Calculate adult body mass index, category, and healthy-BMI weight reference range.
BMI is your weight in kilograms divided by your height in metres squared. 18.5–24.9 is the healthy adult range, but it can't tell muscle from fat.
BMI equals weight in kilograms divided by height in metres squared. Adult categories apply from age 20.
Keep your inputs consistent and compare weekly trends. Make small changes only after enough data accumulates.
Calculator results are estimates. Pregnancy, eating disorders, medical conditions, injuries, or concerning symptoms require qualified professional guidance.
For adults, 18.5–24.9 is considered the healthy range, 25–29.9 overweight, and 30+ obese. It's a screen, not a diagnosis.
Not really — muscular people can read 'overweight' despite low body fat. Pair BMI with a body-fat or waist measurement.
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