BMI Calculator Online Free
Calculate your Body Mass Index online for free. Enter your height and weight to see your BMI, category and healthy weight range instantly.
Your Details
Your BMI Result
Enter your details
Your BMI category and weight range will appear here.
How to Use the BMI Calculator
Calculate Body Mass Index in three simple steps.
1. Choose units
Select metric or imperial measurements.
2. Enter height and weight
Add your current height and weight values.
3. View BMI result
See your BMI, category and healthy weight range instantly.
Understand your Body Mass Index quickly.
This BMI Calculator helps estimate whether a weight is in a common range for a given height. It is useful for quick personal reference, wellness tracking and general educational purposes.
You can calculate BMI using metric or imperial units, view your BMI category, estimate a healthy weight range and copy the result instantly.
What is BMI?
BMI stands for Body Mass Index. It is a height-to-weight calculation commonly used as a general screening estimate for adult weight categories.
BMI does not directly measure body fat, muscle mass or individual health status, so it should be used as a general reference only.
When should you use it?
- Checking a quick Body Mass Index estimate
- Comparing metric and imperial BMI values
- Estimating a healthy weight range
- Tracking general wellness progress
- Learning common BMI category ranges
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BMI Calculator FAQ
Common questions about BMI and Body Mass Index.
What is BMI?
BMI stands for Body Mass Index. It is a height-to-weight calculation used as a general screening estimate.
How is BMI calculated?
BMI is calculated as weight in kilograms divided by height in meters squared.
What is a normal BMI?
For many adults, a BMI from 18.5 to 24.9 is commonly classified as the normal range.
Is BMI always accurate?
No. BMI does not directly measure body fat and may be less useful for athletes, pregnant people, children or people with specific medical conditions.
Can I use pounds and feet?
Yes. This BMI calculator supports metric units and imperial units.
Does BMI diagnose health problems?
No. BMI is only a general screening tool and does not replace medical advice.
Can I copy my BMI result?
Yes. Click Copy Summary to copy your BMI result and category.
Does it work on mobile?
Yes. This BMI calculator works on desktop, tablet and mobile browsers.