BMI for 170 cm & 45 kg

Pre-calculated Body Mass Index result for a height of 170 cm and a weight of 45 kg.

Your BMI

15.6

Severe Thinness

1618.525303540+

What does this mean?

At 170 cm and 45 kg, your Body Mass Index is 15.6, which falls into the Severe Thinness category.

A BMI below 16 is classified as Severe Thinness. This may indicate significant undernutrition and carries elevated health risks including weakened immunity and muscle loss. Consulting a healthcare professional is strongly recommended.

BMI is calculated as weight (kg) / height² (m). While it is a widely used screening tool, it does not differentiate between muscle and fat mass. For a more complete picture, consider measuring your body fat percentage.

Explore nearby BMI values

Same height (170 cm), different weight

Weight	BMI	Category
40 kg	13.8	Severe Thinness
50 kg	17.3	Mild Thinness
55 kg	19.0	Normal Weight
60 kg	20.8	Normal Weight

Same weight (45 kg), different height

Height	BMI	Category
155 cm	18.7	Normal Weight
160 cm	17.6	Mild Thinness
165 cm	16.5	Moderate Thinness
175 cm	14.7	Severe Thinness
180 cm	13.9	Severe Thinness
185 cm	13.1	Severe Thinness

Want to calculate with your exact measurements?

Our full calculator supports any height and weight, metric or imperial.

Try the Full BMI Calculator

Disclaimer: This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider.