Free Tool
Pregnancy weight tracker
Enter your height and pre-pregnancy weight to see your recommended gain range. Track where you are this week with a personalized chart.
Your measurements
Disclaimer: These recommendations are based on the IOM (Institute of Medicine) guidelines for singleton pregnancies. Every pregnancy is different. Your provider may recommend a different weight gain target based on your medical history, activity level, or whether you are carrying multiples. This tool is for informational purposes only.
How much weight should you gain?
The Institute of Medicine (IOM) sets recommended ranges based on your pre-pregnancy BMI. These numbers account for baby, placenta, amniotic fluid, increased blood volume, breast tissue growth, and the fat stores your body needs for delivery and breastfeeding.
Most weight gain happens after the first trimester. During weeks 1 to 13, many people gain only 1 to 5 pounds (and some lose weight due to nausea). From weeks 14 onward, gaining about half a pound to one pound per week is typical.
These are guidelines, not rules. Some variation is completely normal. Your provider may recommend a different target based on your health history, whether you are carrying multiples, or other factors. What matters most is consistent, gradual gain rather than hitting an exact number.
Where the weight goes
Baby and support
- Baby: 7 to 8 lbs
- Placenta: 1 to 2 lbs
- Amniotic fluid: 2 lbs
- Uterus: 2 lbs
Your body
- Blood volume: 3 to 4 lbs
- Breast tissue: 1 to 3 lbs
- Fat stores: 6 to 8 lbs
- Extra fluid: 2 to 3 lbs