Compare calculators

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

Nap Optimization Calculator

Calculate the ideal nap length and timing to boost alertness or memory without causing sleep inertia or disrupting nighttime sleep. Best used when planning a strategic daytime rest.

Current Time (24h (e.g. 14.5))

Tonight's Bedtime (24h (e.g. 23))

Recent Sleep Debt (hours)

Fill in the required fields to see your result.

Sleep

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.

Key differences

	Nap Optimization Calculator	Shift Work Sleep Calculator
Category	Sleep	Sleep
Inputs required	3	2
Result	Recommended Nap Duration (minutes)	Recommended Sleep Start (hours)
What it does	Calculate the ideal nap length and timing to boost alertness or memory without causing sleep inertia or disrupting nighttime sleep. Best used when planning a strategic daytime rest.	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.