For someone 5 feet 11 inches tall (180.3 cm), a healthy weight is 60.2 to 81 kg by the WHO BMI range, or up to 74.5 kg by the Asian range used in India. Ideal body weight averages 74 kg for a man and 69 kg for a woman.
| Weight (kg) | Weight (lb) | BMI | WHO category | Asian category |
|---|---|---|---|---|
| 52 kg | 115 lb | 16 | Underweight | Underweight |
| 55.3 kg | 122 lb | 17 | Underweight | Underweight |
| 60.2 kg | 133 lb | 18.5 | Healthy | Healthy |
| 65 kg | 143 lb | 20 | Healthy | Healthy |
| 68.3 kg | 151 lb | 21 | Healthy | Healthy |
| 71.5 kg | 158 lb | 22 | Healthy | Healthy |
| 74.8 kg | 165 lb | 23 | Healthy | Overweight |
| 78.1 kg | 172 lb | 24 | Healthy | Overweight |
| 81.3 kg | 179 lb | 25 | Overweight | Obese |
| 84.6 kg | 186 lb | 26 | Overweight | Obese |
| 89.4 kg | 197 lb | 27.5 | Overweight | Obese |
| 97.6 kg | 215 lb | 30 | Obese | Obese |
| 105.7 kg | 233 lb | 32.5 | Obese | Obese |
| 113.8 kg | 251 lb | 35 | Obese | Obese |
| 130.1 kg | 287 lb | 40 | Obese | Obese |
At 5 feet 11 inches, overweight starts at 81.3 kg (WHO) or 74.8 kg (Asian cut-off), and obesity at 97.6 kg (WHO) or 81.3 kg (Asian).
| Formula | Man | Woman |
|---|---|---|
| Devine (1974) | 75.3 kg (166 lb) | 70.8 kg (156 lb) |
| Robinson (1983) | 72.9 kg (161 lb) | 67.7 kg (149 lb) |
| Miller (1983) | 71.7 kg (158 lb) | 68.1 kg (150 lb) |
| Hamwi (1964) | 77.7 kg (171 lb) | 69.7 kg (154 lb) |
| Average of the four | 74.4 kg (164 lb) | 69.1 kg (152 lb) |
Ideal body weight (IBW) formulas were designed for medicine doses, not as a target, and they ignore frame size and muscle. Use them alongside the healthy BMI range.
Keep your waist under half your height: under 90 cm (35.5 inches) at 5'11". Waist-to-height ratio predicts heart and diabetes risk better than BMI alone, especially for South Asian adults.
| Waist-to-height | Waist at 5'11" | Meaning |
|---|---|---|
| Under 0.4 | under 72 cm | May be too slim |
| 0.4 – 0.49 | 72–88 cm | Healthy |
| 0.5 – 0.59 | 90–106 cm | Increased risk |
| 0.6 or more | 108 cm or more | High risk |
A healthy weight for a woman 5 feet 11 inches tall is 60–81 kg (BMI 18.5–24.9), or 60–74 kg for Asian women. Ideal body weight formulas give 68–71 kg.
A healthy weight for a man 5 feet 11 inches tall is 60–81 kg (BMI 18.5–24.9), or 60–74 kg for Asian men. Ideal body weight formulas give 72–78 kg.
At 180 cm, aim for 60–81 kg. Above 81 kg is overweight by WHO standards (75 kg by Asian standards).
5 feet 11 inches is 180.3 cm (71 inches × 2.54).