BMI CACULATOR

BMI Calculator (Full Version)

Select mode: Adult (20 yrs +) Child/Teen (2-19 yrs)

Age:

Weight: kilograms (kg) pounds (lbs) stones & pounds

Height: metres (m) centimetres (cm) feet & inches

BMI range (kg/m²)	Category (Adults)
< 18.5	Underweight
18.5 – 24.9	Normal weight
25.0 – 29.9	Overweight (Pre-obese)
30.0 – 34.9	Obesity, Class I
35.0 – 39.9	Obesity, Class II
≥ 40.0	Obesity, Class III

For children & teens (2-19 yrs) the BMI is interpreted using percentiles for age & sex. Centers for Disease Control and Prevention (CDC) categories:

• Less than 5th percentile → Underweight
• 5th to less than 85th percentile → Healthy weight
• 85th to less than 95th percentile → Overweight
• 95th percentile or greater → Obesity

(Source: CDC) :contentReference[oaicite:1]{index=1}

**Note:** This calculator estimates BMI number only; a true percentile requires age-&-sex growth charts.