How much weight to gain?

Based on IOM guidelines for your BMI

Measurement Units

Pre-Pregnancy Weight (lbs)

Height (ft)

Height (in)

Pre-Pregnancy Weight (kg)

Height (cm)

Current Gestational Week

Number of Babies

Current Weight in lbs (optional, for tracking)

Current Weight in kg (optional, for tracking)

recommended total weight gain

Pre-Pregnancy BMI

Expected Gain at Week --

Remaining Expected Gain

Your Status

Week-by-Week Weight Gain Guide

Week	Expected Low	Expected High	Your Gain

Note: This calculator provides estimates based on IOM 2009 guidelines. Every pregnancy is unique. Consult your healthcare provider for personalized guidance.

Your pregnancy weight plan

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Medical Disclaimer: This tool provides general educational estimates. Always consult your prescribing physician or healthcare provider before making medication changes or interpreting results from population-based models.

Frequently Asked Questions

IOM 2009: Underweight 28-40 lbs, Normal 25-35 lbs, Overweight 15-25 lbs, Obese 11-20 lbs.

Most in 2nd and 3rd trimesters. First trimester: 1-4.5 lbs total.

Increases risk of gestational diabetes, preeclampsia, cesarean delivery, and postpartum weight retention.

Normal weight: 37-54 lbs. Overweight: 31-50 lbs. Obese: 25-42 lbs.

Sources

Methodology

IOM 2009 guidelines by pre-pregnancy BMI category. Weekly rates: underweight 0.51 kg/wk, normal 0.42, overweight 0.28, obese 0.22.

IOM guidelines: underweight 28-40 lbs, normal 25-35 lbs, overweight 15-25 lbs, obese 11-20 lbs. Most gain in 2nd/3rd trimester.

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Trimester weight Twin pregnancy Exercise while pregnant Postpartum loss