Calculate your Body Mass Index and understand your health category.
For adults, a BMI from 18.5 to 24.9 is generally classified as the normal range.
Important: Adult BMI is a screening estimate, not a diagnosis. It does not directly measure body fat or account for pregnancy, muscle mass, medical history, ethnicity-specific risk thresholds or growth patterns in children and teenagers.
BMI = Weight (kg) ÷ Height² (m²)The estimate uses the requested body measurements and the equation identified in the formula section. Measurement technique, body composition, age, sex selection, hydration, pregnancy and medical conditions can affect interpretation.
BMI Calculator applies a measurement-based health or body-composition equation to the values entered. Calculate your Body Mass Index and understand your health category. The result is a screening reference and does not describe every individual health factor.
It is an estimate generated from the values entered on this page and the calculation method shown in the formula and methodology sections.
The calculator validates the entered values, applies the protected formula shown on the page and then rounds only the displayed result where appropriate.
Use current source values, confirm units and time periods, include every requested cost or measurement, and avoid rounding inputs before the final calculation.
Different calculators may use different assumptions, time periods, rounding rules, reference standards or included costs. Compare the inputs and limitations before comparing answers.
No. It is an educational estimate and cannot account for every medical history, medication, measurement issue or individual biological factor.
Recalculate whenever a material input changes, such as a rate, price, balance, measurement, time period, fee, contribution or project dimension.
Measure under consistent conditions, calculate the result and record the date and method. Compare trends only when the same units and measurement technique are used each time.