Calculate your ideal sleep times, sleep cycles, and wake-up schedules based on when you want to go to bed or wake up.
Recommended Times:
Copied

About Sleep Cycles

Humans sleep in 90-minute cycles. Waking up at the end of a cycle improves alertness and reduces grogginess.

How It Works

This calculator estimates ideal bedtimes or wake-up times based on your sleep cycles and desired duration. Enter either your wake-up or bed time, and it calculates multiple options.

Advice

Adults generally need 7-9 hours of sleep. Avoid caffeine or screen time before bed to improve sleep quality.

FAQs

Q: Can I rely solely on this calculator?
A: It provides guidance, but listen to your body and adjust accordingly.
Q: Does sleep duration affect health?
A: Yes, chronic short or long sleep can have negative health effects.