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BMI: 8cm, 21kg
BMI for 8cm tall and 21kg: 3,281.3 (Obese). Free BMI calculator with health categories.
3,281.3 (Obese)
BMI = 21 / (8/100)^2 = 3,281.3. 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 |
|---|---|
| 8 / 16 | 2,500.0 (Obese) |
| 8 / 19 | 2,968.8 (Obese) |
| 8 / 20 | 3,125.0 (Obese) |
| 8 / 22 | 3,437.5 (Obese) |
| 8 / 23 | 3,593.8 (Obese) |
| 8 / 26 | 4,062.5 (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.