Pregnancy Weight Gain Tracker
Health & FitnessTrack recommended pregnancy gestational weight gain curves across trimesters based on pre-pregnancy BMI and Institute of Medicine (IOM) clinical guidelines for single and twin pregnancies.
Target at week 24 (Total full-term target: 11.5–16 kg)
About this calculator
Gaining a healthy amount of weight during pregnancy supports optimal fetal development and reduces the risk of gestational diabetes, preeclampsia, and delivery complications.
Based on official Institute of Medicine (IOM) clinical guidelines, this calculator computes your recommended total weight gain range and weekly second/third trimester gain targets customized to your pre-pregnancy BMI (underweight, normal, overweight, or obese).
How It Works & Formula
Evaluates pre-pregnancy BMI and assigns IOM target ranges: Normal BMI (18.5-24.9) recommends 25-35 lbs total (1-4.5 lbs in 1st trimester, ~1 lb/week thereafter); Overweight (25-29.9) recommends 15-25 lbs total; Obese (≥30) recommends 11-20 lbs total.
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