About This Calculator
Use our free BMI calculator to instantly calculate your Body Mass Index using US measurements — pounds, feet and inches. Find out if your weight is in the healthy range for your height and get your weight category result immediately.
All calculations are performed instantly in your browser — no sign-up, no ads blocking your results, completely free to use.
Frequently Asked Questions
What is a healthy BMI for adults?+
A healthy BMI for adults is between 18.5 and 24.9. Below 18.5 is underweight, 25–29.9 is overweight, and 30 or above is considered obese according to CDC guidelines.
How is BMI calculated in the US?+
In the US, BMI = (weight in pounds × 703) ÷ (height in inches²). For example, a person who is 5'10" and weighs 170 lbs has a BMI of 24.4, which is in the normal range.
Is BMI accurate for everyone?+
BMI is a useful screening tool but has limitations. It doesn't account for muscle mass, age, or body composition. Athletes may have high BMI due to muscle, not fat.
What BMI is considered obese?+
A BMI of 30 or higher is classified as obese by the CDC and WHO. A BMI of 40+ is considered severely obese (Class III obesity).
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