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Sleep Calculators

Wake-Up Time Calculator

If you go to bed now (or at a set time), the best times to wake up at the end of a sleep cycle.

Enter values

Results update as you type.

Result

Best wake-up times

06:45 or 08:15

4 cycles (6.0 h)
05:15
5 cycles (7.5 h)
06:45
6 cycles (9.0 h)
08:15

About the Wake-Up Time Calculator

If you go to bed now (or at a set time), the best times to wake up at the end of a sleep cycle.

Also known as: when should i wake up, best wake up time, alarm calculator.

How to use this calculator

  1. Enter going to bed at, time to fall asleep.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

Wake = bedtime + latency + cycles × 90 min

Worked example

Using the values pre-filled in the calculator above:

  • Going to bed at: 23:00
  • Time to fall asleep = 15 min

the calculator returns:

  • Best wake-up times: 06:45 or 08:15
  • 4 cycles (6.0 h): 05:15
  • 5 cycles (7.5 h): 06:45
  • 6 cycles (9.0 h): 08:15