BMI Result: 6ft 1in, 140 lbs (BMI 18.5) - Female
According to CDC and WHO standards, a BMI of 18.5 is classified as Underweight.
A female who is 6ft 1in tall and weighs 140lbs has a BMI of 18.5, which falls into the Underweight category used by the CDC and WHO for adults.
| Category | BMI Range |
|---|---|
| Underweight | < 18.5 |
| Underweight | < 18.5 |
| Obese | ≥ 30 |
Healthy weight range for 6ft 1in: 140 lbs – 189 lbs
Metric: 185.4 cm, 63.5 kg
📏 Healthy waist circumference for your height: 30" – 35" (below 35" for female)
So you're 6ft 1in and weigh 140lbs. Your BMI is 18.5, which falls into the Underweight category according to CDC and WHO standards. Let's break down what this means for your health.
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Change your height or weight to see how your BMI changes.
Understanding Your BMI
A BMI below 18.5 may indicate nutritional insufficiency. According to the CDC, this range is associated with increased risk of bone density loss and immune function decline. Consulting a healthcare provider is recommended for a thorough nutritional assessment.
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 49.3 lbs would bring your BMI to 25, the start of the next category.
⬆️ Gaining approximately 49.3 lbs would put you in the Overweight BMI range.
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 21 years old, a woman at 6ft 1in and 140lbs has a BMI of 18.5, 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 18.5 is below the CDC and WHO healthy range of 18.5-24.9. This may indicate nutritional insufficiency. Consulting a healthcare provider is recommended for a thorough nutritional assessment.
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
Goals
For a woman at 6ft 1in, the CDC recommends a healthy weight range of 140-188lbs. At 140lbs, you're below this range. Consider setting a goal to gain 5-10% of your current weight over the next 3-6 months.
Health Risks
With a BMI of 18.5 for a 6ft 1in woman, the underweight range is associated with increased risk of bone density loss and immune function decline. Consulting a healthcare provider is recommended for a thorough nutritional assessment.
Frequently Asked Questions
How common is a BMI of 18.5 for a 6ft 1in woman?
Am I at a healthy weight at 6ft 1in and 140lbs?
What is the BMI for a 6ft 1in woman at 140lbs?
How can a 6ft 1in woman maintain a healthy weight?
Related Tools & Articles
💡 About this calculation: BMI = (140 × 703) ÷ (73 × 73) = 18.5 | Metric: 185.4 cm, 63.5 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: 2026-09-12