Pregnancy Weight Gain Calculator
Calculate recommended weight gain during pregnancy based on pre-pregnancy BMI
About this calculator
The Pregnancy Weight Gain Calculator helps expectant mothers determine healthy weight gain targets throughout pregnancy based on their pre-pregnancy BMI. This tool follows Institute of Medicine guidelines to provide personalized recommendations that support both maternal and fetal health. Proper weight gain during pregnancy reduces risks of complications like gestational diabetes, preterm birth, and delivery complications while ensuring adequate nutrition for baby's development. Healthcare providers use these evidence-based ranges to monitor pregnancy progress and adjust dietary recommendations accordingly.
How to use
Enter your pre-pregnancy weight and height to calculate your BMI automatically. The calculator will then display your recommended total weight gain range for the entire pregnancy based on established medical guidelines. You can track your progress by comparing your current weight gain to these personalized targets throughout each trimester.
Frequently asked questions
What if I was underweight before pregnancy?
Underweight women (BMI <18.5) should gain 28-40 pounds during pregnancy to support healthy fetal development and maternal health.
How much weight should I gain each trimester?
Most weight gain occurs in second and third trimesters, averaging 1-2 pounds per week after minimal first trimester gain.
What happens if I gain too much weight?
Excessive weight gain increases risks of gestational diabetes, high blood pressure, cesarean delivery, and postpartum weight retention complications.