CalorieHawk

BMI Calculator

Estimate body mass index and see the standard BMI categories.

Metric + imperial
WHO BMI categories
Instant readout
Calculate your BMI
Choose units and enter height and weight.
cm
kg
BMI
22.9
Category
Normal
BMI Prime
0.91
BMI scale10 to 40+
BMI 22.9
1018.5253040+
Underweight
10–18.5
Normal
18.5–25
Overweight
25–30
Obese
30+
Healthy weight
56.7 - 76.3kg
Healthy weight
124.9 - 168.1lb
Ponderal Index
13.06kg/m3

What BMI tells you

BMI compares weight to height to estimate total body mass. It is a fast screening tool, but it does not distinguish fat from muscle.

Assumptions

Uses BMI (kg/m2) and standard adult categories. It is not intended for children, pregnancy, or highly muscular builds.

Use it with context

Pair BMI with waist measurements, body-fat estimates, or performance data to understand your full health picture.

FAQ

What is a healthy BMI?

For most adults, a healthy BMI range is 18.5 to 24.9. This BMI calculator shows where your result lands, but it is still a screening tool rather than a diagnosis.

Is BMI accurate for athletes or muscular people?

BMI can overestimate body fat in very muscular people because it does not separate fat from lean mass. Pair it with a body fat calculator or waist measurement for better context.

Can I use this BMI calculator with pounds and feet?

Yes. The calculator supports both imperial and metric inputs, so you can use pounds and feet or kilograms and centimeters and get the same BMI result.