BMI Calculator
Calculate Body Mass Index in metric or imperial units, with healthy weight range.
How to use the BMI Calculator
Choose metric or imperial, then enter weight and height. You'll see your BMI category and the healthy weight range for your height.
Formula
BMI = weight (kg) ÷ height (m)²
Worked example
72 kg at 1.75 m gives a BMI of 23.5 — within the healthy range.
Frequently asked questions
Is BMI accurate?
BMI is a quick screening tool. It doesn't distinguish muscle from fat, so athletes and older adults may be misclassified.
What is a healthy BMI?
For most adults, 18.5 to 24.9.
Results are estimates for educational and planning purposes. Always confirm important financial, health or legal decisions with a qualified professional. Last reviewed 2026-09-27.