BMI of 17 — What does it mean?
Instant answer: A BMI of 17 is classified as underweight.
Below 18.5, micronutrient deficiencies, reduced bone density, and weakened immune response become more common.
Weight examples that give a BMI of 17
| Height | Weight (kg) | Weight (lbs) |
|---|---|---|
| 160 cm (5'3") | 43.5 | 96 |
| 165 cm (5'5") | 46.3 | 102 |
| 170 cm (5'7") | 49.1 | 108 |
| 175 cm (5'9") | 52.1 | 115 |
| 180 cm (5'11") | 55.1 | 121 |
| 185 cm (6'1") | 58.2 | 128 |
Practical next steps
- Prioritise protein at every meal (1.2–1.6 g per kg of body weight).
- Use calorie-dense additions like nuts, olive oil, and avocado.
- Strength-train at least twice a week to convert added calories into muscle.
- Speak to a clinician if weight loss was unintentional.
Frequently asked questions
What does a BMI of 17 mean?
A BMI of 17 falls into the underweight category as defined by the World Health Organization. Below 18.5, micronutrient deficiencies, reduced bone density, and weakened immune response become more common.
Is a BMI of 17 healthy?
This BMI is outside the WHO healthy range of 18.5–24.9 and falls into the underweight category.
What weight gives a BMI of 17 at 170 cm?
At 170 cm, a BMI of 17 corresponds to roughly 49.1 kg.