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BMI Calculator

Calculate your BMI instantly. Enter your height and weight to find your body mass index, BMI category, and healthy weight range.

Unit System

Feet1–9

Inches0–11

Weight (lbs)50–1000

✨ Your Result

BMI

UnderweightNormalOverweightObese

CategoryNormal

Height5'10"

Weight170 lbs

Frequently Asked Questions

Common questions about bmi.

A BMI between 18.5 and 24.9 is considered normal weight. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese.

BMI equals your weight in kilograms divided by your height in meters squared: BMI = kg / m².

BMI is a useful screening tool but does not directly measure body fat. Athletes with high muscle mass may have a high BMI despite low body fat.

How to Calculate

To use this BMI calculator, enter your height (in feet and inches or metric) and your weight (in pounds or kilograms). The calculator instantly computes your Body Mass Index using the standard formula: **BMI = weight (kg) / height (m)²**. Your result is displayed with a visual gauge showing where you fall within the BMI categories established by the WHO and CDC. The tool also shows your healthy weight range based on your height.

Formula & Method

BMI = weight (kg) / height (m)²

Or in imperial units:
BMI = (weight in pounds × 703) / (height in inches)²

Sources & References

https://www.cdc.gov/healthyweight/assessing/bmi/adult_bmi/index.html
https://www.who.int/data/gho/data/themes/topics/topic-details/GHO/body-mass-index
https://www.nhlbi.nih.gov/health/educational/lose_wt/BMI/bmicalc.htm

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