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How much weight should I gain in pregnancy?

The weight you should aim to gain depends on what your weight was before you became pregnant. Body Mass Index (BMI) is the number used to calculate your recommended weight gain.

  1. My pregnancy weight in kilograms
  2. My height in metres, e.g. 165cm = 1.65m
  3. BMI = weight/(height x height), i.e. kg/m2
If your pre-pregnancy BMI wasYou should gain
< 18.5kg/m212.5–18kg
18.5–24.9 kg/m211.5–16kg
25–29.9 kg/m27–11.5kg
30–35 kg/m25–9kg
>35 kg/m2≤ 5kg