Calculate your Body Mass Index (BMI) instantly. Free, accurate, and works with metric or imperial units. Know if you're underweight, normal, overweight, or obese.
Your BMI indicates a normal weight. Maintain a balanced diet and regular exercise to stay healthy.
Calculate your Body Mass Index in 3 simple steps:
Choose your gender and enter your age. These help provide more accurate health recommendations based on your demographics.
Input your height and weight. You can use the slider for quick adjustments or type exact values. Switch between metric (kg/cm) and imperial (lb/ft) units.
See your BMI instantly with color-coded category (underweight, normal, overweight, obese). Get your healthy weight range and personalized advice.
Weight: 70 kg
Height: 170 cm = 1.70 meters
Formula: 70 ÷ (1.70 × 1.70)
BMI: 70 ÷ 2.89 = 24.2
Category: Normal Weight (18.5 - 24.9)
Health Status: Healthy weight range - maintain with balanced diet and exercise!
Health Risks: Malnutrition, weakened immune system, osteoporosis, anemia
Recommendation: Increase calorie intake with nutrient-rich foods. Consult a dietitian for a healthy weight gain plan.
Health Status: Healthy weight range with lower disease risk
Recommendation: Maintain current weight with balanced diet, regular exercise, and healthy lifestyle habits.
Health Risks: Increased risk of heart disease, type 2 diabetes, high blood pressure
Recommendation: Focus on portion control, increase physical activity, and consider professional guidance for weight management.
Health Risks: High risk of cardiovascular disease, diabetes, certain cancers, sleep apnea
Recommendation: Consult healthcare provider immediately. Create comprehensive weight loss plan with medical supervision.
Get your BMI calculated instantly as you adjust values. Real-time updates with visual color-coded categories.
Switch between kg/cm and lb/ft units. Works for users worldwide with automatic conversions.
Uses WHO-approved BMI formula. Get accurate results matching medical standards globally.
See where you stand with interactive BMI range charts and healthy weight recommendations.
All calculations happen in your browser. Your health data never leaves your device.
Calculate BMI on your phone, tablet, or computer with the same great experience.
BMI (Body Mass Index) is a measure of body fat based on height and weight. It's important because it helps assess if you're at a healthy weight, which reduces risk of diseases like diabetes, heart disease, and certain cancers.
BMI is a useful screening tool but not perfect. It doesn't account for muscle mass, bone density, or body composition. Athletes with high muscle mass may have high BMI but low body fat. Consult a healthcare provider for complete health assessment.
A healthy BMI is between 18.5 and 24.9 for adults. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese. These ranges may vary slightly by ethnicity and individual factors.
Check your BMI every 3-6 months if you're actively trying to lose or gain weight. For general health monitoring, checking 2-4 times a year is sufficient. Focus more on overall health trends than day-to-day fluctuations.
This calculator works for ages 2+, but BMI interpretation for children and teens is different. Children's BMI must be compared to growth charts specific to age and gender. Consult a pediatrician for accurate child BMI assessment.
If your BMI is 25 or higher, focus on healthy eating, regular exercise, and lifestyle changes. Consult a healthcare provider or registered dietitian for personalized weight management plan. Small, consistent changes lead to sustainable results.
The BMI formula is the same for both genders, but women naturally have more body fat than men. Our calculator considers gender for more accurate health recommendations. However, the standard BMI categories (18.5-24.9) apply to both.
Yes! Use the unit selector at the top to switch between metric (kg/cm) and imperial (lb/ft) units. The calculator automatically converts your inputs and updates results instantly.
