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Pregnancy Weight Gain Calculator

The Institute of Medicine (IOM) Guidelines for healthy weight gain in pregnancy  may help women avoid pregnancy complications such as gestational diabetes, preeclampsia, and cesarean delivery.

This calculator estimates how much weight you should gain during your pregnancy and provides a printable weight chart for your weight category.

 What was your weight before pregnancy?


How tall are you?

feet  inches

Are you having twins No   Yes

How many weeks pregnant are you now ?

This calculator is for educational purposes only and should not be used as a substitute for the advice of a healthcare provider.


Prenatal Weight Gain Charts


Where Does Pregnancy Weight Gain Go?
Baby 7.5 pounds Breast 2 pounds
Fat and Nutrient Stores 7 pounds Uterus 2 pounds
Retained Water 4 pounds Amniotic Fluid 2 pounds
Increased Blood Volume 3 pounds Placenta 1.5 pounds

Sources:  American College of Obstetricians and Gynecologists
Rasmussen KM ed et al. Weight Gain During Pregnancy: Reexamining the Guidelines Institute of Medicine; National Research Council 2009. p 252, 254

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