Pregnancy Weight Gain Calculator
Track your recommended weight gain during pregnancy based on your pre-pregnancy BMI.
Expert Tip
Focus on nutrient quality rather than just calorie quantity. A steady gain supports a healthy birth weight.
Healthy Pregnancy Weight Gain
Weight gain during pregnancy is a natural and necessary part of supporting your growing baby. The amount of weight you should gain depends on your body mass index (BMI) before pregnancy. Tracking your gain helps ensure a healthy environment for both you and your baby.
Where Does the Weight Go?
Pregnancy weight gain isn't just fat. It's also the baby, placenta, amniotic fluid, increased blood volume, breast tissue, and uterine growth. Your body is undergoing incredible changes to support a new life.
Steady Progress
The rate of gain varies by trimester. Tracking ensures a balanced pace that supports fetal development without unnecessary maternal strain.
Gain Guidelines
BMI = Weight(kg) / Height(m)²The Institute of Medicine (IOM) provides weight gain ranges based on your pre-pregnancy BMI category. Women with a lower BMI are generally encouraged to gain more, while those with a higher BMI have a more targeted range.
Guideline Examples
Normal BMI
A woman with a BMI between 18.5 and 24.9 is typically advised to gain 11.5–16 kg (25–35 lbs).
Twin Pregnancy
Expectant mothers of twins naturally have higher recommended gain ranges, often between 17–24.5 kg.