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BMI: 31cm, 13kg
BMI for 31cm tall and 13kg: 135.3 (Obese). Free BMI calculator with health categories.
135.3 (Obese)
BMI = 13 / (31/100)^2 = 135.3. Category: Obese.
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 |
|---|---|
| 31 / 8 | 83.2 (Obese) |
| 31 / 11 | 114.5 (Obese) |
| 31 / 12 | 124.9 (Obese) |
| 31 / 14 | 145.7 (Obese) |
| 31 / 15 | 156.1 (Obese) |
| 31 / 18 | 187.3 (Obese) |
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.