BMI Calculator
Calculate your Body Mass Index (BMI) instantly with metric or imperial units. Get instant classification and healthy weight range recommendations.
What is BMI?
Body Mass Index (BMI) is a simple measure using your height and weight to screen for weight categories that may lead to health problems.
BMI is calculated by dividing your weight in kilograms by your height in meters squared (kg/m²). While BMI does not directly measure body fat, it provides a reasonable screening tool for most adults.
How to Use
Enter your height and weight below to calculate your BMI:
- Select metric (kg/cm) or imperial (lbs/ft-in) units
- Enter your height and weight
- View your BMI result with classification and healthy weight range
BMI Categories (WHO)
BMI Formula
The standard BMI formula is:
Frequently Asked Questions
Have another question? Let us know.
How accurate is BMI?
BMI is a useful screening tool but not perfect. It doesn’t account for muscle mass, bone density, age, or sex. Athletes or muscular individuals may have a high BMI with healthy body fat levels.
What is a normal BMI range?
According to WHO standards, a BMI between 18.5 and 24.9 is considered normal. Below 18.5 is underweight, 25-29.9 is overweight, and 30 or above falls into the obese category.
Can children use BMI?
BMI calculations for children differ from adults, requiring age- and sex-specific percentile charts. This calculator is intended for adults aged 18 and older.
How can I lower my BMI?
A combination of healthy diet and regular exercise can help reduce BMI gradually. Aim for a safe weight loss of 0.5-1 kg per week by combining cardio and strength training.
