How to use this bmi calculator
Enter the requested values above and select Calculate. The result updates immediately on the page, so you can change one value and compare different scenarios without leaving the calculator.
Formula and method
Example
A person who is 5 ft 10 in and 170 lb has a BMI of about 24.4.
What this calculator is useful for
Estimate body mass index from height and weight using the standard adult BMI formula. It is designed for quick estimates and everyday problem solving. When a calculation affects a contract, tax filing, medical decision or other high-stakes situation, verify the result with the appropriate professional or authoritative source.
Frequently asked questions
What does the BMI Calculator calculate?
Estimate body mass index from height and weight using the standard adult BMI formula.
How does the calculation work?
BMI = weight(lb) ÷ height(in)² × 703.
Is this calculator free?
Yes. ERICH Calculators is free to use and no account is required.