Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Sleep Hygiene Score Calculator
Scores your overall sleep hygiene on a 0β100 scale by rating bedtime consistency, pre-bed screen time, last caffeine intake, and sleep environment. Use it to identify which habits are undermining your sleep.
Sleep Hygiene Score
75 %
75-90%, like the example's 75%, means most habits are solid with one or two to refine. Raising one remaining 2 or 3 to a 4 lifts you past 90%.
Score averages four habit ratings (each 1-4) scaled to 100, so each habit is worth 25 points; bands mark how many habits are at or near best practice.
Caffeine Sleep Impact Calculator
Calculate how many milligrams of caffeine remain active in your system at bedtime based on when and how much you consumed, using a standard 5-hour half-life. Even moderate residual caffeine at bedtime measurably disrupts sleep architecture, not just sleep onset.
Key differences
| Sleep Hygiene Score Calculator | Caffeine Sleep Impact Calculator | |
|---|---|---|
| Category | Sleep | Sleep |
| Inputs required | 4 | 3 |
| Result | Sleep Hygiene Score (%) | Caffeine Remaining at Bedtime (mg) |
| What it does | Scores your overall sleep hygiene on a 0β100 scale by rating bedtime consistency, pre-bed screen time, last caffeine intake, and sleep environment. Use it to identify which habits are undermining your sleep. | Calculate how many milligrams of caffeine remain active in your system at bedtime based on when and how much you consumed, using a standard 5-hour half-life. Even moderate residual caffeine at bedtime measurably disrupts sleep architecture, not just sleep onset. |