14 to 15 Hours in a Day is About Right
A baby 6 weeks old begins to keep a more regular sleep schedule. According to WebMD, babies at this age usually need about 14 to 15 hours of sleep a day. They do not sleep through the night because they still need a nighttime feeding or two. However, they do begin to sleep more during the night and less during the day. They can sleep stretches of four to six hours.
Every Baby Is Different
Not all babies sleep the same amount of time or on the same schedule. Babies at 6 weeks can sleep less than 14 hours or more than 15. A baby who is going through a growth spurt may sleep longer. A colicky baby may sleep less.
Although 6-week-old babies generally need 14 to 15 hours of sleep in a day, every baby is different. Parents should consult a doctor if they have any questions or concerns about their baby's sleep habits.