Compare calculators

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

Optimal Bedtime Calculator

Work out exactly what time to go to bed so you wake up feeling rested and aligned with full sleep cycles. Perfect for anyone who wants to stop waking up groggy.

Wake Time (24h format) (hour)

Required Sleep Duration (hours)

Time to Fall Asleep (minutes)

Sleep Cycle Preference

Fill in the required fields to see your result.

Sleep

Optimal Nap Timing Calculator

Find your ideal nap window based on when you wake up and when you go to bed. Useful for avoiding grogginess and not disrupting your night sleep.

Morning Wake Up Time (hours (24h format))

Night Bedtime (hours (24h format))

Fill in the required fields to see your result.

Key differences

	Optimal Bedtime Calculator	Optimal Nap Timing Calculator
Category	Sleep	Sleep
Inputs required	4	2
Result	Optimal Bedtime (hour)	Optimal Nap Start Time (hours)
What it does	Work out exactly what time to go to bed so you wake up feeling rested and aligned with full sleep cycles. Perfect for anyone who wants to stop waking up groggy.	Find your ideal nap window based on when you wake up and when you go to bed. Useful for avoiding grogginess and not disrupting your night sleep.