The BMI Calculator (Body Mass Index Calculator) is a useful tool of establishing whether your weight is within a healthy range. Use our tool to calculate your pre-pregnancy BMI:

BMI Calculator

Our BMI Calculator will give you a starting point for recommended weight gain. Women in the average BMI range should gain somewhere between 11 – 16 kilograms during pregnancy, while women with a lower BMI should gain more, and women with a higher BMI should gain less. Here are some reference points:

Underweight (BMI Less than 18.5) : Recommended weight gain of 12 – 18 kilograms.
Normal (BMI between 18.5 to 24.9): Recommended weight gain of 11- 16 kilograms.
Overweight( BMI between 25.0 to 29.9) : Recommended weight gain of 6.5 – 11.5 kilograms
Obese (BMI of 30 or greater) : Recommended weight gain should be less than 6.8 kilograms

Why is it important to calculate your BMI?

Being too thin (a body mass index of less than 18.5) or overweight (a BMI of 25 or more) can affect your fertility and your baby’s health. In addition, being obese (BMI > 30)  will lead to pregnant women suffering from gestational diabetes, a condition leading to increased blood sugar levels during pregnancy.

Women who develop gestational diabetes are at higher risk of developing Type 2 Diabetes post pregnancy. If gestational diabetes is not managed carefully, it can result in high levels of glucose which may create several problems for both you and your baby. Problems may include a C-section delivery, jaundice, low blood sugar (hypoglycemia), pre-term birth, high blood pressure as well as respiratory problems.

For most women, pregnancy weight gain is  natural. However, a less common problem isn’t gaining too much weight; it’s gaining too little or, at times even losing weight. This can lead to serious health complications. In fact, babies born to mothers with a low BMI of 20 are more likely to be born prematurely and small for their birth weight.

It is important to calculate your BMI and understand how much weight you can gain during pregnancy. You can also refer to the BMI Chart below to find out your BMI.

BMI chart

The BMI calculator is a general educational tool and should not replace advice from your doctor and/or nutritionist during your antenatal appointments.

Pregnancy Calculators

Due Date Calculator

Are you counting weeks, months and trimesters? Use our Due Date Calculator to find out your due date or your baby’s expected birthday!

Ovulation Calculator - Fertility Calculator

Find out when you’re most fertile and when is the best time to get pregnant with our Ovulation calculator.

Pregnancy Weight Gain Calculator

The Pregnancy Weight Gain Calculator will recommend the ideal weight range for your pregnancy based on your pre-pregnancy height and weight.

Weeks Into Months Pregnancy Calculator

Find out how many months into your pregnancy you are with the Weeks into Months Pregnancy Calculator which converts your weeks of pregnancy into Months.

BMI Calculator for Pregnancy was last modified: January 29th, 2017 by Anjali Sharma