The National Sleep Foundation recommends 7–9 hours for adults. 6–10 hours may be appropriate depending on individual variation.
Adults in their late 20s to early 40s need 7–9 hours per night. Deep sleep (N3) begins a slow, gradual decline in this range, which is why you may feel "less recovered" after the same amount of sleep than in your early 20s. Consistency of timing matters more than total hours for most people in this bracket.
Every number on this page assumes you\u2019re an average sleeper. You probably aren\u2019t. Our 2-minute calculator gives you the exact bedtime that matches your cycle length — not the generic 90-minute assumption.
Start the calibration→The National Sleep Foundation recommends 7–9 hours per night for adults. 6–10 hours may be appropriate for individual variation.
7 hours is the floor of the recommended range — sufficient for most adults on a consistent schedule, but below the middle of the NSF range. If you feel tired at this duration, try adding 30 minutes for a week.
Bedtime depends on wake time, not age alone. Most adults need 5 complete sleep cycles (~450 minutes, though personal cycle length varies from 75–115 min). Count backwards from the intended wake time to set a cycle-aligned bedtime.
Adults in their late 20s to early 40s need 7–9 hours per night. Deep sleep (N3) begins a slow, gradual decline in this range, which is why you may feel "less recovered" after the same amount of sleep than in your early 20s. Consistency of timing matters more than total hours for most people in this bracket.
Naps are optional at this age. A 20-minute power nap can be a useful recovery tool, but is not required.