BMI for 180 cm and 55 kg
A person 180 cm (5'11") tall weighing 55 kg (121 lbs) has a BMI of 17.0 — classified as Underweight. The healthy weight range for this height is 59.9–80.7 kg.
Your BMI
17.0
Category
Underweight
Under 18.518.5–24.925–29.930+
Healthy weight range: 59.9–80.7 kg
What does this BMI mean?
A BMI of 17.0 sits in the Underweight range under the standard WHO adult classification. This range is associated with nutritional gaps for some people. If unintentional, a check-up and dietary review are sensible.
For someone 180 cm tall, weights between 59.9 kg and 80.7 kg fall in the BMI 18.5–24.9 normal range. That's roughly 132–178 lbs.
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Last updated: 2026