If your BMI is: under 18.5kg/m2 – you are considered underweight and possibly malnourished. 18.5 to 24.9kg/m2 – you are within a healthy weight range for young and middle-aged adults. 25.0 to 29.9kg/m2 – you are considered overweight.
If your BMI is less than 18.5, it falls within the underweight range. If your BMI is 18.5 to 24.9, it falls within the Healthy Weight range. If your BMI is 25.0 to 29.9, it falls within the overweight range.
As currently defined, a BMI between 18.5 and 24.9 is a healthy weight, between 25 and 29.5 is overweight, between 30 and 34.9 is obese, between 35 and 39.5 is class 2 obesity, and anything over 40 is “severe” or class 3 obesity, which used to be called morbid obesity.
Women with a BMI of less than 18.5 are considered underweight. The average woman's height is 5 feet, 4 inches. If you weigh 107 pounds or less at this height, you are considered underweight with a BMI of 18.4. A healthy weight range for that woman would be 108 to 145 pounds.
The World Health Organisation (WHO) defines a healthy adult BMI as being between 18.5 and 25. A BMI less than 18.5 indicates underweight (possibly caused by disease, malnutrition or eating disorders such as anorexia nervosa) and a BMI over 25 as overweight (possibly caused by poor diet choices or lack of exercise).
BMI ranges
under 18.5 – This is described as underweight. between 18.5 and 24.9 – This is described as the 'healthy range'. between 25 and 29.9 – This is described as overweight. between 30 and 39.9 – This is described as obesity.
How do I know if I'm underweight? Your body mass index, or BMI, is the relationship between your weight and your height. A BMI of 20-25 is ideal; 25-30 is overweight and over 30 is obese. If your BMI is under 18.5, you're considered underweight.
Earlier research has found that the most desired BMIs are approximately 18-20, considerably below the average or typical values of young women in well-fed populations.
If your BMI is: under 18.5kg/m2 – you are considered underweight and possibly malnourished. 18.5 to 24.9kg/m2 – you are within a healthy weight range for young and middle-aged adults. 25.0 to 29.9kg/m2 – you are considered overweight.
These studies have found that a low waist to hip ratio (WHR) of approximately 0.7 [9] and a low Body Mass Index (BMI; weight scaled for height) of approximately 18–19 kg/m2 [10] are perceived as most attractive in female bodies, while a low waist to chest ratio (WCR) of approximately 0.7, and relatively high BMI ( ...
If your BMI is less than 18.5, it falls within the underweight range. If your BMI is 18.5 to <25, it falls within the healthy weight range. If your BMI is 25.0 to <30, it falls within the overweight range. If your BMI is 30.0 or higher, it falls within the obesity range.
A BMI of 22 is considered normal. With a BMI of 22, no weight loss procedure is necessary or recommended. Useful information: If you have a BMI of 29 or greater than 29 a bariatric surgery procedure will be needed.
A BMI of 23 is considered normal.
The medical term for 'skinny fat' is technically MONW or “metabolically obese, normal weight” and “Sarcopenic obesity”. Skinny fat people are often a normal weight (or underweight!) but because of their sedentariness, lack of muscle, or poor diet, they have a high percentage of body fat.
The phrase 'skinny fat' or metabolically obese normal weight (MONW) is used to describe someone who appears to be lean, but actually has a high body fat percentage. If they were to calculate their body mass index (BMI) or even weigh themselves, they may appear to be healthy, but this can be deceiving.
BMI <17.0: moderate and severe thinness. BMI <18.5: underweight. BMI 18.5–24.9: normal weight. BMI ≥25.0: overweight.
Here's what your number means: Less than 18.5 = underweight. 18.5 to 24.9 = normal weight. 25 to 29.9 = overweight.
A weight under 100–110 pounds (50kg)
This beauty ideal became de rigueur in the industry; the average runway model has a body mass index (BMI) of 16, which the World Health Organization classifies as severely thin.
below 18.5 – you're in the underweight range. between 18.5 and 24.9 – you're in the healthy weight range. between 25 and 29.9 – you're in the overweight range. 30 or over – you're in the obese range.
Based on these figures a mean BMI of 12 as the lower limit for human survival emerges - a value first proposed by James et al (1988).
Infrequent Periods
The greater your BMI (particularly in the obese range over 35), the more likely you are to miss your period. It is even possible to stop bleeding altogether, a condition known as secondary amenorrhea.
The American Dietetic Association (ADA) defines the ideal body mass index (BMI) as between 20 and 25. Thus, anyone below that range would be considered underweight and those with a BMI from 18.5 to 17.5 extremely underweight.
Being small, or even underweight according to the numbers, doesn't mean you need to gain weight. A healthy weight isn't necessarily “seen” and not a sign that something is wrong or that a person has an eating disorder.