βοΈ BMI Calculator
<18.5Normal
18.5β24.9Overweight
25β29.9Obese
>30
Free BMI Calculator β Check Your Body Mass Index Online
Our free BMI Calculator is a quick and easy way to assess whether your weight is in a healthy range for your height. BMI is widely used by healthcare professionals and organizations like the World Health Organization (WHO) as a screening tool for weight categories.
What is BMI?
Body Mass Index (BMI) is a numerical value calculated from a person's weight and height. The formula is: BMI = Weight (kg) Γ· Height (m)Β². It provides a simple indicator of whether a person is underweight, normal weight, overweight, or obese.
BMI Categories (WHO Standards)
- Below 18.5: Underweight β may indicate malnutrition or health issues
- 18.5 to 24.9: Normal weight β healthy range for most adults
- 25 to 29.9: Overweight β increased risk of health conditions
- 30 and above: Obese β significantly increased risk of serious health issues
BMI Limitations
While BMI is a useful screening tool, it has limitations. It does not account for muscle mass, bone density, body composition, or fat distribution. Athletes and bodybuilders may have a high BMI but be perfectly healthy. BMI should be considered alongside other health assessments by a medical professional.
How to Maintain a Healthy BMI
- Eat a balanced, nutritious diet with appropriate caloric intake
- Engage in regular physical activity (at least 150 minutes moderate exercise/week)
- Maintain adequate sleep (7β9 hours/night)
- Manage stress levels
- Consult a healthcare professional for personalized advice
Try also: Age Calculator, Kg to Lb Converter.
Frequently Asked Questions
According to the World Health Organization, a BMI of 18.5β24.9 is considered normal/healthy for adults. However, for Asian populations, some health organizations recommend a lower healthy range of 18.5β22.9.
BMI is a general screening tool, not a diagnostic measure. It may not be accurate for athletes (higher muscle mass), elderly people (bone loss), pregnant women, or children. Consult a doctor for proper health assessment.
Ideal weight range = BMI of 18.5β24.9 Γ Height (m)Β². For someone 170 cm (1.7 m): Min = 18.5 Γ 1.7Β² = 53.5 kg, Max = 24.9 Γ 1.7Β² = 71.9 kg.
For South Asians including Indians, some health organizations recommend a BMI of 18.5β22.9 as the normal range due to higher risk of metabolic diseases at lower BMI levels compared to Western populations.