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Bure 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-upsHakuna kuingia kinachohitajikaBure milele
Go to bed at
9:45 PM
9 hrs
6 cycles Β· ideal
Go to bed at
11:15 PM
7.5 hrs
5 cycles Β· ideal
Go to bed at
12:45 AM
6 hrs
4 cycles
Go to bed at
2:15 AM
4.5 hrs
3 cycles

πŸ’‘ 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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Jinsi Inavyofanya Kazi

1
Ingiza
Ingiza maandishi au data yako.
2
Chakata
Inachakatwa papo hapo katika kivinjari chako. Hakuna seva, hakuna kusubiri.
3
Pakua
Hifadhi matokeo yako. Hakuna kinachohifadhiwa.

Kwa nini utumie yetu?

βœ“Completely free β€” no hidden costs, ever
βœ“No account, email, or login required
βœ“Runs entirely in your browser β€” no uploads
βœ“Works on any device β€” phone, tablet, desktop
βœ“Open and ad-supported, with no tracking
βœ“Loads fast, with no installation needed

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