Question: how many hours should a one and half month baby sleep?
Answer: From 2 weeks to 2 months of age, they sleep an average of 15.5-17 hours total, about 8.5-10 hours at night and six to seven hours during the day spread out over three to four naps. During the third month, babies need an average of 15 hours of sleep, 10 at night and five spread out over three daytime naps.