BMI Calculator
A simple, accurate way to check if you're at a healthy weight. Enter your height and weight below.
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How It Works
Body Mass Index (BMI) is a screening method used by healthcare professionals to determine if you are at a healthy weight for your height.
Underweight
< 18.5
Normal
18.5 - 24.9
Overweight
25 - 29.9
Obese
30+
What is the formula?
- Metric: Weight (kg) / Height (m)²
- Imperial: 703 × Weight (lbs) / Height (in)²
Actionable Insights
Limitations of BMI
While BMI is a useful fast screening tool, it is not a diagnosis of health. It does not measure body fat directly.
- Muscle Mass: Athletes with high muscle mass may be categorized as "Overweight" despite having low body fat.
- Age: Older adults may have more body fat than younger adults with the same BMI.
- Distribution: It does not account for where fat is stored (belly fat is more dangerous than subcutaneous fat).
Frequently Asked Questions
No, this calculator is for adults (20+). For children and teens, BMI must be interpreted relative to age and sex percentiles (BMI-for-age).