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Unit: cm or m
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Unit: kilograms
Your BMI is: 0.0
Normal Weight

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BMI Calculator

What is BMI?

Body Mass Index (BMI) is a simple measure that uses your height and weight to work out if your weight is healthy. The BMI calculation divides an adult's weight in kilograms by their height in metres squared.

How to Use the BMI Calculator?

Using our BMI Calculator is straightforward:

  1. Enter your height (in centimeters)
  2. Enter your weight (in kilograms)
  3. Click the "Calculate" button

The calculator will instantly show your BMI and indicate which category you fall into: underweight, normal weight, overweight, or obese.

BMI Categories

  • Underweight = less than 18.5
  • Normal weight = 18.5 to 24.9
  • Overweight = 25 to 27.9
  • Obese = 28 or greater

Mathematical Formula

The BMI formula is:

BMI=weight(kg)[height(m)]2BMI = \frac{weight(kg)}{[height(m)]^2}

Example: For a person who weighs 70 kg and is 1.75 meters tall:

BMI=701.752=703.0625=22.86\begin{align*} BMI &= \frac{70}{1.75^2} \\ &= \frac{70}{3.0625} \\ &= 22.86 \end{align*}

This person would be in the normal weight category.

Important Notes

BMI is a useful measurement for most people over 18, but it has some limitations:

  • It may not be accurate for athletes or very muscular people
  • It may not be suitable for pregnant women
  • The healthy BMI range may be different for people from certain ethnic groups
  • It is not applicable to children

Always consult healthcare professionals for a complete assessment of your health status.