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⚖️ BMI Calculator

Calculate your Body Mass Index and find your healthy weight range. Free BMI tool.

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⚖️ BMI Calculator

Body mass index & weight category

Your Measurements
ft
in
lbs
80400
Your BMI
Category
Healthy Weight Range
Under 18.5: Underweight · 18.5–24.9: Normal · 25–29.9: Overweight · 30+: Obese

About This Calculator

BMI (Body Mass Index) is a simple calculation using your height and weight to estimate whether you're in a healthy weight range. While BMI doesn't measure body fat directly, it's a widely used screening tool that gives a useful starting point for health discussions with your doctor.

How It Works

01
Enter Height
Input your height in feet and inches.
02
Enter Weight
Input your current weight in pounds.
03
Calculate Instantly
Your BMI and weight category appear immediately.
04
Compare to Ranges
See where you fall on the BMI scale.

Key Numbers

18.5–24.9
Healthy BMI Range
39%
US Adults Obese
30+
Obese Threshold
1835
Year BMI Invented
💡 Pro Tip

BMI has limitations — it doesn't account for muscle mass, bone density, or fat distribution. Athletes often have high BMIs due to muscle. Use BMI alongside waist circumference, body fat percentage, and medical advice for a complete health picture.

Frequently Asked Questions

Is BMI accurate for everyone?
BMI can be misleading for muscular athletes (who may be classified as overweight), older adults (who may carry more fat at a normal BMI), and certain ethnic groups who face health risks at lower BMI values.
What is a healthy BMI for women vs men?
The same BMI scale applies to both men and women: under 18.5 is underweight, 18.5–24.9 is normal, 25–29.9 is overweight, and 30+ is obese. However, women naturally carry more body fat than men at the same BMI.
What should I do if my BMI is high?
Consult your doctor first. They can assess whether your BMI is a health concern and recommend lifestyle changes. Small, consistent changes to diet and exercise typically produce the most sustainable results.
Can children use this BMI calculator?
This calculator is designed for adults (20+). Children's BMI is calculated differently, using age and sex-specific percentile charts. Consult a paediatrician for children's weight assessment.
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