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Estimate Your Weekly Weight Gain During Pregnancy

Pre-pregnancy Weight :
Pounds (lb)
Current Pregnancy Week :
Your Height :
Pregnant with Twins :
No   Yes
Current weight :
Pounds (lb)

Pre-pregnancy Weight :
Kilograms (kg)
Current Pregnancy Week :
Your Height :
Pregnant with Twins :
NO Yes
Current weight :
Kilograms (kg)

Pregnancy Weight Gain Calculator

Eat for two was what the elders suggested the pregnant women previously. With various research studies, it is now known that women need not eat for two during their pregnancy. In fact, the changes in the body, and physical and mental strain make you eat more.

This is the time when you cannot continue with your regular fitness regime. You need to exercise but not as strenuously as you were doing before. In this scenario, managing your weight becomes a challenge as you can neither be overweight nor underweight. In order to help you come out of this ordeal, MomJunction has come up with the pregnancy weight calculator. This will help you know the right weight at each stage of your pregnancy, and see if you are somewhere around the requirement.

MomJunction Pregnancy Weight Gain Calculator:

Our calculator provides you with the following information:

  • Your pre-pregnancy BMI, and the category it falls into.

  • The ideal weight gain during your pregnancy period.

  • Your current pregnancy weight, and if you are overweight, underweight, or in the right margin.

In order to get the above details, you need to provide the calculator with:

  • Pre-pregnancy weight

  • Current pregnancy week: (Week 1 – Week 40)

  • Current weight

  • If pregnant with twins

  • Your height

Most Frequently Asked Questions

What BMI Chart Is And Why It Is Important During Pregnancy:

A BMI chart calculates your body mass index (BMI). BMI is your weight divided by the square of your height. The number helps assess whether you are in the right path or need to take any corrective measures. It indicates your body fatness.

BMI of less than 18.5 is normally considered underweight, and more than 25 is overweight. More than 30 is obese.

How Much Weight You Can Gain During Pregnancy:

The amount of weight that you need to gain during pregnancy depends on your weight before conceiving.

The Institute of Medicine (IOM) recommends the following guidelines:

  • Women with an average BMI of 18.5-24.9 before pregnancy need to gain 25-35 pounds (lbs).

  • Those having BMI of less than 18.5 should put on 28-40lbs.

  • Overweight women with more than 25 but less than 30 BMI should look at adding 15-25lbs.

  • Obese women with a BMI of more than 30 need to gain 11-20lbs.

Trimester-wise Pregnancy Weight:

The American Pregnancy Association recommends the below weight gains for each trimester:

  • In the first trimester there is no requirement for you to accumulate any additional weight, as having 4.5lbs more is fine.

  • In the second and third trimesters, the ideal weight gain is 1-2lbs a week.

Weight Gain During Pregnancy With Twins:

Women carrying multiple babies in their womb need to be doubly careful about their diet and weight. Lower weight increases the chances of preterm labor. Also, the babies will be born with low birth weight.

Ideal average weight gain for women with twins is 35 to 45lbs during the entire period of pregnancy. It is 50 to 60lbs for mothers with triplets.

Early weight gain between 20 and 24 weeks helps you avoid preterm babies. It is good to add 24lbs by the 24th week.

Consequences Of Being Overweight Or Underweight:

It is important to strike a balance with your weight gain, as excess weight will complicate your labor and also you might end up carrying the baggage after the baby is born. Low weight will affect the growth of your baby and your health as well.

Measures To Take If You Are Underweight:

A study published in BJOG: An International Journal of Obstetrics and Gynaecology reveals that the chances of miscarriage are 72% higher among underweight women than in normal mothers. The study recommends these measures to overcome the situation:

  • Intake of vitamin supplements during the early weeks of pregnancy reduced the risk of miscarriage by 50%.

  • Daily consumption of fresh fruit and vegetables also cut down the chances by 50% among the underweight women.

  • Interestingly, chocolate had similar effects on them.

Measures To Take If You Are Overweight:

If you are overweight, you can manage it in such a way that the increase is within the permissible limits. Take these steps for a controlled growth:

  • Understand how much you need to gain as you are already overweight.

  • Eat small but frequent meals.

  • Take vitamins, as you need that nutrition for your body.

  • Avoid junk and eat healthy.

  • Exercise regularly.

Weight From Your Previous Pregnancy:

The UK National Institute for Health and Clinical Excellence (NICE) recommends that women need to lose their baby weight from the previous pregnancy before conceiving again. According to the agency, more than 50% of the women in the childbearing age are either overweight or obese.

King's College London director of maternal and fetal research professor Lucilla Poston was once quoted by The Telegraph as saying: “The increasing prevalence of obesity among pregnant women in the UK is very worrying as there are so many potential risks for the mother and her baby. Even modest weight retention after pregnancy is now known to increase the risk of problems in the next pregnancy."

Tips to Control Weight During Pregnancy:

  • Eat fresh fruits and vegetables, breads and cereals.

  • Drink skimmed milk, and eat low-fat dairy products such as yogurt and cheese.

  • Avoid sweetened and added sugar foods and drinks.

  • Drink water instead of opting for an aerated drink to quench your thirst.

  • Avoid junk and fatty foods.

  • Have home-made food and avoid eating out.

  • Exercise moderately after talking to your medical consultant.


Our pregnancy weight calculator provides just an estimation. You need to discuss your weight issues with a medical practitioner before taking any measures. MomJunction is not liable for any related issues, consequences or damages.

Did you try our calculator yet? If yes, how did it help you in managing your weight during pregnancy. Let us know by commenting below.

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