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.