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BMI: 40cm, 3kg
BMI for 40cm tall and 3kg: 18.7 (Normal). Free BMI calculator with health categories.
18.7 (Normal)
BMI = 3 / (40/100)^2 = 18.7. 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 |
|---|---|
| 40 / 1 | 6.2 (Underweight) |
| 40 / 2 | 12.5 (Underweight) |
| 40 / 4 | 25.0 (Normal) |
| 40 / 5 | 31.2 (Obese) |
| 40 / 8 | 50.0 (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.