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.
The BMI Calculator is a common health appraisal instrument used to figure out whether an individual’s weight is likely to be healthy by applying measurements regarding an individual’s height and body weight. BMI signifies body mass index as the name implies – the index measuring the amount of a person’s body mass and health classification as identified by, insurance companies as well as any person working within the area of wellness such as trainers and even healthcare providers.
BMI can’t differentiate body composition, but it is still a useful screening test for identifying whether someone is classified as underweight, normal weight, overweight, obese, or living with a history of obesity. Typically health professionals use BMI as part of routine physical exams, wellness checks at work, fitness goals, and health screenings.
Get instant results with our BMI Calculator and have fun keeping track of your journey and seeing how your weight ranks on standard BMI measures.
All adults, regardless of gender or exercise routine, will benefit from a BMI Calculator. If you're trying to lose weight, begin working out, or you want to make sure you stay healthy for years to come, understanding your BMI could be a very effective first step.
Although BMI serves as a reliable guide to screen yourself, some of the areas mentioned below are capable of influencing your result as well.
High muscle mass individuals (e.g. athletes or body builders) may have higher BMI's despite having very low levels of body fat.
Alteration of body composition with age: as stated above, body composition alterations independently with age; aged people are more likely to have lower muscle and higher body fat even when BMI stays the same.
Men and women’s bodies burn and store fat in unique ways. Because adult BMI calculations don’t factor gender into their formulas, certain other assessments might still be beneficial.
The health risks associated with a BMI may change across different racial or ethnic groups, some groups have an increased risk of health complications at lower BMIs
Carrying fat in the abdomen could increase your risk for health problems even when you're at a healthy BMI.
BMI does not apply when considering weight gain during pregnancy due to the health support pregnancy weight offers your baby.
As children are still growing and developing, they are given BMI percentiles based on their age and sex rather than a fixed adult BMI category.
As many diseases, meds and hormonal situations contribute to body weight, BMI only forms part of a health exam.
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.