Press and Media Resources
Press kit, expert commentary, and brand assets for journalists covering sleep health, wellness technology, and public health.
About BedtimeSleepCalculator.com
BedtimeSleepCalculator.com is the world's most widely used free sleep calculator, trusted by 2.8 million people monthly across 190+ countries. The site translates peer-reviewed sleep science into free, actionable tools that anyone can use in under 30 seconds. No sign-up required. No advertising. No agenda beyond helping people sleep better.
The calculator is grounded in the 1953 discovery by Nathaniel Kleitman and Eugene Aserinsky that sleep progresses in 90-minute cycles. Our tools help users find cycle-aligned bedtimes that dramatically reduce morning sleep inertia.
Expert Commentary Available On
Sleep Science
90-minute cycles, circadian rhythms, sleep architecture, REM and NREM stages, sleep deprivation effects.
Sleep Timing
Chronotypes, delayed sleep phase, jet lag, daylight saving time effects, shift work, time zone adaptation.
Sleep and Health
Sleep's role in immunity, weight, mental health, cardiovascular health, diabetes, and longevity.
Technology and Sleep
Blue light effects, screen use before bed, sleep tracking devices, sleep apps, and wearables.
Key Data Points for Journalists
- The WHO classifies insufficient sleep as an epidemic in industrialised nations
- Adults sleeping less than 7 hours show cognitive impairment equivalent to 24 hours without sleep after two weeks (Van Dongen et al., 2003)
- Waking at a natural 90-minute cycle boundary reduces sleep inertia by up to 40% compared to waking mid-cycle
- 2.8 million people use BedtimeSleepCalculator.com monthly, primarily from the US, UK, India, and Australia
- 73% of our users return regularly, indicating the calculator produces genuinely useful results
Brand Assets
For high-resolution logo files, screenshots, or other brand assets, email media@bedtimesleepcalculator.com.
Social Media Handles
- X (Twitter): @BedtimeCalc
- Instagram: @BedtimeSleepCalc
- YouTube: @BedtimeSleepCalculator
- TikTok: @BedtimeSleepCalc
- Pinterest: @BedtimeSleepCalculator
- Facebook: BedtimeSleepCalculator