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At 5'6" and 340 lbs, your BMI is 54.9, placing you in the Obese Class III category. A BMI of 54.9 falls in the Class III (severe) obesity range (40 and above). Medical guidance is strongly recommended alongside lifestyle changes.
54.9
BMI
Obese Class III
Category
115-154
Healthy range (lbs)
-186 lbs
To healthy high
BMI 54.9: Obese Class III
| BMI | Category | Weight (lbs) | Your Status |
|---|---|---|---|
| Below 18.5 | Underweight | Below 115 lbs | - |
| 18.5 to 24.9 | Normal | 115 to 154 lbs | Goal range |
| 25.0 to 29.9 | Overweight | 155 to 185 lbs | - |
| 30.0+ | Obese | Above 185 lbs | You are here |
Your BMI of 54.9 puts you in the Obese Class III category for someone 5'6".
To reach the upper boundary of the healthy range (154 lbs), you would need to lose approximately 186 lbs. A sustainable rate is 0.5 to 1 lb per week, which means roughly 248 weeks at a moderate calorie deficit.
Keep in mind that BMI does not account for muscle mass. Two people at 5'6" and 340 lbs can have very different body compositions. Body fat percentage is a more precise indicator of health risk.
For someone 5'6", the healthy weight range based on BMI is 115 to 154 lbs. At 115 lbs, BMI is 18.5 (lower boundary of healthy). At 154 lbs, BMI is 24.9 (upper boundary of healthy). Below 115 lbs is underweight; above 154 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 54.9 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 54.9 at 5'6" places you in the Obese Class III 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 115 to 154 lbs for someone 5'6".
At 5'6", a weight of 340 lbs gives a BMI of 54.9, which is in the Obese Class III category. The healthy weight range for 5'6" is 115 to 154 lbs. This is above the healthy range. Keep in mind BMI does not account for muscle mass or body composition.
To reach low end (115 lbs)
225 lbs to lose
To reach high end (154 lbs)
186 lbs to lose
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