📊 Calculate Your BMI & Body Fat %
Our free BMI Calculator helps you instantly calculate your Body Mass Index, check your healthy weight range, and estimate your body fat percentage. Just enter your weight, height, age, and gender to get detailed results in seconds.
ℹ️ About This Calculator
Body Mass Index (BMI) is a simple health measurement that uses your height and weight to estimate whether you are underweight, normal, overweight, or obese. However, traditional BMI doesn’t account for age, gender, or muscle mass. That’s why this calculator also includes an estimated body fat percentage for better accuracy.
BMI Formula: Weight (kg) ÷ [Height (m)]²
Body Fat % Formula: (1.20 × BMI) + (0.23 × Age) – (10.8 × Gender) – 5.4
WHO BMI Categories:
- Underweight: less than 18.5
- Normal: 18.5 – 24.9
- Overweight: 25 – 29.9
- Obese: 30 or more
👉 Remember, BMI is a screening tool and not a diagnostic test. Athletes and people with high muscle mass may show a higher BMI without having excess fat.
❓ Frequently Asked Questions
1. Why does this calculator ask for age and gender?
Age and gender affect body fat percentage, making this calculation more accurate than BMI alone.
2. Is this body fat percentage 100% accurate?
No, it’s an estimate. For precise results, professional tests like DEXA scans or calipers are needed.
3. What is a healthy BMI range?
A BMI between 18.5 and 24.9 is considered healthy for most adults.
4. Can BMI be misleading?
Yes, BMI doesn’t differentiate between muscle and fat. A muscular person may appear “overweight” even if they are healthy.
5. Should I rely only on BMI?
No, use BMI as a guideline. Combine it with other health factors like diet, physical activity, waist circumference, and body fat percentage.