Calculators
BMI Calculator
Calculate Body Mass Index (BMI) from height and weight, and see the WHO adult category.
- Mobile Friendly
- Accessibility Tested
- Formula Verified
- SEO Optimized
- Fast Loading
- Responsive
Version 1.0.0 · Last reviewed
Tool
Result
Live output from your inputs
Enter values and calculate to see results.
How it worksShow guideHide guide
Introduction
The BMI calculator estimates Body Mass Index from height and weight using the standard adult formula. It is a screening tool, not a diagnosis of body fatness or health.
Disclaimer: This tool is for informational purposes only and is not professional medical, financial, or tax advice.
Formula
Body Mass Index is body weight in kilograms divided by the square of height in meters.
- w — Weight in kilograms (kg)
- h — Height in meters (m)
- BMI — Body Mass Index in kg/m²
Step-by-step
- Enter your height in centimeters.
- Enter your weight in kilograms.
- Convert height to meters by dividing by 100.
- Square the height in meters.
- Divide weight by height squared to get BMI.
- Match the BMI value to an adult category band.
Worked example
For a person who is 170 cm tall and weighs 65 kg: height in meters is 1.70, height squared is 2.89, and BMI is 65 ÷ 2.89 ≈ 22.5 (Normal weight).
Use cases
- Quickly estimate BMI for personal tracking
- Compare results against WHO adult BMI categories
- Understand how height and weight interact in the BMI formula
Frequently asked questions
What is a healthy BMI range for adults?
For most adults, a BMI between 18.5 and 24.9 is classified as normal weight by WHO categories. Individual health needs can differ.
Is BMI accurate for athletes?
BMI does not distinguish muscle from fat, so muscular people may show a higher BMI without excess body fat. Use it as one signal among others.
Does this calculator work for children?
No. Child and teen BMI uses age- and sex-specific percentiles. This tool uses the adult BMI formula only.
What units does the calculator use?
Height is entered in centimeters and weight in kilograms. The result is expressed in kg/m².
Related tools
Popular tools
Calorie & Macro Calculator
Estimate daily calorie needs from BMR and activity, with a simple goal adjustment and macro split.
Loan EMI Calculator
Calculate equated monthly installment (EMI), total interest, and total payment for a fixed-rate loan.
Compound Interest Calculator
Estimate future value and interest earned with compound interest for any principal, rate, term, and compounding frequency.
Was this helpful?
Your feedback stays on this device only — it is not sent to the mySutra team yet.