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At 5'2" and 170 lbs, your BMI is 31.1, placing you in the Obese Class I category. A BMI of 31.1 falls in the Class I obesity range (30 to 34.9). Health risks are elevated. A structured nutrition and activity plan can make a significant difference.
31.1
BMI
Obese Class I
Category
101-136
Healthy range (lbs)
-34 lbs
To healthy high
BMI 31.1: Obese Class I
| BMI | Category | Weight (lbs) | Your Status |
|---|---|---|---|
| Below 18.5 | Underweight | Below 101 lbs | - |
| 18.5 to 24.9 | Normal | 101 to 136 lbs | Goal range |
| 25.0 to 29.9 | Overweight | 137 to 163 lbs | - |
| 30.0+ | Obese | Above 163 lbs | You are here |
Your BMI of 31.1 puts you in the Obese Class I category for someone 5'2".
To reach the upper boundary of the healthy range (136 lbs), you would need to lose approximately 34 lbs. A sustainable rate is 0.5 to 1 lb per week, which means roughly 46 weeks at a moderate calorie deficit.
Keep in mind that BMI does not account for muscle mass. Two people at 5'2" and 170 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 5'2", the healthy weight range based on BMI is 101 to 136 lbs. At 101 lbs, BMI is 18.5 (lower boundary of healthy). At 136 lbs, BMI is 24.9 (upper boundary of healthy). Below 101 lbs is underweight; above 136 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 31.1 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 31.1 at 5'2" places you in the Obese Class I 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 101 to 136 lbs for someone 5'2".
To reach low end (101 lbs)
69 lbs to lose
To reach high end (136 lbs)
34 lbs to lose
BMI tells you where you are. FitCommit shows you what to do about it. AI body scanning estimates your body fat percentage and lean mass. Food camera scanning tracks your nutrition automatically. Free 7-day trial.
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