Body Mass Index Calculator

Having a normal weight before pregnancy will help play a role in a healthy pregnancy.  Using the body mass index (BMI) can help you figure out if you have a normal or healthy weight.  BMI measures your weight relative to your height.

BMI can help you and your health care provider figure out how much weight you should gain during your pregnancy.  You should not use the BMI calculator if you are already pregnant or under the age of 18.  If you are already pregnant, you can enter an estimate of your weight before you became pregnant to help figure out your pre-pregnancy BMI. To figure out your BMI, use the calculator below.

What is my Body Mass Index (BMI)?

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Research studies in large groups of people have shown that the BMI can be classified into four ranges linked with health risk. The four BMI ranges in the Canadian weight classification system are as follows:

  • underweight (BMI less than 18.5),
  • normal weight (BMIs 18.5 to 24.9),
  • overweight (BMIs 25 to 29.9), and
  • obese (BMI 30 and over).
Talk with your health care provider about your BMI or to find out what a healthy weight gain in pregnancy is according to your BMI, click here