Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Shift Work Sleep Calculator

Calculate when you should go to sleep to get 8 hours of rest before your shift, accounting for commute time. Essential for night-shift and rotating-schedule workers.

Shift Start Time (hours (24h format))

Commute Time (hours)

Fill in the required fields to see your result.

Sleep

Sleep Efficiency Calculator

Calculate your sleep efficiency percentage — the ratio of actual sleep to time spent in bed — adjusted for night wakings and how long it takes you to fall asleep. Use it to assess whether poor sleep quality, not just duration, is the issue.

Total Time in Bed (hours)

Actual Sleep Time (hours)

Time to Fall Asleep (minutes)

Night Awakenings (times)

Fill in the required fields to see your result.

Key differences

	Shift Work Sleep Calculator	Sleep Efficiency Calculator
Category	Sleep	Sleep
Inputs required	2	4
Result	Recommended Sleep Start (hours)	Sleep Efficiency Score (%)
What it does	Calculate when you should go to sleep to get 8 hours of rest before your shift, accounting for commute time. Essential for night-shift and rotating-schedule workers.	Calculate your sleep efficiency percentage — the ratio of actual sleep to time spent in bed — adjusted for night wakings and how long it takes you to fall asleep. Use it to assess whether poor sleep quality, not just duration, is the issue.