BMI Calculator: Check Your Body Mass Index
Use our free Body Mass Index (BMI) calculator to check if your weight is in the healthy range. BMI is a measurement that uses your height and weight to determine if you’re at a healthy weight. It’s a simple screening tool that can help identify potential health issues related to weight.
Calculate Your BMI
Your BMI Result
Understanding Your BMI Results
BMI Categories
| BMI Range | Weight Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Healthy Weight |
| 25.0 – 29.9 | Overweight |
| 30.0 and Above | Obesity |
What Your BMI Means
Body Mass Index (BMI) is a numerical value calculated from your weight and height. It provides a simple way to categorize whether a person has a healthy body weight for their height.
Underweight (BMI below 18.5)
Being underweight might indicate malnutrition or other health problems. If you’re underweight, consider consulting with a healthcare professional to ensure you’re getting proper nutrition.
Healthy Weight (BMI 18.5 to 24.9)
A BMI within this range suggests that your weight is appropriate for your height. Maintaining a healthy weight reduces your risk of developing various health issues.
Overweight (BMI 25.0 to 29.9)
Having a BMI in this range indicates that you may be at increased risk for health problems such as heart disease, high blood pressure, and type 2 diabetes.
Obesity (BMI 30.0 and above)
Obesity is associated with a higher risk of serious health conditions including cardiovascular disease, stroke, type 2 diabetes, and certain types of cancer.
Limitations of BMI
While BMI is a useful screening tool, it does have several limitations you should be aware of:
- Muscle mass: BMI doesn’t distinguish between muscle and fat. Athletes and people with high muscle mass may have a high BMI but low body fat.
- Body composition: BMI doesn’t account for differences in bone density, muscle mass, or overall body composition.
- Age and gender: BMI doesn’t consider age or gender differences in body fat distribution.
- Ethnic variations: Different ethnic groups may have different body compositions and health risks at the same BMI level.
BMI should be one of several tools used to assess health risk, not the only one.
Tips for Maintaining a Healthy Weight
Balanced Diet
Focus on consuming a variety of nutrient-dense foods including fruits, vegetables, whole grains, lean proteins, and healthy fats. Limit processed foods, sugary beverages, and foods high in saturated fats.
Regular Physical Activity
Aim for at least 150 minutes of moderate-intensity aerobic activity or 75 minutes of vigorous activity each week, along with muscle-strengthening activities at least twice a week.
Healthy Lifestyle Habits
Get adequate sleep (7-9 hours for adults), manage stress effectively, and avoid smoking and excessive alcohol consumption.
Frequently Asked Questions About BMI
What is BMI?
BMI (Body Mass Index) is a numerical value calculated from a person’s weight and height. It’s used to categorize whether a person has a healthy body weight for their height.
How is BMI calculated?
BMI is calculated by dividing your weight in kilograms by your height in meters squared (BMI = kg/m²). In imperial units, BMI is calculated as weight in pounds divided by height in inches squared, multiplied by 703.
Is BMI accurate for everyone?
No, BMI has limitations. It may not be accurate for athletes, elderly people, pregnant women, or certain ethnic groups. It doesn’t measure body fat directly or account for muscle mass.
How often should I check my BMI?
For general health monitoring, checking your BMI once or twice a year is sufficient. If you’re on a weight management program, you might want to check it more frequently.
Can children use this BMI calculator?
This calculator is designed for adults. BMI for children and teens (aged 2-19) is calculated differently and interpreted using age and sex-specific percentiles rather than the fixed categories used for adults.
Should I be concerned if my BMI is not in the healthy range?
If your BMI falls outside the healthy range (18.5-24.9), it may be worth discussing with a healthcare provider. However, BMI is just one screening tool and should be considered alongside other health indicators.
Can BMI predict my risk for certain diseases?
While BMI alone cannot predict your individual health risk, research shows that having a BMI in the overweight or obese range is associated with increased risk for certain diseases like type 2 diabetes, heart disease, and certain cancers.
Take Control of Your Health Today
Understanding your BMI is just the first step in your health journey. For personalized advice and a comprehensive health assessment, consult with a healthcare professional.
Regular monitoring of your BMI, along with other health metrics, can help you stay on track with your health goals.