BMI Calculator
Calculate your Body Mass Index instantly in metric or imperial units, see which World Health Organization weight category you fall into, and find the healthy weight range for your height.
Your BMI
22.9
WHO Category
Normal weight
Healthy range minimum
56.7 kg
Healthy range maximum
76.3 kg
How to Use the BMI Calculator
- Choose metric (cm / kg) or imperial (ft-in / lb) units.
- Enter your height and body weight.
- Read your BMI value, WHO weight classification and the healthy weight range for your height.
Formulas Used
Metric: BMI = weight (kg) / height (m)²
Imperial: BMI = 703 × weight (lb) / height (in)²
Healthy weight range = 18.5 × height (m)² to 24.9 × height (m)²
Frequently Asked Questions
What is a healthy BMI range for adults?
The World Health Organization classifies a BMI of 18.5 to 24.9 as normal weight, below 18.5 as underweight, 25.0 to 29.9 as overweight and 30.0 or above as obese.
Is BMI accurate for athletes and muscular people?
No. BMI only compares weight to height and cannot separate muscle from fat, so muscular athletes are often classed as overweight. Pair BMI with a body fat or lean mass estimate for a fuller picture.
Does BMI work for children and teenagers?
Children and teens need age- and sex-specific BMI-for-age percentile charts rather than fixed adult cut-offs, so ask a paediatrician to interpret a child's result.
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