Sleep time calculator

Struggle with wake-up and bedtime? Our Sleep Time Calculator has you covered.

I have to wake up at...

h
m
AM

I will go to sleep at...

h
m
PM

If you want to go to bed now...

Calculate Wake-Up Time:

Say goodbye to oversleeping and hello to a refreshed morning. Input your wake-up time, and we'll optimize your alarm for a better start to the day.

Calculate Bedtime:

No more bedtime guesswork. Let us help you find the perfect time to hit the hay based on your wake-up schedule.

Reclaim your sleep with our Sleep Time Calculator. Start today and wake up ready for anything!

  • Deep sleep, also known as slow-wave sleep, is crucial for physical restoration and typically occurs in the earlier part of the night.
  • REM (Rapid Eye Movement) sleep, vital for cognitive function and dreaming, tends to dominate the later part of the sleep cycle.
  • Avoiding caffeine and electronic devices before bedtime can contribute to better sleep quality.
  • Consistency in sleep schedule, including weekends, helps regulate the body's internal clock.

How the estimate works

The calculator adds or subtracts 90-minute intervals and allows 15 minutes to fall asleep. It does not measure your sleep or set an alarm. Actual sleep cycles and sleep needs vary.

Read sleep times as planning estimates

A clock based sleep calculator gives a schedule estimate. It does not measure your sleep stages, detect when you fall asleep or guarantee how you will feel at a suggested wake time.

If you want a plan based on your own chosen duration, use the bedtime calculator. It lets you enter sleep hours and the time you allow to fall asleep.

How to use this tool

  1. Choose the bedtime or wake time you want to work from.
  2. Check the AM or PM setting before calculating.
  3. Treat the suggested times as estimates, then set a separate reliable alarm.

Example

A plan for 8 hours of sleep plus 15 minutes to settle needs 8 hours 15 minutes between getting into bed and waking. The time asleep is not measured by this page.

Common questions

Does a suggested time identify the end of my sleep cycle?

No. Sleep stages cannot be identified from a clock input alone. The result is a timing estimate.