How much sleep do I actually need?
Most adults need 7 to 9 hours, teens need 8 to 10, and older adults often do well with 7 to 8. Your exact need shifts with recovery demands like training, illness, and stress.
Free Wellness Tool
How Much Sleep Do I Need? Calculator
Free "how much sleep do I need" calculator. Get a personalized sleep-hours range by age group and lifestyle factors with no signup required.
Questions
Why does the recommended range go up when I am stressed or sick?
Recovery from physical training, illness, high stress, and sleep debt increases your sleep need, so the calculator nudges your range toward the higher end.
Is this calculator a medical assessment?
No. It provides general age-based guidance. Persistent sleepiness despite enough hours is worth discussing with a clinician.