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

Caffeine Sleep Impact Calculator

Estimate how much caffeine remains active in your body at bedtime based on when you last consumed it and your personal sensitivity. Use it to decide your caffeine cutoff time so it doesn't wreck your sleep.

Caffeine Consumed (mg)

Time of Consumption (24h (e.g. 14.5))

Planned Bedtime (24h (e.g. 23))

Caffeine Sensitivity

Fill in the required fields to see your result.

Sleep

Sleep Quality Score Calculator

Score your nightly sleep quality using duration, efficiency, and wake-ups. Use it after any night to spot patterns and improve your rest over time.

Sleep Duration (hours)

Sleep Efficiency (%)

Night Wakings (times)

Fill in the required fields to see your result.

Key differences

	Caffeine Sleep Impact Calculator	Sleep Quality Score Calculator
Category	Sleep	Sleep
Inputs required	4	3
Result	Caffeine in System at Bedtime (mg)	Sleep Quality Score (/100)
What it does	Estimate how much caffeine remains active in your body at bedtime based on when you last consumed it and your personal sensitivity. Use it to decide your caffeine cutoff time so it doesn't wreck your sleep.	Score your nightly sleep quality using duration, efficiency, and wake-ups. Use it after any night to spot patterns and improve your rest over time.