BMI Calculator
Calculate your Body Mass Index (BMI) and check your weight category
Easy Calculation
Simple and accurate BMI calculation
Multiple Units
Metric and Imperial support
Health Insights
Get personalized health recommendations
Frequently asked questions
What is a healthy BMI range?
For most adults a BMI between 18.5 and 24.9 is considered a healthy weight range. Ranges vary slightly for children, teenagers and some ethnic groups.
Is BMI accurate for athletes and muscular people?
Not reliably. BMI cannot tell muscle from fat, so very muscular people are often classified as overweight despite low body fat. Treat it as one data point rather than a diagnosis.
Does BMI apply to children?
No. Children and teenagers need age- and sex-specific percentile charts rather than the adult BMI formula used here.
How often should I check my BMI?
There is no fixed schedule. Most people check alongside a regular weigh-in, monthly or so, to track a trend rather than a single reading.