Does BMI measure body fat directly?

No. BMI is a height-to-weight screening ratio and does not distinguish between muscle mass and fat mass. Pair it with our Body Fat Calculator for waist-based composition estimates.

Fitness & Health100% Client-Side · Instant Math

BMI Calculator

Check Body Mass Index (BMI), WHO classification, and healthy weight range.

Units

Height (ft)

Height (in)

Weight

lbs

Result Summary

Your BMI

22.7

Normal weight (18.5 – 24.9)

Healthy Weight Range

125.3 – 168.6 lbs

BMI Prime (vs. 25): 0.91

Underweight (< 18.5)Normal weight (18.5 – 24.9)Overweight (25.0 – 29.9)Obesity (≥ 30.0)

Health & Wellness Reference Notice

Calculations use established statistical formulas for general informational wellness guidance only and do not replace clinical diagnosis or personalized medical care.

How to Use This Calculator

Calculate Body Mass Index using Metric (cm, kg) or US/Imperial (ft, in, lbs) units, view WHO weight categories, BMI Prime, and recommended healthy weight range for your height.

1Choose Metric (kg / cm) or US Imperial (lbs / ft + in) units.
2Enter your height and current body weight.
3View your BMI score, WHO category gauge, BMI Prime ratio, and healthy weight target range.

Standard Formula & Methodology

Metric: BMI = kg / m² | Imperial: BMI = 703 × lbs / in²