The Sleep Math Blog
Research breakdowns, calculator deep-dives, and sleep science updates.
Sleep Debt Is Real — Here's the Math
You can survive on 6 hours a night. For a while. Then the bill arrives — and a landmark study proved you will not even notice it happening.
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Caffeine Half-Life: What Drake et al. Actually Found
That afternoon coffee you swore was "early enough"? A landmark study proved it still costs you an hour of sleep — and you will not even feel it happening.
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Why the '8 Hours' Rule Is Wrong
Eight hours isn't a prescription — it's an average. The real number is written into your genes, age, and chronotype. Here is how to find it.
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5 Bedtime Habits That Are Ruining Your Sleep
Struggling to fall asleep or waking up exhausted? These 5 common nighttime habits could be the reason — and the science-backed fixes are simpler than you think.
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- The Science Behind Your Chronotype
- Why You Wake Up Tired (Even After 8 Hours)
- Blue Light and Melatonin: What the Research Actually Shows
- Alcohol and Sleep: What One Drink Actually Does