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At 6'0" and 120 lbs, your BMI is 16.3, placing you in the Underweight category. A BMI of 16.3 falls in the underweight range (below 18.5). This may indicate insufficient body mass for your height. Consulting a healthcare provider is recommended.
16.3
BMI
Underweight
Category
136-184
Healthy range (lbs)
+16 lbs
To healthy low
BMI 16.3: Underweight
| BMI | Category | Weight (lbs) | Your Status |
|---|---|---|---|
| Below 18.5 | Underweight | Below 136 lbs | You are here |
| 18.5 to 24.9 | Normal | 136 to 184 lbs | Goal range |
| 25.0 to 29.9 | Overweight | 185 to 221 lbs | - |
| 30.0+ | Obese | Above 221 lbs | - |
Your BMI of 16.3 puts you in the Underweight category for someone 6'0".
To reach the lower boundary of the healthy range (136 lbs), you would need to gain approximately 16 lbs. A safe rate of weight gain is 0.5 to 1 lb per week through a calorie surplus combined with resistance training to prioritize lean mass.
Keep in mind that BMI does not account for muscle mass. Two people at 6'0" and 120 lbs can have very different body compositions. Body fat percentage is a more precise indicator of health risk.
You would need to gain approximately 16 lbs to reach the low end of the healthy range. The healthy BMI range (18.5 to 24.9) corresponds to 136 to 184 lbs for someone 6'0". A sustainable rate of weight loss is 0.5 to 1 lb per week through a calorie deficit of 250 to 500 calories per day.
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 6'0", the healthy weight range based on BMI is 136 to 184 lbs. At 136 lbs, BMI is 18.5 (lower boundary of healthy). At 184 lbs, BMI is 24.9 (upper boundary of healthy). Below 136 lbs is underweight; above 184 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 16.3 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.
To reach low end (136 lbs)
16 lbs to gain
To reach high end (184 lbs)
64 lbs to gain
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