BMI Calculator & Ideal Weight
HealthGet your health classification instantly.
Get a quick BMI reading and its weight classification from your weight and height.
What is BMI Calculator?
Body Mass Index compares your weight to your height and is the standard first screening for underweight, normal, overweight and obese categories. This calculator also shows the healthy weight range for your exact height, so you know the target zone rather than just a number. Enter your measurements in metric (kg/cm) or imperial (lb/ft-in) units and get your category instantly, along with how far you are from the healthy range. Everything is computed in your browser โ your health data is never stored or sent anywhere.
Last updated: September 2026
How to use BMI Calculator
- 1Enter your Weight in kilograms (for example 70).
- 2Enter your Height in centimeters (for example 175).
- 3The BMI value and classification (Underweight / Normal / Overweight / Obese) appear instantly.
Formula
BMI = weight(kg) รท height(m)ยฒ
Example
70 kg รท (1.75 m)ยฒ โ BMI โ 22.9 (Normal).
FAQs
What is a healthy BMI range?
For most adults, a BMI between 18.5 and 24.9 is considered healthy. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ falls in the obese range.
How much should I weigh for my height?
The calculator shows the ideal weight range for your height โ the weights that correspond to a BMI of 18.5 to 24.9. Muscle mass and body composition matter too, so treat it as a guide, not a verdict.
Does BMI change with age or gender?
The standard BMI formula is the same for adult men and women, but its interpretation can shift with age โ older adults often have a slightly higher healthy range. Athletes with high muscle mass may read as overweight without being overfat.
