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Pregnancy Weight Gain Calculator

Pregnancy Weight Gain Calculator

Track safe pregnancy weight gain by trimester, based on your pre-pregnancy BMI and IOM 2009 guidelines.

Your Pregnancy Details

Based on the Institute of Medicine (IOM 2009) recommendations.

Height *
cm
Pre-Pregnancy Weight *
kg
Current Weight (optional) *
kg
weeks

Always continue routine care with your obstetrician. This calculator is informational only.

Enter height, pre-pregnancy weight and current week to see your recommended gain range.

Track healthy pregnancy weight gain based on trimester and body metrics. Supports safer prenatal wellness and maternal health monitoring.

How this is calculated

Recommended total gain (IOM 2009): Underweight 12.5–18 kg · Normal 11.5–16 kg · Overweight 7–11.5 kg · Obese 5–9 kg.

First-trimester gain ≈ 2 kg, with linear weekly gain through 2nd and 3rd trimesters.

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Disclaimer

These calculators provide general health and fitness estimates based on the information entered and standard scientific formulas. They are intended for educational and informational purposes only and should not be considered a substitute for professional medical advice, diagnosis, or treatment. Results may vary based on individual health conditions, body composition, lifestyle, medications, and clinical factors. Always consult a qualified healthcare professional or doctor before making significant changes to your diet, exercise routine, medication, or health management plan.