About this BMI Calculator
BMI is a quick health screening number used by doctors worldwide. Enter your height and weight in metric (kg, cm) or US units (pounds, feet and inches) and see your BMI, your category and the healthy weight range for your height.
How to use it
- Choose metric or US units.
- Enter your height and weight.
- See your BMI and category instantly.
Read next: BMI Chart Explained: What Your Number Actually Means (And When to Ignore It)
Frequently asked questions
What is a healthy BMI?
For most adults 18.5 to 24.9 is the healthy range. Under 18.5 is underweight, 25-29.9 overweight and 30+ obese.
Is BMI accurate for athletes?
BMI can overestimate body fat in very muscular people. Treat it as a first screening, not a diagnosis.
What formula does it use?
Metric: weight (kg) / height (m) squared. US: 703 x weight (lb) / height (in) squared.