Calculators

BMI Calculator

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Your BMI

Underweight <18.5 · Normal 18.5–24.9 · Overweight 25–29.9 · Obese ≥30

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What is the Bmi Calculator?

The BMI Calculator estimates Body Mass Index from height and weight. BMI is a simple screening number used to group weight ranges for adults. It is calculated as weight in kilograms divided by height in meters squared.

For example, a person who weighs 70 kg and is 1.75 m tall has a BMI of 70 divided by 1.75 squared, which is about 22.9. That falls in the common adult "normal weight" range.

BMI is useful as a broad starting point, but it does not measure body fat, muscle mass, age, sex, pregnancy, or medical history. Athletes, older adults, children, and pregnant people may need a different assessment.

How to use the Bmi Calculator

  1. Select metric or imperial units.
  2. Enter your height and weight.
  3. Read the BMI number and the category shown below it.
  4. Use the category as a general screening clue, not a diagnosis.
  5. Speak with a qualified health professional if the result affects a health decision.

Frequently asked questions

BMI equals weight in kilograms divided by height in meters squared. Imperial inputs are converted to metric before the calculation.
No. BMI is a broad screening tool. It can be misleading for very muscular people, children, older adults, and during pregnancy.
No. The calculator gives a general estimate only and should not replace advice from a doctor or qualified health professional.