What inputs does BMI need?
BMI requires your height and weight. Age, activity, and sex are not part of the BMI calculation.
Body & health
BMI calculator with a healthy-weight range.
Enter height and weight to calculate adult BMI, view a reference category, and estimate the corresponding healthy-weight range in seconds.
2 inputs browser local
02
Related results
Your BMI result
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Enter the details above to get a clear local estimate.
How it works
Made for one clear task.
BMI is a screening reference based on weight relative to height, not a diagnosis or a direct measure of body fat. This calculator asks only for the two inputs the standard adult equation needs, then connects to the full body-metrics suite when you want broader estimates.
- Uses the standard BMI equation: weight ÷ height²
- Shows a reference category and healthy-weight range
- Requires only height and weight
Formula references
Compare BMI guidance with the CDC adult BMI guidance. BMR uses the published Mifflin–St Jeor equation; for personalized weight planning, see the NIH Body Weight Planner.
Common questions
BMI calculator with a healthy-weight range. FAQs
Can BMI diagnose health conditions?
No. BMI is a population-level screening reference and does not measure body composition or diagnose a condition.