What is a healthy BMI range?

A healthy BMI is 18.5-24.9. This range is associated with the lowest risk of weight-related health conditions. Under 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese.

Is BMI accurate for everyone?

BMI is a screening tool, not a diagnostic measure. It doesn't distinguish muscle from fat, so athletes and muscular individuals may have high BMIs despite low body fat. It also doesn't account for age, sex, or bone density. Use it with other health markers.

What if my BMI is too high or too low?

If your BMI is outside the healthy range, consult a healthcare provider. They can assess other factors like body fat percentage, waist circumference, blood pressure, and metabolic health. Focus on gradual, sustainable lifestyle changes rather than rapid weight loss/gain.

Can I trust BMI for my health?

BMI is one of many health indicators. Combine it with body fat percentage (Navy method), waist-to-height ratio, blood pressure, cholesterol, and blood sugar for a complete picture. Overall fitness, strength, and metabolic health matter more than BMI alone.

BMI Calculator

Calculate your Body Mass Index (BMI) and determine weight category with healthy weight ranges for your height.

Inputs

Unit Systemⓘ

Weight (lbs)ⓘ

Height (feet)ⓘ

5'10" = 5 feet, 10 inches

Height (inches)ⓘ

Enter 0-11

Enter values to see results

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What is this?

Body Mass Index (BMI) is a screening tool that uses your height and weight to estimate body fat and assess health risks. BMI = (weight × 703) / height² for Imperial or weight(kg) / height(m)² for Metric. It's used worldwide by doctors and health organizations to quickly categorize weight status.

How to use

Select your preferred unit system (Imperial or Metric). Enter your weight and height using the appropriate fields for your chosen system. The calculator instantly shows your BMI score, weight category, and healthy weight ranges for your specific height.

Tips

BMI is a screening tool, not a diagnostic tool - it doesn't measure body fat directly
Healthy BMI range is 18.5-24.9 for most adults (18+ years old)
BMI doesn't distinguish muscle from fat - bodybuilders often have "overweight" BMI despite low body fat
Athletes and very muscular individuals: Use body fat percentage calculator instead
BMI isn't accurate for pregnant women, children, or elderly individuals
Combine BMI with waist circumference and body fat % for complete picture
A "normal" BMI doesn't guarantee health - diet quality and exercise matter more than weight alone
For weight loss: Aim to lose 0.5-1% body weight per week (about 1-2 lbs for most people)
International users: Metric system is more common globally, Imperial mainly used in US/UK

Disclaimer: This calculator provides estimates for informational purposes only and does not constitute medical advice. Results are based on general formulas and may not account for individual health conditions. Consult a qualified healthcare professional for personalized guidance. See our full disclaimer for details.

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