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BMI: 128cm, 31kg
BMI for 128cm tall and 31kg: 18.9 (Normal). Free BMI calculator with health categories.
18.9 (Normal)
BMI = 31 / (128/100)^2 = 18.9. 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 |
|---|---|
| 128 / 26 | 15.9 (Underweight) |
| 128 / 29 | 17.7 (Underweight) |
| 128 / 30 | 18.3 (Underweight) |
| 128 / 32 | 19.5 (Normal) |
| 128 / 33 | 20.1 (Normal) |
| 128 / 36 | 22.0 (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.