Health
Wake-Up Time Calculator
Calculate ideal wake-up times from your bedtime
FAQs
Why do I feel tired even after 8 hours of sleep?
You might be waking in the middle of a sleep cycle. Waking at cycle boundaries can feel more refreshing than a strict hour target.
Should I use 5 or 6 sleep cycles?
Most adults do well with 5-6 cycles (about 7.5 to 9 hours including fall-asleep time), but individual needs vary.