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Birth weight

Authoring team

The average normal birth weight at term is about 3.5 kg.

Definitions include:

  • low birth weight, LBW, less than 2.5 kg
  • very low birth weight, VLBW, between 1.0 and 1.5 kg
  • extremely low birth weight, ELBW, up to 1.0 kg

These terms refer to the weight at birth irrespective of the gestational age.

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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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