BMI Result: 6ft 6in, 171 lbs (BMI 19.8) - Female
According to CDC and WHO standards, a BMI of 19.8 is classified as Normal.
A female who is 6ft 6in tall and weighs 171lbs has a BMI of 19.8, which falls into the Normal category used by the CDC and WHO for adults.
| Category | BMI Range |
|---|---|
| Underweight | < 18.5 |
| Normal | 18.5 – 24.9 |
| Obese | ≥ 30 |
Healthy weight range for 6ft 6in: 160 lbs – 216 lbs
Metric: 198.1 cm, 77.6 kg
📏 Healthy waist circumference for your height: 30" – 35" (below 35" for female)
So you're 6ft 6in and weigh 171lbs. Your BMI is 19.8, which falls into the Normal 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 in the 18.5-24.9 range is considered healthy by CDC and WHO standards. This range is associated with the lowest risk of cardiovascular disease and type 2 diabetes.
What This Means for Your Height
For women over 5ft 11in, BMI may slightly underestimate body fat due to higher bone density. Muscle mass is also a factor—consider body fat percentage as a complementary measure.
Weight & Threshold
Gaining approximately 45.0 lbs would bring your BMI to 25, the start of the next category.
⬆️ Gaining approximately 45.0 lbs would put you in the Overweight BMI range.
⬇️ Losing approximately 11.3 lbs would bring you to the Underweight 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 in early to middle adulthood (20-44), BMI is a reliable screening tool. At 43 years old, a woman at 6ft 6in and 171lbs has a BMI of 19.8, which falls into the Normal category according to CDC and WHO standards.
Your BMI is within the healthy range. Maintaining balanced nutrition and regular physical activity will help sustain this.
👉 Check your Healthy Weight Range for more context.
👉 Measure your Body Fat Percentage for a more complete picture.
Health Analysis
Recommendations
General Health
A BMI of 19.8 is within the normal range defined by the CDC and WHO. Staying within this range is generally associated with lower rates of chronic conditions compared to higher or lower BMI categories.
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
Monitoring
At 6ft 6in and 171lbs, check your BMI every 4-6 weeks. For women at this height, the CDC recommends keeping waist circumference below 35 inches. Waist-to-height ratio below 0.5 is also a useful health indicator.
Physical Activity
For a woman at 6ft 6in and 171lbs, regular physical activity that you enjoy, combined with activities that maintain muscle strength, supports overall health. Walking, swimming, or cycling are excellent choices.
Frequently Asked Questions
What else should I track besides BMI for a 6ft 6in woman?
What is the BMI for a 6ft 6in woman at 171lbs?
What percentage of women have a BMI of 19.8 at 6ft 6in?
What health risks are associated with a BMI of 19.8 for a 6ft 6in woman?
Related Tools & Articles
💡 About this calculation: BMI = (171 × 703) ÷ (78 × 78) = 19.8 | Metric: 198.1 cm, 77.6 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: 2026-10-13