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Pregnancy Weight Gain Calculator

See the recommended weight gain range for your pregnancy, based on your pre-pregnancy BMI.

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Weight Gain

BMI-Based Pregnancy Goal Tracking

About the Pregnancy Weight Gain Calculator

See the recommended weight gain range for your pregnancy, based on your pre-pregnancy BMI.

How to use the Pregnancy Weight Gain Calculator

  1. Enter your Pre-preg Height (cm) and Pre-preg Weight (kg).
  2. Choose Single Baby or Twins and press Calculate.

Formula and method

Ranges follow Institute of Medicine guidelines. For a single baby: underweight 12.5 to 18 kg, healthy weight 11.5 to 16 kg, overweight 7 to 11.5 kg, obese 5 to 9 kg.

Tips

  • Discuss your own target with your doctor or midwife.
  • Most weight is gained in the second and third trimesters.

Frequently asked questions

Is the recommendation the same for everyone?
No. It depends on starting BMI and on whether you are carrying more than one baby.