Calculate your Body Mass Index and find your ideal weight range
Body Mass Index (BMI) is a measure of body fat based on height and weight. It's a useful screening tool to identify potential weight problems in adults.
Note: BMI is not a diagnostic tool. It doesn't account for factors like muscle mass, bone density, or body composition. Consult with a healthcare provider for personalized health advice.
Calculate your Body Mass Index using standard WHO formulas for both metric and imperial units.
Get personalized ideal weight recommendations based on your height and healthy BMI range.
Switch between metric (kg/cm) and imperial (lbs/ft/in) units for flexible calculations.
Automatic classification into underweight, normal, overweight, or obese categories.
See your BMI position on an intuitive visual scale with color-coded categories.
Get immediate BMI calculations and health insights as you enter your measurements.
Body Mass Index (BMI) is a measure of body fat based on your height and weight. It is calculated by dividing your weight in kilograms by your height in meters squared (kg/m²). For imperial units, the formula is weight in pounds divided by height in inches squared, multiplied by 703.
According to the World Health Organization (WHO), a healthy BMI for adults ranges from 18.5 to 24.9. A BMI below 18.5 is considered underweight, 25-29.9 is overweight, and 30 or above is classified as obese. However, BMI is just one indicator of health.
BMI is a useful screening tool but has limitations. It doesn't account for muscle mass, bone density, overall body composition, or age and sex differences. Athletes with high muscle mass may have elevated BMI despite low body fat. Always consult healthcare professionals for personalized assessment.
This BMI calculator is designed for adults aged 20 and over. Children and teenagers require age and gender-specific BMI percentile charts because their body composition changes as they grow. Consult a pediatrician for accurate BMI assessment in children.
Your ideal weight range is calculated based on maintaining a healthy BMI (18.5-24.9) for your height. Our calculator shows this range automatically. For example, if you're 170cm tall, your ideal weight range would be approximately 53-72kg to maintain a healthy BMI.
It's recommended to check your BMI periodically, such as every few months, especially if you're working on weight management goals. However, BMI shouldn't be your only health metric. Focus on overall health indicators including energy levels, fitness, and body composition.
If your BMI is outside the healthy range, consult with a healthcare provider or registered dietitian. They can assess your overall health, consider other factors beyond BMI, and help create a personalized plan for achieving a healthy weight through balanced nutrition and physical activity.
The BMI calculation formula is the same for both men and women. However, women typically have more body fat than men at the same BMI level. Despite this, the standard BMI categories apply to both sexes. Some health professionals consider additional measurements alongside BMI for more accurate assessment.