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Ħieles 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-upsEbda login meħtieġĦieles għal dejjem
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.
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Kif Taħdem
1
Daħħal
Daħħal it-test jew id-dejta tiegħek.
2
Proċess
Ipproċessat istantanjament fil-browser tiegħek. L-ebda server, l-ebda stennija.
3
Niżżel
Issejvja r-riżultat tiegħek. Xejn huwa maħżun.
Għaliex nużaw tagħna?
✓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
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