FREE HEALTH TOOL
BMI Calculator
Calculate your Body Mass Index in metric or imperial units. See your BMI category, healthy weight range, and where you stand.
Why Use Our BMI Calculator?
Metric and Imperial Support
Switch between kilograms/centimeters and pounds/feet-inches with one click. All conversions are handled automatically.
Four BMI Categories
Results are clearly labeled as Underweight, Normal weight, Overweight, or Obese with the corresponding ranges shown.
Color-Coded Results
Each category has a distinct color - green for normal, orange for overweight, red for obese, and blue for underweight.
Healthy Weight Range
Shows the healthy weight range for your exact height so you know the target, not just your current category.
100% Private
Your height and weight are never sent to any server. All calculation happens locally in your browser.
No Sign-up Required
Open and calculate your BMI immediately with no account needed.
Frequently Asked Questions
What is BMI?
Body Mass Index (BMI) is a number calculated from your height and weight. It is used as a screening tool to identify potential weight-related health risks.
How is BMI calculated?
In metric units: BMI = weight (kg) divided by height (m) squared. In imperial: BMI = (weight in pounds divided by height in inches squared) multiplied by 703.
What BMI is considered healthy?
A BMI between 18.5 and 24.9 is considered normal weight. Below 18.5 is underweight, 25-29.9 is overweight, and 30 or above is obese.
Is BMI an accurate measure of health?
BMI is a useful screening tool but has limitations. It does not distinguish between muscle and fat, and can misclassify very muscular individuals. Always consult a doctor for health assessments.
Is my data private?
Yes. Your height and weight are never sent to any server. All calculation happens locally in your browser.
Is the BMI calculator free?
Yes. Completely free with no sign-up or account required.
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