What is BMI and how is it calculated?

BMI (Body Mass Index) is calculated by dividing your weight in kilograms by your height in meters squared (kg/m²). It's a simple measure to assess if your weight is healthy for your height.

What is a healthy BMI range?

A healthy BMI is between 18.5 and 24.9. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is considered obese.

BMI is a useful screening tool but has limitations. It doesn't account for muscle mass, bone density, age, or gender. Athletes may have high BMI but low body fat. Consult a healthcare provider for personalized assessment.

How do I calculate BMI with pounds and feet?

For imperial units: BMI = (weight in pounds × 703) ÷ (height in inches)². Our calculator handles this automatically when you select imperial units.

BMI Calculator

Calculate your Body Mass Index (BMI) instantly with our free BMI calculator. Enter your height and weight to determine if you are underweight, normal, overweight, or obese. Supports both metric (kg, cm) and imperial (lbs, ft/in) measurements.