BMI for 171 cm and 55 kg
A person 171 cm (5'7") tall weighing 55 kg (121 lbs) has a BMI of 18.8 — classified as Normal. The healthy weight range for this height is 54.1–72.8 kg.
Your BMI
18.8
Category
Normal
Under 18.518.5–24.925–29.930+
Healthy weight range: 54.1–72.8 kg
What does this BMI mean?
A BMI of 18.8 sits in the Normal range under the standard WHO adult classification. This range is generally associated with the lowest health risk for most adults.
For someone 171 cm tall, weights between 54.1 kg and 72.8 kg fall in the BMI 18.5–24.9 normal range. That's roughly 119–161 lbs.
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Last updated: 2026