BMI Calculator – Calculate Your Body Mass Index
BMI Chart – Body Mass Index Categories
| BMI Range | Category | Health Risk |
|---|---|---|
| Below 18.5 | Underweight | Increased risk of malnutrition |
| 18.5 – 24.9 | Normal Weight | Low risk |
| 25.0 – 29.9 | Overweight | Increased risk |
| 30.0 and above | Obese | High risk |
How to Use This BMI Calculator
Our BMI calculator is simple and accurate. Just follow these steps:
- Choose your preferred units (Metric or Imperial)
- Enter your weight in kg or pounds
- Enter your height in cm or feet/inches
- Click “Calculate BMI” to get your result
The body mass index calculator will instantly show your BMI value and category, helping you understand your current weight status.
What is BMI (Body Mass Index)?
BMI is a simple calculation that uses your height and weight to determine if you’re in a healthy weight range. The BMI formula is:
BMI = weight (kg) / height (m)²
For imperial units: BMI = (weight in pounds / height in inches²) × 703
BMI Categories Explained
Underweight (BMI below 18.5)
If your BMI calculation shows you’re underweight, you may need to gain weight for optimal health. Consult with a healthcare provider for personalized advice.
Normal Weight (BMI 18.5-24.9)
This is the ideal BMI range for most adults. Maintain your current weight through balanced diet and regular exercise.
Overweight (BMI 25.0-29.9)
Being overweight increases your risk of health problems. Consider lifestyle changes to reach a healthier weight.
Obese (BMI 30.0+)
Obesity significantly increases health risks. Professional medical guidance is recommended for safe weight loss.
💡 Health Tips Based on Your BMI
- Eat a balanced diet: Include fruits, vegetables, lean proteins, and whole grains
- Stay active: Aim for at least 150 minutes of moderate exercise per week
- Stay hydrated: Drink plenty of water throughout the day
- Get enough sleep: 7-9 hours of quality sleep supports healthy weight
- Consult professionals: Work with healthcare providers for personalized advice
BMI Calculator Limitations
While our BMI calculator is a useful screening tool, it has some limitations:
- It doesn’t distinguish between muscle and fat mass
- It may not be accurate for athletes with high muscle mass
- Age and gender aren’t factored into the basic calculation
- It’s not suitable for pregnant women or children under 18
When to Consult a Healthcare Provider
Consider professional medical advice if:
- Your BMI falls outside the normal range
- You have concerns about your weight or health
- You’re planning significant dietary or exercise changes
- You have underlying health conditions
Frequently Asked Questions
Is BMI accurate for everyone?
BMI is a general screening tool that works well for most adults but may not be accurate for athletes, elderly individuals, or those with unusual body compositions.
How often should I check my BMI?
Checking your BMI monthly or quarterly can help you track changes in your weight status over time.
Can I use this BMI calculator for children?
This calculator is designed for adults. Children’s BMI requires age and gender-specific percentile charts.