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Pregnancy Weight Gain Calculator

Find your recommended pregnancy weight gain range based on pre-pregnancy BMI.

How this is calculated
IOM guidelines by pre-pregnancy BMI category, applied as a weekly rate from week 13 onward

Assumptions used in this calculation

  • IOM guidelines: Based on singleton pregnancies; twin/multiple pregnancies have different guidelines not covered here.

About this calculator

The pregnancy weight gain calculator finds your recommended total weight gain range using Institute of Medicine (IOM) guidelines based on pre-pregnancy BMI, plus your expected gain-to-date at your current week.

Worked example

165 cm, 65 kg pre-pregnancy, week 30

Result: Recommended total gain: 11.5-16 kg

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