Pregnancy Weight Gain Calculator
Track your pregnancy weight gain and get personalized recommendations based on your BMI and pregnancy stage.
Calculate Your Recommended Weight Gain
Based on your pre-pregnancy BMI of 0.0, you should aim to gain between 0.0 kg and 0.0 kg during your entire pregnancy.
First Trimester
Expected gain: 0.0 kg
Second Trimester
Expected gain: 0.0 kg
Third Trimester
Expected gain: 0.0 kg
Understanding Pregnancy Weight Gain
Healthy weight gain during pregnancy is crucial for both maternal and fetal health. The Pregnancy Weight Gain Calculator helps you track and monitor your weight gain based on established medical guidelines from the Institute of Medicine (IOM).
Recommended Weight Gain by Pre-Pregnancy BMI
The recommended weight gain during pregnancy varies based on your pre-pregnancy Body Mass Index (BMI):
Underweight (BMI < 18.5)
- Total weight gain: 12.5-18 kg
- Rate per week: 0.44-0.58 kg
- First trimester: 1-2 kg
- Second & third trimesters: 0.5 kg/week
Normal Weight (BMI 18.5-24.9)
- Total weight gain: 11.5-16 kg
- Rate per week: 0.35-0.5 kg
- First trimester: 1-1.5 kg
- Second & third trimesters: 0.4 kg/week
Overweight (BMI 25-29.9)
- Total weight gain: 7-11.5 kg
- Rate per week: 0.23-0.33 kg
- First trimester: 0.5-1 kg
- Second & third trimesters: 0.3 kg/week
Obese (BMI ≥ 30)
- Total weight gain: 5-9 kg
- Rate per week: 0.17-0.27 kg
- First trimester: 0.5 kg
- Second & third trimesters: 0.2 kg/week
Pattern of Weight Gain During Pregnancy
Typical weight gain patterns during pregnancy:
- First Trimester: 1-2 kg total
- Second and Third Trimesters:
- Underweight: 0.5 kg per week
- Normal Weight: 0.4 kg per week
- Overweight: 0.3 kg per week
- Obese: 0.2 kg per week
Components of Pregnancy Weight Gain
Understanding where the weight gain comes from:
- Baby: 3-3.5 kg
- Placenta: 0.7 kg
- Amniotic Fluid: 0.8 kg
- Uterus: 0.9 kg
- Breast Tissue: 0.9 kg
- Blood Volume: 1.2 kg
- Tissue Fluid: 1.2 kg
- Maternal Fat Stores: 2.7-3.6 kg
Importance of Proper Weight Gain
Maintaining appropriate weight gain during pregnancy is important because:
- Supports proper fetal growth and development
- Reduces risk of pregnancy complications
- Improves outcomes for both mother and baby
- Helps with postpartum weight management
Important Note: This calculator provides general guidelines based on IOM recommendations. Individual weight gain needs may vary. Always consult with your healthcare provider for personalized advice regarding your pregnancy weight gain goals.