90-minute cycle planner

Wake up between sleep cycles.

Choose when you need to wake up—or when you plan to sleep—and get a set of cycle-aligned times.

What time do you want to wake up?

Aim to go to bed at one of these times

Based on 4–6 complete sleep cycles

Why timing can make mornings feel easier

Sleep usually moves through repeating stages, from lighter sleep to deep sleep and REM. A cycle is often estimated at about 90 minutes, so waking near a cycle boundary may feel less jarring than waking in the middle of deep sleep.

Five or six cycles gives most adults 7.5–9 hours of sleep. Four cycles is shown as a shorter option, not a nightly target.

This calculator is a planning estimate, not medical advice. Sleep cycles vary between people and across the night. If sleep problems continue, consider speaking with a healthcare professional.