Three simple steps
How to use the BMI Calculator
- 01
Choose metric or imperial measurements.
- 02
Enter current body weight and height.
- 03
Review the BMI number and standard adult screening category.
Health calculator
BMI Calculator
Calculate adult body mass index from metric or imperial measurements and see the standard screening range.
Instant calculation Runs in your browser
Adult BMI is a screening measure, not a medical diagnosis.
Body mass index
22.72Within the standard range
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Worked example
72 kg and 178 cm
Calculation72 ÷ 1.78²
ResultBMI 22.7 — within the standard range
The method
How it works
Metric formula
Weight in kilograms is divided by height in metres squared.
Imperial formula
Weight in pounds is multiplied by 703, then divided by total height in inches squared.
Screening only
BMI does not directly measure body fat, fitness, muscle mass or individual health risk.
Helpful answers
Frequently asked questions
What is considered a standard adult BMI range?
Common adult screening guidance places 18.5 to 24.9 in the standard range, but interpretation can vary by person and clinical context.
Can children use this result?
No. Children and teenagers require age- and sex-specific growth charts rather than adult categories.
Is BMI a diagnosis?
No. It is a broad screening measure. A qualified health professional can interpret it alongside other information.