Calculate your Body Mass Index (BMI) instantly to understand your weight category, get healthy weight range, and receive personalized health insights based on WHO standards. Supports both metric and imperial units.
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Our BMI Calculator is a precise tool that helps you determine your Body Mass Index, a measure of body fat based on your height and weight. It provides instant results with category analysis and health recommendations based on World Health Organization (WHO) standards.
BMI is widely used by healthcare professionals to screen for weight categories that may lead to health problems. While it's a useful screening tool, it's important to remember that BMI doesn't directly measure body fat and may not account for muscle mass, bone density, and other factors.
Our calculator supports both metric (kilograms and centimeters/meters) and imperial (pounds and feet/inches) measurement systems for your convenience.
Important Note: BMI is for adults 20 years and older. It may not be accurate for athletes, pregnant women, or the elderly. Always consult with healthcare professionals for personalized health advice.
Note: BMI is a screening tool, not a diagnostic measure. Consult healthcare professionals for personalized health advice.
Our BMI Calculator is valuable for various individuals and professionals who want to monitor weight status and health risks. Here's who can benefit from this tool:
Doctors, nurses, and dietitians use BMI as a quick screening tool for assessing weight-related health risks in patients.
Track progress, set weight goals, and monitor changes during fitness journeys and weight management programs.
Anyone curious about their weight status, wanting to understand if they're in a healthy weight range for their height.
Collect BMI data for studies, analyze population health trends, and monitor public health indicators.
HR departments and wellness coordinators use BMI screening for employee health assessments and wellness initiatives.
Educators and school nurses monitor student health, identify potential concerns, and promote healthy habits.
Assess client weight status, develop personalized nutrition plans, and track progress in weight management programs.
Monitor community health trends, identify population health risks, and develop public health interventions.
BMI (Body Mass Index) is a measure of body fat based on your weight in relation to your height. It's calculated using the formula: BMI = weight(kg) / height(m)² for metric units, or BMI = (weight(lbs) / height(in)²) × 703 for imperial units.
• Underweight: BMI less than 18.5
• Normal weight: BMI 18.5 to 24.9
• Overweight: BMI 25 to 29.9
• Obese Class I: BMI 30 to 34.9
• Obese Class II: BMI 35 to 39.9
• Obese Class III: BMI 40 or higher
BMI has limitations and may not be accurate for:
• Athletes with high muscle mass
• Pregnant or breastfeeding women
• Children and teenagers
• Elderly individuals
• People with certain medical conditions
It's a screening tool, not a diagnostic measure of body fat percentage.
For most adults, a healthy BMI ranges from 18.5 to 24.9. This range is associated with the lowest risk of weight-related health problems according to the World Health Organization (WHO).
No, this calculator is designed for adults 20 years and older. Children and teenagers need age and sex-specific BMI percentiles, which are calculated differently. Pediatric BMI calculators should be used for individuals under 20.
For general monitoring, checking your BMI every 1-3 months is sufficient. If you're actively trying to lose or gain weight, you might check more frequently. Significant changes in BMI should be discussed with a healthcare provider.
BMI doesn't distinguish between muscle and fat. If you're athletic with significant muscle mass, your BMI might classify you as overweight even with low body fat. In such cases, body fat percentage measurements or waist-to-hip ratio may provide more accurate assessments.
High BMI (overweight and obesity) increases risk of:
• Type 2 diabetes
• Heart disease
• High blood pressure
• Stroke
• Certain cancers
• Sleep apnea
• Osteoarthritis
Low BMI (underweight) increases risk of:
• Malnutrition
• Weakened immune system
• Osteoporosis
• Fertility issues
• Anemia
• Increased surgical complications
Yes! SKY Converter Tools provides this BMI calculator completely free with no registration required. No hidden fees, subscriptions, or personal data collection.
For high BMI: Balanced diet, regular exercise, portion control, and professional guidance.
For low BMI: Nutrient-dense foods, strength training, and medical consultation if needed.
Always consult healthcare professionals before making significant lifestyle changes.