Newborns typically sleep 12 to 16 hours in a 24-hour period. This can vary, with some newborns sleeping as little as 11 hours or as much as 19 hours. While they may sleep for a long time overall, newborns sleep in short bursts, usually around 20 to 50 minutes long. They also don't distinguish between day and night, so they may sleep at any time of day.
Remember that every baby is different and there is no one-size-fits-all answer to how much sleep your baby needs. If you have any concerns about your newborn's sleep patterns, it's always best to talk to your pediatrician.