BMI Calculator
BMI Calculator gives you a quick way to check your Body Mass Index. Enter your height and weight in metric or imperial units to instantly see your BMI score and standard weight category.
How to Use
Step 1
Choose Metric or Imperial Units
Select whether you want to enter your measurements in kilograms and centimeters, or pounds, feet, and inches — whichever your scale and tape measure already use.
Step 2
Enter Your Height and Weight
Type your current height and weight into the fields — you can switch unit systems at any time without losing your entry, which is handy if you want to double-check the result in both systems.
Step 3
Calculate Your BMI
The tool instantly computes your Body Mass Index score from your height and weight the moment both fields are filled in.
Step 4
Review Your Category and Healthy Range
See which standard category your BMI falls into — Underweight, Normal, Overweight, or Obese — along with a healthy weight range for your height, so you know roughly where your current weight sits right now and how much room there is before it moves into the next category up or down.
Key Features
Dual Unit Support
Switch seamlessly between metric (kg/cm) and imperial (lbs/feet/inches) system parameters.
Instant Health Categorization
Automatically classifies your results into standard WHO health categories (Underweight, Normal, Overweight, Obese).
Ideal Weight Range Insight
Displays your recommended healthy target weight based on your specific height parameters.
Total Data Privacy
Protect personal health data as all calculations happen locally in your browser without saving server records.
Frequently Asked Questions
A BMI between 18.5 and 24.9 is generally classified as a normal, healthy weight range for adults, based on standard WHO guidelines used by most health organizations worldwide.
This calculator classifies results into four standard categories: Underweight (under 18.5), Normal (18.5–24.9), Overweight (25–29.9), and Obese (30 and above), matching the widely used adult BMI scale.
Yes — you can toggle between metric (kg/cm) and imperial (lbs/feet-inches) units at any time, and the tool recalculates your BMI accordingly without needing to re-enter your numbers.
BMI is a useful general screening tool, but it doesn't account for muscle mass, bone density, or body composition, so athletes or very muscular people may see a higher BMI than their actual body fat percentage would suggest.
No. All calculations run locally in your browser, and the figures you enter are never saved or transmitted to our servers, so your health data stays private, whether you're checking your own BMI or a family member's.
No signup or account is required — this BMI calculator is free to use directly in your browser, anytime, on any device, and you can recheck your BMI as often as you update your height or weight.
No. Age and gender are optional fields for extra context, but the BMI Calculator only needs your height and weight to work. Switch between metric (cm/kg) or imperial (feet-inches/lbs) units, and the tool instantly shows your calculated BMI score, standard weight category, and a healthy weight range based on your height.
Related Tools
