Pregnancy Weight Gain Calculator

Estimate recommended pregnancy weight gain ranges based on your pre-pregnancy BMI and current gestational week.

Pregnancy Weight Gain Calculator
Check if your weight gain is on track based on IOM guidelines

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Medical Disclaimer: This calculator provides estimates for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Always consult with a qualified healthcare provider about any questions you may have regarding your pregnancy or medical conditions.

How This Calculator Works

Track your pregnancy weight gain in 3 simple steps.

1

Enter your information

Provide your pre-pregnancy weight, current weight, height, and current week of pregnancy. These inputs are used to calculate your pre-pregnancy BMI and gestational stage.

2

Calculate recommended ranges

The calculator applies established medical guidelines (including IOM recommendations) to estimate healthy total weight gain and expected progress for your specific BMI category.

3

Understand your results

View your recommended weight gain range, how your current weight compares, and what is typically expected at your current stage of pregnancy.

Based on IOM 2009 guidelines, this calculator provides personalized weight gain recommendations for both singleton and twin pregnancies.

How This Calculator Is Built

Evidence-Based Guidelines

Our pregnancy weight gain calculator follows established clinical guidelines, including Institute of Medicine (IOM) recommendations. It uses your pre-pregnancy BMI, current weight, and gestational week to estimate expected weight gain ranges commonly used in prenatal care.

100% Private & Secure

Your information stays confidential. All data entered is processed securely and never shared with third parties. You can use the calculator anonymously, without creating an account.

Clear, Practical Results

See whether your current weight gain is within the recommended range for your stage of pregnancy. Results are presented clearly so you can track progress over time or discuss them with your healthcare provider.