BMI Calculator - Healthy & Fit
Calculate your Body Mass Index quickly with a clean, simple interface. Now available in 20 languages. Get instant health category indicators and track your fitness goals.
Key Features
Instant Results
Calculate your BMI in seconds with a simple, clean interface.
Health Categories
See your health classification: underweight, normal, overweight, or obese.
20 Languages
Fully localized in 20 languages — use the app in your native language.
Completely Free
No ads interrupting your experience. Totally free to use.
About BMI Calculator - Healthy & Fit
BMI Calculator helps you quickly determine your Body Mass Index and understand what it means for your health. With a clean, intuitive interface, it provides instant results along with health category classifications (underweight, normal, overweight, obese). Now localized in 20 languages — English, Arabic, Bangla, Chinese (Simplified), Dutch, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Malay, Polish, Portuguese, Russian, Spanish, Thai, Turkish, and Vietnamese — so you can use the app in your native language. Simple, fast, and completely free.
What BMI actually measures
Body Mass Index is your weight divided by the square of your height. That is the whole formula, and its simplicity is both why it is used everywhere and why it is so often misread. It was designed in the nineteenth century to describe populations, not to diagnose individuals.
The standard categories are: below 18.5 underweight, 18.5 to 24.9 normal, 25.0 to 29.9 overweight, and 30.0 or above obese. The app reports your figure and the category it falls in.
Where the number misleads
BMI does not know the difference between muscle and fat. A rower and a sedentary person of the same height and weight get the same score, and well-muscled athletes are routinely classified as overweight by a measure that was never intended to assess them.
It also ignores where weight sits, which matters clinically — abdominal fat carries different risk from the same mass elsewhere. And the standard thresholds were derived largely from European populations; several health bodies use lower cut-offs for people of South and East Asian descent, because associated risk appears at a lower BMI.
Treated as one rough input among several, it is useful. Treated as a verdict on your health, it is not.
Metric, imperial and 20 languages
The calculator takes centimetres and kilograms or feet, inches and pounds, and converts internally, so you do not have to. The interface is localised into twenty languages — English, Arabic, Bangla, Chinese (Simplified), Dutch, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Malay, Polish, Portuguese, Russian, Spanish, Thai, Turkish and Vietnamese.
Nothing is uploaded. Your height and weight are health data, and they stay on the device.
Frequently Asked Questions
What are the BMI categories?
Below 18.5 is classified underweight, 18.5 to 24.9 normal, 25.0 to 29.9 overweight, and 30.0 or above obese. These are the widely used thresholds, though several health authorities apply lower cut-offs for people of South and East Asian descent.
Is BMI accurate for athletes?
Not really. BMI cannot distinguish muscle from fat, so someone with high muscle mass often scores as overweight despite low body fat. For muscular builds, body composition measurements are far more informative than BMI.
Does it support both metric and imperial units?
Yes — enter centimetres and kilograms, or feet, inches and pounds. Conversion happens inside the app, so you can use whichever units you actually think in.
Is my health data sent anywhere?
No. The calculation runs entirely on your device and your height and weight are never transmitted. There is no account and no server involved.
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