Enter your pre-pregnancy height and weight to find the recommended total weight gain range during pregnancy, based on IOM guidelines.
This tool estimates a healthy weight gain range during pregnancy based on your pre-pregnancy BMI and current week of pregnancy, following general guidelines from health organizations. It's intended for general awareness and tracking, not as medical advice.
Recommended total pregnancy weight gain varies based on starting BMI category: underweight individuals are generally advised to gain more, while those in higher BMI categories are advised to gain somewhat less, since these ranges are designed to support both maternal and fetal health.
Enter your pre-pregnancy weight and height (to determine starting BMI category) and your current week of pregnancy, and the calculator shows a general recommended weight gain range for that stage.
Example: A person with a normal pre-pregnancy BMI is generally advised to gain roughly 25 to 35 pounds total over the course of a full-term pregnancy, gained gradually rather than all at once.
Is weight gain the same for every trimester? No, most guidelines suggest minimal weight gain in the first trimester, with the majority of weight gain occurring gradually during the second and third trimesters.
Does pre-pregnancy weight affect the recommended range? Yes, individuals who start pregnancy underweight are generally advised to gain more, while those starting in a higher BMI category are advised to gain somewhat less, following standard clinical guidelines.
Is this calculator a substitute for prenatal care? No, this tool provides general reference information only. Weight gain during pregnancy should be monitored by your doctor or midwife as part of regular prenatal checkups.
Does twin or multiple pregnancy change the recommendations? Yes, pregnancies with twins or multiples typically have higher recommended weight gain ranges, which should be discussed specifically with your healthcare provider.
What if I'm gaining weight faster or slower than the general guideline? Individual variation is normal and expected; always discuss any concerns about your specific weight gain pattern directly with your healthcare provider rather than relying solely on general guidelines.