Smart BMI Calculator Online
BMI Playground
Fun, responsive & trackable — works in India / USA / CA / AU and worldwide
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Smart BMI Calculator – Check Your Body Mass Index Instantly
This free BMI Calculator helps you calculate your Body Mass Index instantly using kg/cm or ft/in. It works perfectly for users across India, USA, Canada, Australia, and other countries. The tool is accurate, fast, and easy to use — designed to give you a clear understanding of your BMI and what it means for your body.
How to Use This BMI Calculator
Follow these simple steps to check your BMI:
Enter your weight in kg or lbs.
Enter your height in cm or ft/in.
Tap Calculate.
Instantly get your BMI value, category, and interpretation.
Optional: save, copy, or share your result for future reference.
Our tool automatically adjusts units based on your region (India = kg/ft/in, USA = lbs/ft/in).
What Is BMI?
It’s widely used by health professionals around the world as a simple screening tool — but it’s not a medical assessment.
BMI helps categorize your body status into:
Underweight
Normal
Overweight
Obese
BMI Formula
The BMI calculation is straightforward.
Metric Formula (kg/cm)
BMI = Weight (kg) / Height (m²)
Example: 70 kg / (1.70 × 1.70)
Imperial Formula (lbs + inches)
BMI = (Weight (lbs) × 703) / Height (in²)
This calculator supports both automatically.
BMI Chart & Categories
Below is the standard WHO-approved BMI classification:
| BMI Range | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Normal Weight |
| 25 – 29.9 | Overweight |
| 30 & Above | Obese |
These ranges apply only to adults aged 18+.
BMI Chart & Categories
Here are some quick examples to help you understand BMI better:
| Weight | Height | BMI | Category |
|---|---|---|---|
| 50 kg | 160 cm | 19.5 | Normal |
| 70 kg | 170 cm | 24.2 | Normal |
| 80 kg | 165 cm | 29.4 | Overweight |
| 95 kg | 175 cm | 31.0 | Obese |
What Affects Your BMI?
BMI gives a simple indication of your weight status, but it does not measure:
Muscle mass
Body fat percentage
Bone density
Gender-specific differences
However, it’s still a useful starting point for basic health tracking.
Why Monitoring BMI Is Important
Regularly tracking your BMI helps you:
Understand whether your current weight is healthy
Adjust your diet or habits if needed
Identify early signs of overweight or obesity
Set fitness goals with more clarity
Our tool includes history tracking, so you can check how your BMI changes over time.
Frequently Asked Questions
What is a healthy BMI?
For most adults, a healthy BMI is between 18.5 and 24.9.
Is BMI accurate?
BMI is a quick estimate, not a medical measurement. It doesn’t consider muscle or fat distribution.
Can I calculate BMI with feet and inches?
Yes - this tool supports both cm and ft/in.
What BMI is considered overweight?
A BMI of 25–29.9 is categorized as Overweight.
What BMI indicates obesity?
A BMI of 30 or above is considered Obese.
Can kids use this BMI calculator?
No. BMI for children uses age-specific percentiles. This tool is for adults only.
How often should I check my BMI?
Most people track BMI monthly or weekly, depending on fitness goals.
Disclaimer
This BMI Calculator is for adults only. It provides general information and is not a medical diagnosis. Consult a healthcare professional for personalized health advice.