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At 6'3" and 310 lbs, your BMI is 38.7, placing you in the Obese Class II category. A BMI of 38.7 falls in the Class II obesity range (35 to 39.9). This level is associated with higher risk of cardiovascular disease, type 2 diabetes, and joint issues.
38.7
BMI
Obese Class II
Category
148-199
Healthy range (lbs)
-111 lbs
To healthy high
BMI 38.7: Obese Class II
| BMI | Category | Weight (lbs) | Your Status |
|---|---|---|---|
| Below 18.5 | Underweight | Below 148 lbs | - |
| 18.5 to 24.9 | Normal | 148 to 199 lbs | Goal range |
| 25.0 to 29.9 | Overweight | 200 to 239 lbs | - |
| 30.0+ | Obese | Above 239 lbs | You are here |
Your BMI of 38.7 puts you in the Obese Class II category for someone 6'3".
To reach the upper boundary of the healthy range (199 lbs), you would need to lose approximately 111 lbs. A sustainable rate is 0.5 to 1 lb per week, which means roughly 148 weeks at a moderate calorie deficit.
Keep in mind that BMI does not account for muscle mass. Two people at 6'3" and 310 lbs can have very different body compositions. Body fat percentage is a more precise indicator of health risk.
BMI is a useful screening tool but has real limitations. It does not distinguish between muscle and fat, so muscular athletes often show elevated BMI despite low body fat. It also does not account for where fat is stored. Waist-to-height ratio and body fat percentage are more precise measures. Use BMI as a starting point, not a definitive health verdict.
For someone 6'3", the healthy weight range based on BMI is 148 to 199 lbs. At 148 lbs, BMI is 18.5 (lower boundary of healthy). At 199 lbs, BMI is 24.9 (upper boundary of healthy). Below 148 lbs is underweight; above 199 lbs is overweight.
BMI only uses height and weight. Body fat percentage measures actual fat tissue as a proportion of total weight, making it more precise for body composition assessment. Two people with the same BMI of 38.7 can have very different body fat percentages depending on muscle mass. Athletes often have BMI values above 25 while maintaining low body fat. Use body fat percentage to set specific fitness goals.
A BMI of 38.7 at 6'3" places you in the Obese Class II category. BMI (Body Mass Index) is calculated by dividing weight in pounds by height in inches squared, then multiplying by 703. The healthy range is 18.5 to 24.9, which translates to 148 to 199 lbs for someone 6'3".
To reach low end (148 lbs)
162 lbs to lose
To reach high end (199 lbs)
111 lbs to lose
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