BMI Calculator
Calculate your Body Mass Index (BMI) to understand your weight status and health risks.
Your Information
Example: 5'10" (178 cm), 165 lbs (75 kg)
VitalMetrics - BMI Calculator
11/2/2025
Your BMI
BMI Scale
For informational purposes only. Always consult with a healthcare provider for medical advice. Learn more
How BMI is Calculated
Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is:
BMI was developed by Belgian statistician Adolphe Quetelet in the 1830s. While originally designed for population studies, it has become a widely used screening tool for weight categories that may indicate health problems.
The calculation is the same for both men and women and for adults of all ages. However, BMI interpretation may vary for children and teens.
Understanding Your Results
Underweight (BMI < 18.5)
Being underweight may indicate malnutrition, an eating disorder, or other health problems. Consider consulting a healthcare provider if you fall into this category.
Normal Weight (BMI 18.5 - 24.9)
This range is associated with the lowest health risks. Maintaining a healthy weight through balanced nutrition and regular physical activity is important for overall health.
Overweight (BMI 25 - 29.9)
Being overweight increases the risk of developing various health conditions including heart disease, high blood pressure, type 2 diabetes, and certain cancers. Lifestyle changes may help reduce these risks.
Obese (BMI ≥ 30)
Obesity significantly increases the risk of serious health problems. It's important to work with healthcare providers to develop a plan for achieving a healthier weight through diet, exercise, and potentially medical interventions.
Limitations of BMI
While BMI is a useful screening tool, it has several important limitations:
- •Athletes and Muscular Individuals: BMI doesn't distinguish between muscle and fat mass. Athletes with high muscle mass may be classified as overweight despite having low body fat.
- •Elderly: Older adults may have a healthy BMI while having reduced muscle mass and strength.
- •Body Composition: Two people with the same BMI can have very different body fat percentages and health risks.
- •Ethnic Differences: Health risks associated with BMI may vary among different ethnic groups.
- •Pregnant Women: BMI is not an appropriate measure during pregnancy.
For a comprehensive health assessment, BMI should be used alongside other measurements such as waist circumference, waist-to-hip ratio, body fat percentage, and overall health evaluation.
Medical Disclaimer
This BMI calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider before making any decisions about your health or starting any weight management program. Your healthcare provider can assess your individual health status and provide personalized recommendations.
BMI Health Tips & Recommendations
Evidence-based guidance for healthy weight management
Focus on sustainable habits: Rapid weight changes can be harmful. Aim for gradual, sustainable changes through balanced nutrition and regular physical activity. A safe rate is 0.5-1 kg (1-2 lbs) per week for weight loss.
Combine diet and exercise: The most effective approach to healthy weight management combines a balanced, calorie-appropriate diet with regular physical activity. Aim for at least 150 minutes of moderate aerobic activity per week.
Track multiple metrics: Don't rely on BMI alone. Monitor waist circumference, body fat percentage, energy levels, and how your clothes fit. These provide a more complete picture of your health progress.
Stay hydrated: Proper hydration supports metabolism and can help control appetite. Aim for 8-10 glasses of water daily, adjusting for activity level and climate.
Get quality sleep: Poor sleep affects hormones that regulate hunger and metabolism. Adults should aim for 7-9 hours of quality sleep per night to support healthy weight management.
Consult healthcare professionals: Before starting any weight management program, especially if you have health conditions or need to lose significant weight, consult with a healthcare provider or registered dietitian for personalized guidance.
Frequently Asked Questions
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