⚖️ BMI Calculator
Calculate your Body Mass Index instantly. Get weight category, healthy range, BMR & daily calorie needs. Free & private.
✨ 100% Free & Private📊 BMI Category Chart
📖 What is BMI?
BMI (Body Mass Index) is a measure of body fat based on height and weight. It is widely used to categorize individuals into weight categories that may indicate health risks.
BMI Formula
BMI Categories
- Underweight: BMI < 18.5
- Normal: 18.5 – 24.9
- Overweight: 25.0 – 29.9
- Obese Class I: 30.0 – 34.9
- Obese Class II: 35.0 – 39.9
- Obese Class III: ≥ 40.0
Limitations of BMI
BMI is a screening tool, not a diagnostic tool. It does not account for muscle mass, bone density, overall body composition, or distribution of fat. Athletes may have high BMI due to muscle, not fat. Always consult a healthcare professional for a complete assessment.
🔒 Privacy: All calculations are done locally in your browser. No data is sent to any server.
❓ Frequently Asked Questions
BMI (Body Mass Index) is a measure of body fat based on height and weight.
BMI = Weight (kg) / Height (m)². For imperial: BMI = (Weight in lbs / Height in inches²) × 703.
BMI is a good screening tool but not a diagnostic tool. It may not be accurate for athletes, pregnant women, or elderly.
BMI categories are the same for both sexes, but body fat distribution differs. Women generally have more body fat.
Yes, but BMI percentiles are used for children and teens based on age and gender.
A healthy BMI is between 18.5 and 24.9.
Yes, athletes may have high BMI due to muscle mass, not fat.
Yes, it is completely free to use.
Body composition changes with age, but BMI categories remain the same for adults.
Eat a balanced diet, exercise regularly, and maintain a healthy lifestyle.
BMR (Basal Metabolic Rate) is the number of calories your body needs at rest.
Ideal weight is the weight range associated with the lowest health risk for your height.
Body fat percentage is the proportion of fat to total body weight.
Our tool provides an estimate based on BMI, age, and gender.
Yes, click the Print button to print your results.
Yes, use the share buttons to share on social media or via email.
No, all calculations are done locally. No data is stored or sent anywhere.
No, BMI is not accurate during pregnancy. Consult your healthcare provider.
BMI may not be accurate for elderly due to loss of muscle mass.
A BMI between 18.5 and 24.9 is considered healthy for women.
A BMI between 18.5 and 24.9 is considered healthy for men.
Yes, use the imperial system option for pounds and inches.
BMI = (Weight in lbs / Height in inches²) × 703.
Yes, it works perfectly on all devices.
It's recommended to check your BMI periodically, especially if you're working on weight management.
