Your calculated BMI is: 17.4

BMI: 17.4 - how good is it?

Your BMI is: Too low

Weight: 45 kg (99 lbs)
Height: 161 cm (5 feet and 3 inches)


A BMI value of 17.4 is classified by the World Health Organization (WHO) as Underweight

The result of the calculation shows that you are underweight compared to your height. It is necessary that you live a healthier life with regards to increased nutritional intake. Try to eat more often and eat a more nutritious diet. A good composition of the daily diet is necessary to reduce the risk of developing various diseases. Living with underweight for more extended periods will be detrimental to your health.

Should your BMI show 16 or below, you may suffer from severe underweight. This means that you are at risk of developing Anorexia or Bulimia. In particular, for girls in their lower teens, that risk is more critical. Younger persons run a significantly increased risk of developing an eating disorder at low BMI. The sooner discovered, the sooner a treatment starts, the better the chance of curing or alleviating the course of the disease.

For some individuals, it may be challenging to increase weight. It is recommended that you communicate with your healthcare provider for guidance on, among other things, dietary advice personalized for you.

Symptoms and complications of eating disorders can include:

  • Osteoporosis
  • Concentration difficulties
  • Low blood pressure
  • Low body temperature
  • Low heart rate
  • Muscle weakness
  • Insomnia (sleeplessness)
  • Reduced metabolism
  • Dangerous underweight

You can read more about your underweight classification here.

To improve your rating and classification to normal, you must increase your BMI value by 1.1 to a BMI of 18.5. The change corresponds to a weight gain of 3 kg (7 lbs) for you with a height of 161 cm (5 feet and 3 inches).

Calculate age-adjusted BMI

Age: years

By entering your age and gender, you can get a more accurate classification and calculate your adjusted BMI. This is known as Age-Adjusted BMI (AA-BMI). AA-BMI is based on a combination of both science and empirical data.

The older an individual, the less risk a small overweight poses to the overall health. What is typically considered overweight for a young person can be regarded as a healthy weight for an older person. You can read more about BMI in elderly here.

Virtual BMI calculator

BMI 45 kg and 161 cm on the BMI calculator

Calculate your daily calorie requirement

Age: years

An individual´s need for nutrition and calories depends on activity level as well as on body mass. There is a difference between men and women when it comes to burning calories. This is mostly because of body mass. Furthermore, a healthy calorie intake varies and is also depending on age.

Enter the age and gender in the Calorie Calculator above to determine how many calories you need per day at various activity levels.

Read more about calorie consumption and calorie requirements here.

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