For someone 6 feet 4 inches tall (193 cm), a healthy weight is 68.9 to 92.8 kg by the WHO BMI range, or up to 85.3 kg by the Asian range used in India. Ideal body weight averages 85 kg for a man and 79 kg for a woman.
| Weight (kg) | Weight (lb) | BMI | WHO category | Asian category |
|---|---|---|---|---|
| 59.6 kg | 131 lb | 16 | Underweight | Underweight |
| 63.3 kg | 140 lb | 17 | Underweight | Underweight |
| 68.9 kg | 152 lb | 18.5 | Healthy | Healthy |
| 74.5 kg | 164 lb | 20 | Healthy | Healthy |
| 78.3 kg | 173 lb | 21 | Healthy | Healthy |
| 82 kg | 181 lb | 22 | Healthy | Healthy |
| 85.7 kg | 189 lb | 23 | Healthy | Overweight |
| 89.4 kg | 197 lb | 24 | Healthy | Overweight |
| 93.2 kg | 205 lb | 25 | Overweight | Obese |
| 96.9 kg | 214 lb | 26 | Overweight | Obese |
| 102.5 kg | 226 lb | 27.5 | Overweight | Obese |
| 111.8 kg | 246 lb | 30 | Obese | Obese |
| 121.1 kg | 267 lb | 32.5 | Obese | Obese |
| 130.4 kg | 288 lb | 35 | Obese | Obese |
| 149.1 kg | 329 lb | 40 | Obese | Obese |
At 6 feet 4 inches, overweight starts at 93.2 kg (WHO) or 85.7 kg (Asian cut-off), and obesity at 111.8 kg (WHO) or 93.2 kg (Asian).
| Formula | Man | Woman |
|---|---|---|
| Devine (1974) | 86.8 kg (191 lb) | 82.3 kg (181 lb) |
| Robinson (1983) | 82.4 kg (182 lb) | 76.2 kg (168 lb) |
| Miller (1983) | 78.8 kg (174 lb) | 74.9 kg (165 lb) |
| Hamwi (1964) | 91.2 kg (201 lb) | 80.7 kg (178 lb) |
| Average of the four | 84.8 kg (187 lb) | 78.5 kg (173 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 97 cm (38 inches) at 6'4". Waist-to-height ratio predicts heart and diabetes risk better than BMI alone, especially for South Asian adults.
| Waist-to-height | Waist at 6'4" | Meaning |
|---|---|---|
| Under 0.4 | under 77 cm | May be too slim |
| 0.4 – 0.49 | 77–95 cm | Healthy |
| 0.5 – 0.59 | 97–114 cm | Increased risk |
| 0.6 or more | 116 cm or more | High risk |
A healthy weight for a woman 6 feet 4 inches tall is 69–93 kg (BMI 18.5–24.9), or 69–85 kg for Asian women. Ideal body weight formulas give 75–82 kg.
A healthy weight for a man 6 feet 4 inches tall is 69–93 kg (BMI 18.5–24.9), or 69–85 kg for Asian men. Ideal body weight formulas give 79–91 kg.
At 193 cm, aim for 69–93 kg. Above 93 kg is overweight by WHO standards (86 kg by Asian standards).
6 feet 4 inches is 193 cm (76 inches × 2.54).