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BMI: 171cm, 55kg
BMI for 171cm tall and 55kg: 18.8 (Normal). Free BMI calculator with health categories.
18.8 (Normal)
BMI = 55 / (171/100)^2 = 18.8. Category: Normal.
How This Was Calculated
Metric: BMI = weight(kg) / height(m)²
Imperial: BMI = 703 × weight(lbs) / height(in)²
Categories: Underweight <18.5 | Normal 18.5-24.9 | Overweight 25-29.9 | Obese ≥30.
Quick Reference Table
| Input | Result |
|---|---|
| 171 / 50 | 17.1 (Underweight) |
| 171 / 53 | 18.1 (Underweight) |
| 171 / 54 | 18.5 (Underweight) |
| 171 / 56 | 19.2 (Normal) |
| 171 / 57 | 19.5 (Normal) |
| 171 / 60 | 20.5 (Normal) |
Frequently Asked Questions
What is a healthy BMI?
A BMI between 18.5 and 24.9 is considered normal.
Does BMI account for muscle mass?
No, BMI is a general screening tool and does not distinguish muscle from fat.
Should I use metric or imperial?
Both give the same result. Use whichever you are comfortable with.