Sleep Duration Calculator

How to calculate sleep duration?

Sleep duration is the total elapsed time between falling asleep and waking up, accounting for the transition past midnight.

Formula: Duration = (Wake Time - Sleep Time + 24) mod 24

Using the Sleep Duration calculator: an example

Example: You go to bed at 10:30 PM and wake up at 6:45 AM.

Step-by-step calculation:

1. Convert times to 24-hour format (22:30 and 06:45)
2. Calculate the difference across midnight
3. Convert the decimal result into hours and minutes

Frequently Asked Questions

What is the recommended sleep duration?

Most adults require between 7 to 9 hours of quality sleep per night for optimal health.

Does this include time spent awake at night?

No, this calculates total time in bed. To find actual sleep, subtract any time you spent awake after initially falling asleep.

Why is consistent sleep duration important?

Maintaining a regular sleep schedule helps regulate your circadian rhythm, improving sleep quality and daytime alertness.