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Body Mass Index (BMI) Calculator
Use our free BMI Calculator to get instant results in seconds.
If you’ve ever wondered whether your weight is healthy for your height, this tool is for you.
Body Mass Index, or BMI, is a quick way to understand if you are underweight, at a healthy weight, overweight, or in the obesity range. It does not judge how you look. It simply gives a number based on your height and weight. That number helps you understand your health risk level.
Many people want a simple answer about their weight. This calculator gives you that answer right away. No signup. No waiting. Just clear results.
Try the Calculator Now
Enter your height and weight below and get your result instantly.
It only takes a few seconds, and you will see your BMI and what it means for you.
How to Use This Calculator
Using the BMI calculator is very easy:
- Enter your height (in feet/inches or centimeters)
- Enter your weight (in pounds or kilograms)
- Click the Calculate button
- Instantly see your BMI result
- Read the weight category shown with your result
That’s it. No complicated steps.
How the BMI Calculation Works
BMI uses a simple math formula with your height and weight.
In words:
Your weight is divided by your height multiplied by itself.
Formula:
BMI = weight (kg) ÷ height (m²)
Don’t worry — the calculator does this for you automatically.
Example:
Let’s say a person weighs 70 kg and is 1.75 meters tall.
First, height × height:
1.75 × 1.75 = 3.06
Then divide weight by that number:
70 ÷ 3.06 = 22.9 BMI
A BMI of 22.9 is in the healthy weight range.
Why People Use a BMI Calculator
People use BMI for many everyday reasons:
Students
They use it in school health lessons and fitness classes.
Families
Parents check BMI to understand their child’s growth and health.
Adults
Many people use BMI when starting a diet or exercise plan.
Fitness beginners
It gives a starting point before making lifestyle changes.
Doctor visits
Doctors often check BMI during regular health checkups.
BMI is not a full health test, but it is a useful first step to understand your weight status.
Frequently Asked Questions (FAQs)
Is BMI accurate for everyone?
BMI works well for most people, but it does not measure body fat directly. Very muscular people may have a high BMI but low body fat.
What is a healthy BMI range?
For most adults, a BMI between 18.5 and 24.9 is considered healthy.
Can children use this BMI calculator?
Children use BMI differently because age and gender matter. A doctor or child-specific BMI chart is better for kids.
Does BMI show how fit I am?
No. BMI only looks at height and weight. Fitness also depends on muscle, heart health, and lifestyle.
Should I see a doctor about my BMI result?
If your BMI is very high or very low, it’s a good idea to talk with a healthcare professional for advice.
Related Calculators You May Like
If you find this BMI calculator helpful, you may also like tools such as a Calorie Calculator to estimate daily energy needs, a Body Fat Calculator for deeper fitness tracking, an Ideal Weight Calculator to see healthy weight ranges, a BMR Calculator to understand your metabolism, and a Water Intake Calculator to stay properly hydrated. These tools work well together to give you a clearer picture of your health.
Learn More About BMI
You can read more about BMI and healthy weight from trusted health sources:
These sites explain how BMI is used and its limits.
Your health journey starts with small steps. Checking your BMI takes only a moment and gives you useful insight right away. Go ahead and enter your details — your result is just seconds away.