Pregnancy Weight Gain Calculator
Calculate recommended pregnancy weight gain based on your pre-pregnancy BMI following IOM guidelines.
How to Use the Pregnancy Weight Gain Calculator
Calculate recommended pregnancy weight gain based on your pre-pregnancy BMI following IOM guidelines. Enter your information in the form above and get instant results.
Medical Disclaimer: This tool is for informational purposes only. Always consult your healthcare provider for medical advice.
Frequently Asked Questions
How much weight should I gain during pregnancy?
Per IOM guidelines: Underweight (BMI <18.5): 28–40 lbs. Normal (18.5–24.9): 25–35 lbs. Overweight (25–29.9): 15–25 lbs. Obese (≥30): 11–20 lbs.
When does weight gain accelerate?
Most weight gain occurs in the 2nd and 3rd trimesters. Average gain is about 1–2 lbs in the first trimester, then about 1 lb per week after that.
Where does the weight go?
Baby: 7–8 lbs. Placenta: 1–2 lbs. Amniotic fluid: 2 lbs. Uterus: 2 lbs. Breasts: 2 lbs. Blood & fluid: 8 lbs. Fat stores: 7 lbs.