Enter your pre-pregnancy height and weight to find the recommended total weight gain range during pregnancy, based on IOM guidelines.
This tool estimates the recommended total weight gain during pregnancy based on your pre-pregnancy Body Mass Index, following Institute of Medicine (IOM) guidelines.
Pre-pregnancy BMI is calculated first, then a recommended range is applied: underweight 12.5-18 kg, normal weight 11.5-16 kg, overweight 7-11.5 kg, and obese 5-9 kg total gain.
Enter your height and pre-pregnancy weight. Optionally add your current week to see an estimated proportional weight gain so far.
Example: A person with a normal pre-pregnancy BMI is generally advised to gain between 11.5 and 16 kg over the full pregnancy.
Is this medical advice. No, always consult your doctor or midwife, since individual needs vary, especially with twins or health conditions.
Does weight gain happen evenly. No, most gain happens in the second and third trimesters, with minimal gain in the first trimester.