Pregnancy Weight Gain Calculator
Calculate recommended weight gain ranges and schedules based on Institute of Medicine (IOM) guidelines with optional progress tracking.
Weight Gain Calculation
Enter your pre-pregnancy details and optional current information for progress tracking
For progress tracking
Week 1-42 for progress tracking
Weight Gain
Enter your pre-pregnancy details to see recommended weight gain ranges.
Understanding Pregnancy Weight Gain
IOM Guidelines
- Based on pre-pregnancy BMI category
- Accounts for maternal and fetal health
- Reduces risk of complications
- Updated in 2009 by Institute of Medicine
Example Calculation
Pre-pregnancy: 130 lbs, 5'5" (BMI 21.6)
Category: Normal weight
Total gain: 25-35 lbs (11.5-16 kg)
1st trimester: 1-4 lbs
2nd/3rd: ~1 lb/week
Important Factors
- Individual variation is normal
- Quality of nutrition matters most
- Regular prenatal care is essential
- Multiple pregnancies need different guidelines
Health Benefits
- Reduces risk of gestational diabetes
- Lowers chance of preterm birth
- Supports healthy fetal development
- Easier postpartum weight loss