Compare calculators

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

Melatonin Timing Calculator

Determine the best time to take melatonin to shift your body clock to a new bedtime. Useful when adjusting sleep schedules, recovering from jet lag, or managing delayed sleep phase.

Desired Bedtime (24h (e.g. 22.5))

Current Bedtime (24h (24 = midnight))

Age (years)

Melatonin Dosage

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

	Melatonin Timing Calculator	Optimal Nap Timing Calculator
Category	Sleep	Sleep
Inputs required	4	2
Result	Take Melatonin This Many Minutes Before Desired Bedtime (minutes)	Optimal Nap Start Time (hours)
What it does	Determine the best time to take melatonin to shift your body clock to a new bedtime. Useful when adjusting sleep schedules, recovering from jet lag, or managing delayed sleep phase.	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.