BMI Calculator
Calculate your Body Mass Index (BMI) to understand your weight category and get personalized health recommendations based on your height and weight.
Your BMI Results
Your BMI
24.2
Normal weight
Healthy BMI range
18.5 - 24.9
BMI Categories
Underweight
BMI < 18.5
Normal
18.5 - 24.9
Overweight
25 - 29.9
Obese
BMI ≥ 30
Health Recommendations
Your BMI suggests you're at a healthy weight. Maintain your current lifestyle with balanced nutrition and regular physical activity.
Your Ideal Weight Range
59.9 kg - 81.0 kg (132 lbs - 179 lbs)
BMI Calculator
Why is knowing my BMI useful?
Your Body Mass Index (BMI) offers a simple way to assess whether you have a healthy body weight relative to your height. It helps identify potential risks for conditions like obesity, underweight, or malnutrition.
How to Find Percent Composition?
Percent composition is the percentage by mass of each element in a compound. To find it, divide the mass of each individual element by the total molar mass of the compound, then multiply by 100. This helps identify how much of a substance is made up of each specific element, which is essential in chemistry for analyzing formulas and reactions.
How to Find Weight?
Weight is calculated using the formula: Weight = Mass × Gravity. On Earth, gravity is approximately 9.8 m/s². So if an object’s mass is 60 kg, its weight equals 60 × 9.8 = 588 Newtons. This scientific method differs from everyday scale readings, which typically reflect mass.
How to Calculate BMI for Athletes?
To calculate BMI for athletes, use the standard formula: BMI = weight (kg) / [height (m)]². However, keep in mind that athletes often have higher muscle mass, which can lead to a higher BMI despite low body fat. For a more accurate picture, consider combining BMI with other tools like body fat percentage, waist-to-hip ratio, or professional assessments.
BMI (Body Mass Index)
BMI is a measurement of a person's leanness or corpulence based on their height and weight, and is intended to quantify tissue mass. It is widely used as a general indicator of whether a person has a healthy body weight for their height.
How to Determine BMI?
Determining your Body Mass Index (BMI) involves calculating a value based on your weight and height, which helps estimate whether you’re underweight, normal, overweight, or obese. In metric units, divide your weight in kilograms by the square of your height in meters:
BMI = weight (kg) ÷ [height (m)]²
For measurements in pounds and inches, the formula includes a conversion factor to account for the units:
BMI = [weight (lbs) ÷ [height (in)]²] × 703
BMI Categories
| Category | BMI Range | Health Risk |
|---|---|---|
| 180 cm / 5'11" | Typical adult male height | Use with weight to calculate BMI accurately |
| 25 inch waist | Small waist measurement | May indicate low body fat, useful for waist-to-height ratio |
| 62.4 kg to lbs | 137.6 lbs | Converted for imperial BMI calculation |
| 67.7 kg to lbs | 149.3 lbs | Used in BMI for average female height |
| 23.5 kg to lbs | 51.8 lbs | Commonly used for children’s BMI assessments |
Limitations of BMI calculator
- Fails to separate lean muscle from body fat, leading to misleading results for fit individuals.
- Ignores how fat is distributed across the body, which affects health risks differently.
- May underestimate health risks in seniors due to natural muscle decline over time.
- Doesn't reflect genetic or ethnic variations in healthy body composition.
- Inappropriate for children and teens without using age- and sex-specific growth charts.
BMI Calculator Health Tip:
While BMI is a quick way to estimate body fat, it doesn't account for muscle, bone density, or fat distribution. For a more accurate view of your health, combine BMI with waist size, physical activity, diet, and professional medical advice.