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Gratuito 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.

Executa no seu navegadorSem inscrição, sem pop-upsSem login necessárioGratuito para sempre
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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Como funciona

1
Inserir
Insira seu texto ou dados.
2
Processar
Processado instantaneamente no seu navegador. Sem servidor, sem espera.
3
Baixar
Salve seu resultado. Nada é armazenado.

Por que usar o nosso?

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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