Pregnancy Weight Gain Calculator
NEWCalculate recommended pregnancy weight gain by trimester using IOM 2009 guidelines. Based on pre-pregnancy BMI with twin support and full weight breakdown.
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How to use
- 1Enter: preWeight(kg),height(cm),week (e.g. 65,165,20)
- 2Week: current pregnancy week (1–42)
- 3For twins add: 65,165,20,twins
- 4Get total gain target, weekly rate, and trimester breakdown
Frequently Asked Questions — Pregnancy Weight Gain Calculator
How much weight should I gain during pregnancy?+
IOM 2009 guidelines: 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 add 4–5 kg to each range.
How much weight gain is normal per week during pregnancy?+
1st trimester: 0.5–2 kg total (negligible weekly gain). 2nd trimester: 0.35–0.50 kg/week (normal weight). 3rd trimester: 0.35–0.50 kg/week (normal weight). Overweight women: 0.23–0.33 kg/week.