Calculate recommended pregnancy weight gain based on your pre-pregnancy BMI. Track your weight gain throughout pregnancy using IOM guidelines.
Current Gain
10.0 lbs
Within recommended range
Your Gain
10.0 lbs
Expected
9.0 lbs
Total Goal
25-35
Shaded area shows recommended weight range throughout pregnancy
| Pre-pregnancy BMI | Total Gain (lbs) | Weekly Rate (2nd/3rd) |
|---|---|---|
| Underweight (<18.5) | 28-40 lbs | 1.0-1.3 lbs |
| Normal (18.5-24.9) | 25-35 lbs | 0.8-1.0 lbs |
| Overweight (25-29.9) | 15-25 lbs | 0.5-0.7 lbs |
| Obese (30+) | 11-20 lbs | 0.4-0.6 lbs |
Baby
7-8 lbs
Placenta
1-2 lbs
Amniotic Fluid
2 lbs
Uterus
2 lbs
Breast Tissue
2 lbs
Blood Volume
4 lbs
Body Fluids
4 lbs
Fat Stores
5-9 lbs
Explore how changes affect your results
Compared to the general population
Your Weight Gain
10.0 lbs
Percentile
5th
Below average - looking good!
Distribution
Low
12.7
Below
20.3
Target
30.3
Above
38.8
High
45.9
Your Ranking
Top 5%
95% are higher
Based on your results
You've gained 10.0 lbs at week 20, which is within the recommended range. Keep up the healthy habits!
Second trimester: Add about 340 extra calories/day. Increase protein and calcium intake.
With a pre-pregnancy BMI of 23.3 (Normal Weight), your total recommended gain is 25-35 lbs.
Recommended pregnancy weight gain depends on pre-pregnancy BMI. Normal BMI: gain 25-35 lbs. Underweight: 28-40 lbs. Overweight: 15-25 lbs. Obese: 11-20 lbs. Most gain occurs in 2nd and 3rd trimesters.
Weight gain depends on your pre-pregnancy BMI. Underweight (BMI <18.5): 28-40 lbs. Normal weight (BMI 18.5-24.9): 25-35 lbs. Overweight (BMI 25-29.9): 15-25 lbs. Obese (BMI 30+): 11-20 lbs. Twin pregnancies require more weight gain.
Most women gain little weight in the first trimester (0-4 lbs). Weight gain picks up in the second trimester with about 1 lb per week. Some women may lose weight early due to morning sickness, which is usually not concerning.
Excess weight gain increases risk of gestational diabetes, high blood pressure, larger baby (making delivery harder), and difficulty losing weight postpartum. It doesn't harm the baby directly but can complicate pregnancy and delivery.
Insufficient weight gain may increase risk of preterm birth and low birth weight baby. Talk to your healthcare provider about calorie-dense, nutritious foods. Some women need help managing nausea to eat adequately.
Baby: 7-8 lbs. Placenta: 1.5 lbs. Amniotic fluid: 2 lbs. Uterus growth: 2 lbs. Breast tissue: 2 lbs. Blood volume: 4 lbs. Body fluids: 4 lbs. Fat stores: 5-9 lbs (for breastfeeding and energy).
Current Gain
10.0 lbs
Within recommended range