Pregnancy Weight Gain Calculator

Pregnancy is a time of incredible change, both physically and emotionally. One of the most significant physical changes is weight gain. Gaining the right amount of weight during pregnancy is crucial for the health of both you and your baby.

Pregnancy Weight Gain Formula Calculation uses your personal Body Mass Index (BMI) before pregnancy to estimate a schedule for your healthy weight gain per week, understand that helps to manage calorie intake over the entire pregnancy period. To calculate your pre-pregnancy BMI, use the formula: pre-pregnancy weight (in kilograms) divided by your height (in meters) squared. To determine your pregnancy weight gain, subtract your pre-pregnancy weight from your current weight. Finally, compare your weight gain to the recommended range for your pre-pregnancy BMI category.

How to Use Our Pregnancy Weight Gain Calculator?

Choose Your Current Pregnancy Week
Input Your Pre-Pregnancy Height and Weight: this information will help us calculate your BMI.
Get Your Personalized Plan: our calculator will provide you with a weekly weight gain goal to keep you on track.

Weight gain recommendations for women pregnant with one baby

You should gain 8-18 kilograms if your pre-pregnancy BMI is less than 18.5 (underweight BMI classification)
You should gain 11-16 kilograms if your pre-pregnancy BMI is between 18.5-24.9 (normal BMI classification)
You should gain 7-11 kilograms if your pre-pregnancy BMI is between 25.0-29.9 (overweight or pre-obesity BMI classification)
You should gain 5-9 kilograms if your pre-pregnancy BMI is between 30.0-39.9 (obesity BMI classification)

Weight gain recommendations for women pregnant with twins

You should gain 17-24 kilograms if your pre-pregnancy BMI is between 18.5-24.9 (normal BMI classification)
You should gain 14-22 kilograms if your pre-pregnancy BMI is between 25.0-29.9 (overweight or pre-obesity BMI classification)
You should gain 11-19 kilograms or 25-42 pounds if your pre-pregnancy BMI is between 30.0-39.9 (obesity BMI classification)

All recommendations are from the Institute of Medicine, with the exception of underweight women with twins. If you're pregnant with triplets or more, talk to your health care provider about your weight gain goals.