Calculator
BMI Calculator
Calculate your Body Mass Index using metric or imperial units. Press Enter to calculate.
About this calculator
Body Mass Index (BMI) is a widely used screening tool that relates your weight to your height to give a quick indication of whether you fall within a healthy weight range. CalcKit's BMI calculator supports both metric inputs (kilograms and centimetres) and imperial inputs (pounds and feet/inches), so you can use whichever unit system you are comfortable with. After calculating, the result is displayed alongside its WHO category — Underweight, Normal weight, Overweight, or Obese — and the plain formula is shown so you understand exactly how BMI is derived. Note that BMI is a population-level screening measure and does not account for muscle mass, bone density, or body composition; always consult a healthcare professional for personalised health advice.