Sleep Calculator — Best Bedtime & Wake Up Time Tool

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Smart Sleep Calculator

Find best bedtimes & wake times — wake up refreshed

Mode I want to wake up at… I will go to bed at…

Time

Calculate

Sleep latency (mins)

Cycle length (mins)

Results — suggested times appear below

Tip: Aim for 4–6 cycles (~6–9 hrs). Adjust latency if you fall asleep slowly.

Runs fully in your browser — no signup