A 3-month-old baby's average weight varies by sex and individual growth patterns, but typical ranges are as follows:
- For boys, the average weight is about 12 lb 14 oz (5.8 kg) to 14 lb 1 oz (6.4 kg)
- For girls, the average weight is about 12 lb (5.4 kg) to 14 lb 1 oz (6.4 kg)
Other sources indicate:
- Boys typically weigh between 12.5 and 14.1 pounds (5.7 to 6.4 kg) at 3 months
- Girls typically weigh between 11.5 and 12.9 pounds (5.2 to 5.8 kg) at 3 months
Weight gain in the first 3 months is usually about an ounce per day, and by 6 months babies often double their birth weight
. It is important to remember that babies grow at different rates, so weight within these ranges is generally healthy. Pediatricians track growth over time to ensure steady development rather than focusing on a single measurement
. In summary, a healthy 3-month-old baby typically weighs between approximately 11.5 to 14 pounds (5.2 to 6.4 kg), with boys tending to be at the higher end of this range.
