Pregnancy Weight Gain Calculator
IOM guidelines — personalised healthy weight range for you & baby
⚖️ Your Healthy Weight Gain Guide
Your Pre-Pregnancy BMI
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Recommended Total Gain
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IOM Guidelines
Expected Gain by Now (Wk —)
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Remaining Gain to Go
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ℹ️ IOM Guidelines (Institute of Medicine):
Underweight (BMI <18.5): 12.5–18 kg | Normal (18.5–24.9): 11.5–16 kg | Overweight (25–29.9): 7–11.5 kg | Obese (≥30): 5–9 kg | Twins (normal BMI): 17–25 kg
Underweight (BMI <18.5): 12.5–18 kg | Normal (18.5–24.9): 11.5–16 kg | Overweight (25–29.9): 7–11.5 kg | Obese (≥30): 5–9 kg | Twins (normal BMI): 17–25 kg
Weight gain targets are guidelines from the Institute of Medicine (IOM). Individual needs vary. Always follow your obstetrician’s advice.
