Pregnancy Weight Gain Calculator
Track healthy weight gain during pregnancy based on pre-pregnancy BMI and gestational week
Calculate Your Pregnancy Weight Gain
Medical Disclaimer
These recommendations are based on Institute of Medicine guidelines and for educational purposes only. Always consult with your healthcare provider for personalized pregnancy care and weight management advice.
Weight Gain by Trimester
First Trimester
1-4 lbs total (weeks 1-12)
Minimal gain due to morning sickness
Second Trimester
~1 lb per week (weeks 13-28)
Most steady weight gain period
Third Trimester
~0.5 lb per week (weeks 29-40)
Slower gain toward end
BMI-Based Recommendations
Underweight (BMI < 18.5)
28-40 lbs gain recommended
Normal (BMI 18.5-24.9)
25-35 lbs gain recommended
Overweight (BMI 25-29.9)
15-25 lbs gain recommended
Obese (BMI ≥ 30)
11-20 lbs gain recommended
Healthy Weight Gain Tips
Eat nutrient-dense foods, not just more calories
Stay active with pregnancy-safe exercises
Weigh yourself weekly, same time and clothes
Stay hydrated with plenty of water
Take prenatal vitamins as recommended
Understanding Pregnancy Weight Gain
Why Weight Gain Matters
Appropriate weight gain during pregnancy is crucial for both maternal and fetal health. It supports baby's growth and development while preparing your body for breastfeeding.
Components of Weight Gain
- •Baby, placenta, and amniotic fluid (7-8 lbs)
- •Increased blood and fluid volume (6-8 lbs)
- •Breast enlargement (2-3 lbs)
- •Fat stores for breastfeeding (7-9 lbs)
Risks of Inappropriate Gain
Too Much Weight Gain
- • Gestational diabetes
- • High blood pressure
- • Cesarean delivery
- • Large baby (macrosomia)
Too Little Weight Gain
- • Low birth weight baby
- • Preterm birth
- • Developmental delays
- • Breastfeeding difficulties
Twin Pregnancy Considerations
Twin pregnancies require higher weight gain to support the growth of multiple babies. The recommendations are adjusted based on pre-pregnancy BMI but generally range from 25-54 pounds.