Track healthy weight gain during pregnancy based on your pre-pregnancy BMI and get personalized recommendations
Calculate Weight Gain
Your Pre-pregnancy BMI
Recommended Weight Gain
Trimester Breakdown
About the Pregnancy Weight Gain Calculator
Our pregnancy weight gain calculator helps expectant mothers track healthy weight gain throughout pregnancy based on pre-pregnancy BMI and medical guidelines from the Institute of Medicine (IOM) and American College of Obstetricians and Gynecologists (ACOG).
How to Use This Calculator
Enter your pre-pregnancy weight - This is your weight before conception
Input your height - Choose between feet/inches or centimeters
Specify current week of pregnancy - Enter your current gestational week
Add current weight (optional) - To track your progress
Select pregnancy type - Single baby, twins, or multiples
Click "Calculate Weight Gain" - Get personalized recommendations
Understanding Your Results
Pre-pregnancy BMI: Categorizes your weight status before pregnancy
Total Recommended Gain: Evidence-based weight gain range for your entire pregnancy
Weekly Gain: Recommended weekly weight gain for second and third trimesters
Current Progress: How your current weight gain compares to recommendations
Weight Gain Guidelines by BMI
Underweight (BMI < 18.5): 28-40 lbs total gain
Normal weight (BMI 18.5-24.9): 25-35 lbs total gain
Overweight (BMI 25.0-29.9): 15-25 lbs total gain
Obese (BMI ≥ 30.0): 11-20 lbs total gain
Important Note
This calculator provides general guidelines based on medical recommendations. Always consult with your healthcare provider for personalized advice about weight gain during pregnancy, especially if you have specific health conditions or concerns.