SnoozeCalc
Menu

Sleep timing, made practical

Plan your sleep in seconds.

Choose when you need to wake up, when you plan to go to bed, or how long you want to nap. SnoozeCalc gives clear estimates without signup or tracking your inputs.

Free sleep planning tool

Sleep Calculator

Enter when you need to wake up and compare estimated bedtimes.

I want to

Use your local time.

Advanced settings

Sleep cycles vary. This setting changes the estimate; it does not measure your sleep.

Useful when the calculation crosses a daylight-saving change.

Transparent assumptionsAdjust sleep latency and estimated cycle length.
Private by designYour times are calculated locally in your browser.
Duration comes firstLonger sleep opportunities appear before shorter estimates.

How the estimates work

A useful planning tool, not a sleep-stage detector.

Sleep includes repeating non-REM and REM phases, but timing varies between people and across the night. SnoozeCalc uses an adjustable cycle estimate and shows the total sleep opportunity behind every result.

Use the full calculator

Compare wake-up, bedtime, and nap modes with advanced settings.

 Check sleep by age

See general daily sleep-duration guidance across life stages.

 Understand sleep timing

Learn how cycles, circadian timing, habits, naps, and schedules fit together.
Persistent sleep problems deserve attention. If you regularly struggle to sleep, wake repeatedly, feel very sleepy during the day, or have symptoms such as loud snoring with pauses in breathing, talk with a qualified healthcare professional.