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BMI: 129cm, 9kg
BMI for 129cm tall and 9kg: 5.4 (Underweight). Free BMI calculator with health categories.
5.4 (Underweight)
BMI = 9 / (129/100)^2 = 5.4. Category: Underweight.
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 |
|---|---|
| 129 / 4 | 2.4 (Underweight) |
| 129 / 7 | 4.2 (Underweight) |
| 129 / 8 | 4.8 (Underweight) |
| 129 / 10 | 6.0 (Underweight) |
| 129 / 11 | 6.6 (Underweight) |
| 129 / 14 | 8.4 (Underweight) |
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.