Each is a pure calculation behind a 2-3 input form, with a transparent methodology and a named clinician reviewer. No sign-up, no paywall — answer in seconds.
Try it now — no click-through
Pick your wake-up time. We'll show the bedtimes that land you at a sleep-cycle boundary — so you wake up sharp, not mid-cycle and groggy.
I need to wake up at
Go to bed at one of these
More cycles = more rest — pick whichever fits your schedule. The 15 minutes it takes to fall asleep is already built in.
Timing, stimulants, recovery — reviewed by Dr. Logan Foley, CSSC.
When should I go to bed?
Open toolWhen's my last coffee?
Open toolHow much sleep have I lost?
Open toolHow much melatonin, and when?
Open toolHow long should I nap?
Open toolHow do I beat jet lag?
Open toolHow good is my sleep, really?
Open toolWhich sound helps me sleep?
Open toolNaps, wake windows and schedules — reviewed by Marie Hansen, PSC.
Try it now — no click-through
Tap your baby's age for the awake window, naps a day, and a typical bedtime — straight from our clinician-reviewed wake-windows data.
My baby is
A guide, not a rule — real babies vary ±15 min, and sleep cues (yawns, glassy stare) beat the clock.
Open the full wake windows tool