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At 5'4" and 300 lbs, your BMI is 51.5, placing you in the Obese Class III category. A BMI of 51.5 falls in the Class III (severe) obesity range (40 and above). Medical guidance is strongly recommended alongside lifestyle changes.
51.5
BMI
Obese Class III
Category
108-145
Healthy range (lbs)
-155 lbs
To healthy high
BMI 51.5: Obese Class III
| BMI | Category | Weight (lbs) | Your Status |
|---|---|---|---|
| Below 18.5 | Underweight | Below 108 lbs | - |
| 18.5 to 24.9 | Normal | 108 to 145 lbs | Goal range |
| 25.0 to 29.9 | Overweight | 146 to 174 lbs | - |
| 30.0+ | Obese | Above 174 lbs | You are here |
Your BMI of 51.5 puts you in the Obese Class III category for someone 5'4".
To reach the upper boundary of the healthy range (145 lbs), you would need to lose approximately 155 lbs. A sustainable rate is 0.5 to 1 lb per week, which means roughly 207 weeks at a moderate calorie deficit.
Keep in mind that BMI does not account for muscle mass. Two people at 5'4" and 300 lbs can have very different body compositions. Body fat percentage is a more precise indicator of health risk.
For someone 5'4", the healthy weight range based on BMI is 108 to 145 lbs. At 108 lbs, BMI is 18.5 (lower boundary of healthy). At 145 lbs, BMI is 24.9 (upper boundary of healthy). Below 108 lbs is underweight; above 145 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 51.5 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 51.5 at 5'4" 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 108 to 145 lbs for someone 5'4".
At 5'4", a weight of 300 lbs gives a BMI of 51.5, which is in the Obese Class III category. The healthy weight range for 5'4" is 108 to 145 lbs. This is above the healthy range. Keep in mind BMI does not account for muscle mass or body composition.
To reach low end (108 lbs)
192 lbs to lose
To reach high end (145 lbs)
155 lbs to lose
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