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Pregnancy Weight Gain Calculator

Recommended pregnancy weight gain by pre-pregnancy BMI.

Compute the IOM-recommended total and weekly weight gain for a singleton pregnancy from pre-pregnancy BMI and current week.

Priya Venkatesan By Priya Venkatesan
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

IOM ranges (single baby, kg): underweight 12.5–18, normal 11.5–16, overweight 7–11.5, obese 5–9.

In depth

Compute the IOM-recommended total and weekly weight gain for a singleton pregnancy from pre-pregnancy BMI and current week.