
Body Mass Index (BMI) is a widely used health metric that helps estimate body fat based on your weight and height. Use our free BMI Calculator Online this weight and height calculator is trusted by doctors, dietitians, and fitness professionals worldwide. It gives you a quick way to check if you’re in a healthy weight range or at risk of being underweight, overweight, or obese.
Calculate Your BMI Now
Measurement System:
- Imperial (lbs, ft/in)
- Metric (kg, cm)
Inputs:
- Weight
- Height
- Age
- Gender
BMI Calculator
Calculate your Body Mass Index
BMI Categories
- Underweight: Below 18.5
- Normal weight: 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 and above
Why is BMI Important?
Knowing your Body Mass Index (BMI) can help you:
Use as a baseline for your obesity risk assessment
Detect if you are underweight, overweight, or obese
Take early action to reduce obesity risk like diabetes, heart disease, or high blood pressure
Set realistic goals for fitness and weight management
BMI Categories (WHO BMI Chart)
According to the World Health Organization (WHO BMI chart):
BMI Value | Weight Status |
---|---|
Less than 18.5 | Underweight |
18.5 – 24.9 | Normal or Healthy |
25.0 – 29.9 | Overweight |
30.0 and above | Obese |
This BMI normal range chart helps you understand whether your BMI score interpretation places you in a safe health zone.

These ranges are based on guidelines by the World Health Organization (WHO) and may be adjusted slightly for different populations.
Limitations of BMI You Should Know
While the BMI calculator online is a powerful fitness and health calculator, it has some limitations:
- Doesn’t measure muscle vs fat (athletes may appear overweight)
- Ignores age, gender, bone density, and ethnicity
- Less accurate for children and highly active adults
👉 For a complete evaluation, always consult a healthcare professional.
Looking to Improve Your Health?
If you’re looking to maintain a healthy weight and track your fitness goals, our BMI Calculator Online is the perfect tool to guide you. By regularly checking your Body Mass Index (BMI), you can stay informed about your weight category and take proactive steps to achieve a healthy lifestyle. Whether you are looking to lose weight, gain muscle, or simply monitor your body composition, this easy-to-use BMI tool provides instant, accurate results.
Combine your BMI insights with a balanced diet, consistent exercise routine, and proper hydration to achieve sustainable results. For those looking to prevent health risks such as diabetes, heart disease, and obesity, monitoring your BMI score is an essential first step. Start using our online BMI calculator today and take control of your health and wellness journey.
Start Your Health and Fitness Journey with us , Explore our Calorie Calculator Tool and Water Intake Tool also to get advantage for your health
Final Thoughts – Take Control of Your Health
Your BMI score is more than just a number. It’s a starting point to understand your health better. Use this body fat measurement tool to check your healthy weight range and combine it with a balanced diet, regular exercise, and medical guidance for best results.
Frequently Asked Questions (FAQ)
Q1: What is the formula for BMI?
👉 BMI = weight (kg) ÷ height² (m²).
Q2: What is the ideal BMI for men and women?
👉 The ideal BMI for men and women generally falls between 18.5 – 24.9.
Q3: Can I calculate BMI at home?
👉 Yes! You can check your BMI at home using our free BMI calculator online.
Q4: Is BMI the same for adults and children?
👉 No. BMI for adults and children is calculated differently because children’s BMI depends on growth charts and percentiles.
Q5: How accurate is BMI for obesity risk assessment?
👉 BMI is a useful screening tool, but it should be combined with other tests (waist measurement, body fat percentage) for accurate obesity risk assessment.