Utilz
BMI Calculator
Calculate your Body Mass Index instantly
Want to learn more? Read our guide: Understanding BMI & Body Composition
Why Use a BMI Calculator?
- Quickly assess whether your weight is in a healthy range for your height.
- Track weight management progress over time with a simple, standardized metric.
- Identify potential health risks associated with being underweight or overweight.
- No signup or app download needed — get instant results in your browser.
BMI Formula
BMI = Weight (kg) ÷ Height (m)². For example, if you are 170 cm tall and weigh 65 kg: BMI = 65 ÷ (1.70 × 1.70) = 22.5 (Normal weight).
How to Use
- Enter your height in cm
- Enter your weight in kg
- Your BMI result and category appear instantly
FAQ
What is a healthy BMI range?
A healthy BMI is between 18.5 and 24.9. Below 18.5 is considered underweight, 25-29.9 is overweight, and 30 or above is classified as obese.
How accurate is BMI?
BMI is a useful screening tool but does not directly measure body fat. It may not be accurate for athletes with high muscle mass or elderly individuals.
How do I calculate BMI manually?
BMI is calculated by dividing your weight in kilograms by your height in meters squared. The formula is: BMI = weight (kg) / height (m)^2.
Does BMI apply to children?
For children and teens, BMI is interpreted differently using age- and sex-specific percentiles. This calculator is designed for adults aged 20 and older.
Is BMI different for men and women?
The BMI formula is the same for both men and women. However, women naturally carry more body fat, so a healthy body fat percentage differs by gender even at the same BMI.