😴
무료 Sleep Cycle Calculator
Find the best time to go to bed or wake up based on 90-minute sleep cycles, so you wake between cycles feeling refreshed instead of groggy.
Runs in your browserNo sign-up, no pop-ups로그인 불필요영원히 무료
Go to bed at
9:45 PM
9 hrs
6 cycles · ideal
Go to bed at
11:15 PM
7.5 hrs
5 cycles · ideal
Go to bed at
12:45 AM
6 hrs
4 cycles
Go to bed at
2:15 AM
4.5 hrs
3 cycles
💡 Sleep happens in ~90-minute cycles. Waking at the end of a cycle (rather than mid-cycle) helps you feel refreshed instead of groggy. Most adults do best with 5–6 cycles (7.5–9 hours), plus ~15 minutes to drift off.
Optimize for your platform
사용 방법
1
입력
텍스트나 데이터를 입력하세요.
2
처리
브라우저에서 즉시 처리됩니다. 서버 없음, 대기 없음.
3
다운로드
결과를 저장하세요. 아무것도 저장되지 않습니다.
왜 저희 도구인가요?
✓Completely free — no hidden costs, ever
✓No account, email, or login required
✓Runs entirely in your browser — no uploads
✓Works on any device — phone, tablet, desktop
✓Open and ad-supported, with no tracking
✓Loads fast, with no installation needed
관련 도구
이 도구가 도움이 되었나요?