BMI Result: 4ft 7in, 170 lbs (BMI 39.5) - Female
According to CDC and WHO standards, a BMI of 39.5 is classified as Obese.
A female who is 4ft 7in tall and weighs 170lbs has a BMI of 39.5, which falls into the Obese category used by the CDC and WHO for adults.
| Category | BMI Range |
|---|---|
| Underweight | < 18.5 |
| Obese | ≥ 30 |
| Obese | ≥ 30 |
Healthy weight range for 4ft 7in: 80 lbs – 107 lbs
Metric: 139.7 cm, 77.1 kg
📏 Healthy waist circumference for your height: 30" – 35" (below 35" for female)
So you're 4ft 7in and weigh 170lbs. Your BMI is 39.5, which falls into the Obese category according to CDC and WHO standards. Let's break down what this means for your health.
Adjust Your Numbers
Change your height or weight to see how your BMI changes.
Understanding Your BMI
A BMI of 30 or above indicates obesity. The CDC reports that this range is associated with a 50-60% higher risk of cardiovascular disease and type 2 diabetes. Comprehensive lifestyle intervention and medical guidance are strongly recommended.
What This Means for Your Height
For women under 5ft 2in, waist-to-height ratio is particularly important. Research suggests that even at a normal BMI, a waist-to-height ratio above 0.5 may indicate increased health risks.
Weight & Threshold
Gaining approximately 2.2 lbs would bring your BMI to 40, the start of the next category.
⬇️ Losing approximately 40.9 lbs would bring you to the Overweight BMI threshold.
Waist & Health
The CDC recommends that non-pregnant women keep waist circumference below 35 inches. A waist-to-height ratio below 0.5 is also associated with lower health risks.
Age Context
For adults 45-64, metabolic health becomes increasingly important. At 49 years old, a woman at 4ft 7in and 170lbs has a BMI of 39.5, which falls into the Obese category.
At age 49, maintaining a healthy weight is particularly important. Research shows that adults over 45 with a BMI in the obese range have a significantly higher risk of metabolic syndrome and cardiovascular disease.
👉 Calculate your Body Fat Percentage for a more complete health assessment.
👉 Try our Athlete BMI Calculator if you have higher muscle mass.
Health Analysis
Recommendations
General Health
A BMI of 39.5 is in the obesity range defined by the CDC and WHO. This range is associated with a higher risk of cardiovascular disease and type 2 diabetes. Comprehensive lifestyle intervention and medical guidance are strongly recommended.
Monitoring
In addition to BMI, pay attention to waist circumference. The CDC recommends females stay under 35 inches. Regular tracking of your measurements over time provides the most useful insight into your health trends.
Next Steps
If you're concerned about your weight or body composition, a healthcare provider can offer personalized guidance based on your full health profile.
Personalized Notes
Diet & Nutrition
At 4ft 7in and 170lbs, a BMI of 39.5 falls into the obesity category for women. Working with a registered dietitian to create a sustainable meal plan is recommended. Focus on whole, unprocessed foods and gradual changes.
Physical Activity
For a woman at 4ft 7in, start with low-impact activities like swimming or stationary cycling to protect your joints while building stamina. Consult your doctor before starting any new exercise program.
Frequently Asked Questions
How common is a BMI of 39.5 for a 4ft 7in woman?
Am I at a healthy weight at 4ft 7in and 170lbs?
What is the BMI for a 4ft 7in woman at 170lbs?
How does a BMI of 39.5 affect health for a 4ft 7in woman?
Related Tools & Articles
💡 About this calculation: BMI = (170 × 703) ÷ (55 × 55) = 39.5 | Metric: 139.7 cm, 77.1 kg
📖 Recommended reading:
Editorial Review: This page was generated by the BMI Calculator Web Editorial Team and reviewed at template and content-pool level for accuracy and guideline alignment by Dr. Sarah K. Johnson, PhD, RD. All content is aligned with current WHO, CDC, and NIH guidelines.
Published: 2026-06-28