded chart, or enter your height and weight for a personalised BMI calculation. Includes WHO category ranges. Supports metric (cm/kg) and imperial (ft/in and lbs).
Personal BMI Lookup
Enter details to highlight your position in the chart
Unit System
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BMI
BMI Chart — Height vs Weight
Underweight <18.5
Normal 18.5–24.9
Overweight 25–29.9
Obese I 30–34.9
Obese II+ ≥35
BMI Category Table
| Category | BMI Range | Health Risk |
|---|---|---|
| Underweight | < 18.5 | Increased (malnutrition, bone loss) |
| Normal Weight | 18.5 – 24.9 | Lowest |
| Overweight | 25.0 – 29.9 | Slightly increased |
| Obese Class I | 30.0 – 34.9 | Moderate |
| Obese Class II | 35.0 – 39.9 | High |
| Obese Class III | ≥ 40.0 | Very High |
Frequently Asked Questions
WHO categories: Underweight <18.5, Normal 18.5–24.9, Overweight 25–29.9, Obese I 30–34.9, Obese II 35–39.9, Obese III ≥40. BMI 18.5–24.9 is associated with lowest all-cause mortality in population studies. Important caveat: BMI doesn't measure body fat directly — very muscular individuals can have BMI in the 25–30 range despite excellent body composition.
No — BMI is a poor measurement for athletes and muscular individuals. Since muscle weighs more than fat per unit volume, a lean muscular person can have BMI 27–30+ despite <15% body fat. Example: a 1.80m man at 90 kg with 10% body fat has BMI 27.8 (classified 'overweight') despite being clearly lean. For muscular individuals, use FFMI, DEXA scan, or Navy body fat formula for more accurate assessment.
BMI of exactly 25.0 is the WHO threshold between normal weight and overweight. For a 1.75m person: BMI 25 = 76.6 kg / 168.8 lbs. For a 1.80m person: BMI 25 = 81 kg / 178.5 lbs. A BMI between 25–27 is associated with minimal additional health risk vs normal weight in most studies — risk increases meaningfully above BMI 30. Waist circumference is a better metabolic risk predictor than BMI in the 25–30 range.
Standard WHO BMI cut-points are the same for men and women: 18.5–24.9 = healthy. However, women naturally carry more body fat than men at the same BMI — a man and woman at BMI 22 will have different body fat percentages (typically 15–18% vs 22–25% respectively). Some researchers have proposed sex-adjusted BMI thresholds, but clinical guidelines currently use the same ranges for both sexes. Age also matters — BMI underestimates fat in older adults who lose muscle mass.