Health

Pregnancy Weight Gain Calculator

Find recommended pregnancy weight gain by pre-pregnancy BMI.

Calculated Output

BMI category Normal

Recommended gain 11.5–16 kg

Formula: IOM ranges by pre-pregnancy BMI

Step-by-Step Breakdown

1. Values used:

2. Pre-pregnancy BMI = 22 kg/m²

4. BMI category = Normal

5. Recommended gain = 11.5–16 kg

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The math behind it

Underweight: 12.5–18 kg; normal: 11.5–16; overweight: 7–11.5; obese: 5–9 kg (singleton pregnancy).

BMI 22 (normal) → 11.5–16 kg.

Twins?

Recommended gain is higher; ask your provider.