BMI Calculator
BMI calculator for adults: enter height and weight in metric or imperial units to get your body mass index and weight category, with the formula shown.
Formula
BMI = weight(kg) / height(m)²
Use it from the API
curl "https://moltcalc.com/api/calc/bmi?units=metric&weight=70&height=175"
See the API docs for every endpoint and the input schema.
FAQ
How is BMI calculated?+
BMI is your weight in kilograms divided by your height in meters squared. If you enter imperial units, the calculator converts pounds and inches to metric first, so the result is the same either way.
What is a healthy BMI?+
A BMI between 18.5 and 24.9 is considered a normal, healthy range for most adults. BMI is a general screening tool and does not account for muscle mass or body composition.
Is a BMI of 25 overweight?+
By the standard categories, yes, 25.0 is the lower edge of the overweight range (25 to 29.9), while 30 and above counts as obese. A muscular person can land in the overweight range while carrying little body fat, which is a known limitation of BMI.