BMI Calculator
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Instantly calculate your Body Mass Index and see what category you fall into.
Body Mass Index (BMI) is a simple numerical value derived from a person’s height and weight. It is a widely used method to estimate whether an individual is underweight, normal weight, overweight, or obese. Developed in the 1830s by Belgian mathematician Adolphe Quetelet, BMI has become a global standard for preliminary health screening.
BMI was initially introduced as the Quetelet Index, later renamed as Body Mass Index. It was designed to give a general indication of an individual’s body fat levels without requiring complex medical equipment.
The formula differs slightly depending on the unit system:
The result places individuals into categories that help assess potential health risks.
This range may indicate insufficient body fat, leading to a weakened immune system, osteoporosis, or fertility issues.
Considered the healthiest range, it’s associated with lower risk of chronic diseases and improved overall wellness.
Often a warning sign of potential health risks such as high blood pressure and early signs of metabolic syndrome.
This range suggests a high amount of body fat, often linked with serious health conditions including Type 2 diabetes, heart disease, and certain cancers.
Despite its limitations, BMI remains a fast, non-invasive, and accessible screening method for:
Using our intuitive and fast BMI Calculator, you can determine your current BMI in just a few steps.
Upon calculation, you’ll receive:
Use our online tool regularly to stay updated on your weight status and track changes.
BMI = weight (kg) / height² (m²)
Example: 70 kg / (1.75 Ă— 1.75) = 22.9
BMI = [weight (lb) / height² (in²)] × 703
Example: [154 / (69 Ă— 69)] Ă— 703 = 22.7
BMI focuses solely on these two factors because they offer a reliable baseline for estimating body fat—especially useful for quick population health studies.
BMI is a useful tool, but it doesn’t tell the full story.
Athletes may have high BMI due to muscle mass—not fat—leading to misleading results.
Certain ethnic groups naturally carry weight differently, and aging can affect muscle vs. fat distribution.
For those under 20, BMI is compared using percentile charts to account for age and growth rate. Pediatricians often use:
Higher BMI increases insulin resistance, a major risk factor for Type 2 diabetes.
Excess body weight raises blood pressure, cholesterol, and plaque buildup, all contributing to heart issues.
A BMI over 30 significantly increases the chance of developing:
Doctors use BMI as a starting point for broader diagnostic workups. It helps flag potential issues quickly.
Some employers and insurance providers request BMI data to assess risk levels or determine premium rates.
Because kids grow at different rates, BMI is interpreted relative to peers using percentiles, not fixed categories.
A better indicator of abdominal fat, which is linked to heart disease.
Gives a more accurate view of fitness level, especially useful for athletes.
Estimates daily calorie needs. Useful alongside BMI for weight management planning.
Between 18.5 and 24.9 is considered healthy for adults.
Yes. BMI doesn’t distinguish between muscle and fat, so athletes may appear overweight.
No. Kids should use age-specific percentiles, not standard adult ranges.
Every 1–2 months is a good interval unless advised otherwise by your doctor.
Yes. While the calculation is the same, body composition differences can affect interpretation.
You can lower weight (and BMI) with a healthy diet, but combining with exercise gives faster and more sustainable results.
Whether you’re starting a new fitness journey or simply monitoring your health, our BMI Calculator provides a quick and effective snapshot of your current weight status. It’s easy to use, accurate, and tailored to help you make better health choices.
Don’t guess your health—measure it. Use our BMI Calculator today and take the first step toward a balanced, healthier life.