Pregnancy Weight Gain Calculator

The Pregnancy Weight Gain Calculator helps estimate a healthy weight gain schedule during pregnancy based on guidelines from the Institute of Medicine.

Adjust the values below to calculate your recommended weight gain goals.

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Input Details:

Measurement Units:

US Units
Metric Units

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1. Current Pregnancy Stage:

Enter Week of Pregnancy:

Are you pregnant with twins?

Yes
No

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2. Height:

Feet:
Inches:

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3. Weight Before Pregnancy:

Pre-Pregnancy Weight:

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4. Current Weight:

Enter Current Weight:

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Calculate

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Recommended Weight Gain During Pregnancy

Pregnancy involves natural and necessary weight gain to support fetal development and prepare for breastfeeding. The Institute of Medicine provides guidelines based on pre-pregnancy Body Mass Index (BMI):

• Underweight (BMI < 18.5): 28–40 lbs
• Normal Weight (BMI 18.5–24.9): 25–35 lbs
• Overweight (BMI 25–29.9): 15–25 lbs
• Obese (BMI > 30): 11–20 lbs

For pregnancies with twins, the recommendations differ.

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Understanding Weight Gain Distribution

Pregnancy weight gain is not just the baby’s weight but includes other critical components like:

• Enlarged breasts: 1–3 lbs
• Placenta: 1.5 lbs
• Increased blood volume: 3–4 lbs
• Fat stores: 6–8 lbs

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Tips for Healthy Pregnancy Weight Gain

1. Nutrition:
   • Focus on nutrient-dense foods like leafy greens, lean proteins, and healthy fats.
   • Include essential nutrients like folate, calcium, and iron.
2. Exercise:
   • Regular, moderate physical activity is often safe and beneficial during pregnancy.
3. Consultation:
   • Speak with a healthcare provider for personalized recommendations.

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Note: Every pregnancy is unique. Always consult a medical professional for guidance tailored to your needs.