Inputs and units
Enter height in centimeters and weight in kilograms. If your measurements use feet, inches, or pounds, convert them carefully before using this version of the calculator. Using measurements taken at different times can make the result less useful for comparison.
The equation
BMI = weight (kg) ÷ height (m)2
Verified example
A height of 175 cm is 1.75 m. With a weight of 70 kg, the calculation is 70 ÷ (1.75 × 1.75) = 22.857…, which the tool displays as 22.9.
How this tool labels the result
The calculator labels values below 18.5 as “Below range,” 18.5 to below 25 as “Healthy range,” 25 to below 30 as “Above range,” and 30 or higher as “High range.” These labels describe the tool’s built-in ranges; they are not a diagnosis.
Important limits
BMI is a screening measure based only on height and weight. It does not measure body composition, fitness, pregnancy status, age-related changes, medical history, or individual health risk. Do not use it to diagnose a condition or replace advice from a qualified health professional. If a result concerns you, discuss it with an appropriate clinician.