For someone 6 feet 6 inches tall (198.1 cm), a healthy weight is 72.6 to 97.7 kg by the WHO BMI range, or up to 89.9 kg by the Asian range used in India. Ideal body weight averages 89 kg for a man and 82 kg for a woman.
| Weight (kg) | Weight (lb) | BMI | WHO category | Asian category |
|---|---|---|---|---|
| 62.8 kg | 138 lb | 16 | Underweight | Underweight |
| 66.7 kg | 147 lb | 17 | Underweight | Underweight |
| 72.6 kg | 160 lb | 18.5 | Healthy | Healthy |
| 78.5 kg | 173 lb | 20 | Healthy | Healthy |
| 82.4 kg | 182 lb | 21 | Healthy | Healthy |
| 86.4 kg | 190 lb | 22 | Healthy | Healthy |
| 90.3 kg | 199 lb | 23 | Healthy | Overweight |
| 94.2 kg | 208 lb | 24 | Healthy | Overweight |
| 98.1 kg | 216 lb | 25 | Overweight | Obese |
| 102.1 kg | 225 lb | 26 | Overweight | Obese |
| 107.9 kg | 238 lb | 27.5 | Overweight | Obese |
| 117.8 kg | 260 lb | 30 | Obese | Obese |
| 127.6 kg | 281 lb | 32.5 | Obese | Obese |
| 137.4 kg | 303 lb | 35 | Obese | Obese |
| 157 kg | 346 lb | 40 | Obese | Obese |
At 6 feet 6 inches, overweight starts at 98.1 kg (WHO) or 90.3 kg (Asian cut-off), and obesity at 117.8 kg (WHO) or 98.1 kg (Asian).
| Formula | Man | Woman |
|---|---|---|
| Devine (1974) | 91.4 kg (202 lb) | 86.9 kg (192 lb) |
| Robinson (1983) | 86.2 kg (190 lb) | 79.6 kg (175 lb) |
| Miller (1983) | 81.6 kg (180 lb) | 77.6 kg (171 lb) |
| Hamwi (1964) | 96.6 kg (213 lb) | 85.1 kg (188 lb) |
| Average of the four | 88.9 kg (196 lb) | 82.3 kg (181 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 99 cm (39 inches) at 6'6". Waist-to-height ratio predicts heart and diabetes risk better than BMI alone, especially for South Asian adults.
| Waist-to-height | Waist at 6'6" | Meaning |
|---|---|---|
| Under 0.4 | under 79 cm | May be too slim |
| 0.4 – 0.49 | 79–97 cm | Healthy |
| 0.5 – 0.59 | 99–117 cm | Increased risk |
| 0.6 or more | 119 cm or more | High risk |
A healthy weight for a woman 6 feet 6 inches tall is 73–98 kg (BMI 18.5–24.9), or 73–90 kg for Asian women. Ideal body weight formulas give 78–87 kg.
A healthy weight for a man 6 feet 6 inches tall is 73–98 kg (BMI 18.5–24.9), or 73–90 kg for Asian men. Ideal body weight formulas give 82–97 kg.
At 198 cm, aim for 73–98 kg. Above 98 kg is overweight by WHO standards (90 kg by Asian standards).
6 feet 6 inches is 198.1 cm (78 inches × 2.54).