BMI Calculator
Calculate your Body Mass Index (BMI) to understand your weight status and get personalized health recommendations.
BMI Calculator
Modify the values and click the calculate button to use
ages: 2 - 120
Result
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Enter your details to calculate your BMI
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How to Use This Calculator
Step-by-step guide to get accurate results
1
What is a BMI Calculator?
A BMI Calculator (Body Mass Index Calculator) is a health tool that measures body fat based on height and weight. It gives you a BMI score that falls into categories such as underweight, normal, overweight, or obese.
Our free online BMI Calculator supports both kg & cm and lbs & inches, making it useful worldwide (USA, UK, India, Pakistan, Canada, Australia, etc.).
Our free online BMI Calculator supports both kg & cm and lbs & inches, making it useful worldwide (USA, UK, India, Pakistan, Canada, Australia, etc.).
2
BMI Definition and Calculation
BMI is calculated using height and weight.
Formula (Metric): BMI = Weight (kg) ÷ Height (m)²
Formula (Imperial): BMI = (Weight (lbs) × 703) ÷ Height (in)²
Formula (Metric): BMI = Weight (kg) ÷ Height (m)²
Formula (Imperial): BMI = (Weight (lbs) × 703) ÷ Height (in)²
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How to Calculate BMI Online (Step-by-Step Guide)
Steps to calculate BMI using our free online calculator:
Step 1
Choose your measurement unit: kg/cm or lbs/inches.
Step 2
Enter your weight in kilograms or pounds.
Step 3
Enter your height in centimeters or inches.
Step 4
Select age & gender (optional) for better insights.
Step 5
Click Calculate BMI → Instantly see your BMI score and category.
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BMI Categories (WHO Standard BMI Chart)
Underweight
Below 18.5
Normal Weight
18.5 – 24.9
Overweight
25 – 29.9
Obesity (Class 1)
30 – 34.9
Obesity (Class 2)
35 – 39.9
Obesity (Class 3 / Severe)
40+
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Why Use a BMI Calculator?
Track Fitness Goals
Monitor progress with a Fitness BMI Calculator.
Compare BMI vs Body Fat
Useful for athletes and gym users.
Medical Use
Recommended by doctors as a quick health check.
Assess Health Risks
BMI helps identify risk of obesity-related conditions.
Nutrition Tracking
Supports balanced diet planning and wellness goals.
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BMI Calculator by Age and Gender
For Men & Women
Separate BMI tracking for gender-specific insights.
For Kids & Teenagers
Uses BMI percentile charts for growth monitoring.
For Adults & Seniors
Age-based adjustments for accurate results.
Pregnancy BMI Calculator
Helps monitor maternal health during pregnancy.
7
Global and Local BMI Calculator
Our Global BMI Calculator works worldwide with region-specific formats:
USA
Uses lbs/inches format.
UK
Widely applied in healthcare and fitness.
India & Pakistan
Uses kg/cm with WHO standards.
Canada & Australia
kg/cm format + BMI charts for health monitoring.
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Ideal BMI Calculator – Find Your Healthy Weight
Overweight BMI Calculator
Supports weight-loss planning.
Underweight BMI Calculator
Helps identify nutrition needs.
Obesity BMI Calculator
Shows risks linked with obesity.
Frequently Asked Questions
What is a BMI Calculator?
A BMI Calculator measures your body mass index, showing if your weight is healthy for your height.
What is the normal BMI range?
According to WHO, a normal BMI is 18.5 to 24.9.
Is BMI accurate for everyone?
BMI is a good screening tool but may not be accurate for athletes, pregnant women, or seniors.
How do I calculate BMI manually?
Use the formula: Weight (kg) ÷ Height (m²) or Weight (lbs) × 703 ÷ Height (in²).
Can I use BMI Calculator for children?
Yes, BMI percentile charts are used for kids and teenagers.
Is this BMI calculator free?
Yes, it’s a free online tool available worldwide.
What is the best BMI calculator online in 2025?
Our BMI Calculator is accurate, globally compatible, and provides health tips, making it one of the best options in 2025.