Pregnancy Weight Gain Calculator

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How much weight should I gain during pregnancy?

The amount of pregnancy weight you're recommended to gain depends on where you started out: underweight, at a healthy weight, overweight, or obese (and whether you’re carrying twins or multiples).

This tool will calculate your pre-pregnancy BMI (body mass index), give you a recommendation for pregnancy weight gain, and generate a pregnancy weight gain chart to show how you're tracking toward your target weight range.

But keep in mind that your recommended weight gain may be different depending on your health needs and any pregnancy complications. Especially if you're overweight, obese, or underweight, it's important to talk to your doctor or midwife and use pregnancy weight gain information that's customized for you.

IMPORTANT: The Pregnancy Weight Gain Calculator is a general educational aid only and should not be relied on as a substitute for the monitoring of your weight by your doctor, midwife, or other healthcare providers.


BabyCenter's editorial team is committed to providing the most helpful and trustworthy pregnancy and parenting information in the world. When creating and updating content, we rely on credible sources: respected health organizations, professional groups of doctors and other experts, and published studies in peer-reviewed journals. We believe you should always know the source of the information you're seeing. Learn more about our editorial and medical review policies.

IOM. 2009. Weight Gain During Pregnancy: Reexamining the Guidelines. Institute of Medicine and National Research Council. a new window [Accessed May 2022]

ACOG. 2020. Weight gain during pregnancy. American College of Obstetricians and Gynecologists. a new window [Accessed May 2022]

CDC. 2021. Weight gain during pregnancy. Centers for Disease Control and Prevention. a new window [Accessed May 2022]

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