Editorial Policy
How we write, source, check and correct sleep content, and what this site does not claim.
On this page
How BedtimeSleepCalculator.com writes, sources, checks and corrects its sleep content, including what the site does not claim.
Who writes the content
BedtimeSleepCalculator.com is written and maintained by its editorial team. We are not a medical practice, and the site does not claim that pages are medically reviewed. We explain sleep science in plain language, build calculators that turn it into schedules, and point to the original guidance so you can read it yourself.
What we rely on
- CDC sleep duration guidance by age.
- The American Academy of Sleep Medicine and Sleep Research Society consensus statement for adults.
- The National Sleep Foundation, NHS, Mayo Clinic and Sleep Foundation for explainers.
- Named research papers where we cite a finding, such as Drake and colleagues (2013) on caffeine and Van Dongen and colleagues (2003) on chronic sleep restriction.
When guidance differs between organisations, we show the range. We do not invent statistics, testimonials, reviewers or credentials.
Our writing standards
- Give the direct answer first, then the reasoning.
- Use estimates and ranges, never promises such as guaranteed results.
- Explain limits and when to speak to a doctor.
- Keep numbers consistent between calculators, tables, FAQs and structured data.
- Avoid medical advice, dosing and diagnosis.
Content produced from data
Many pages cover a specific wake up time, bedtime, age or nap length. The tables on these pages are computed by code from the same formulas as the calculators, and the surrounding explanation is written for that topic. We add page specific answers and real questions people ask, instead of repeating the same text on every page. Read more on the methodology page.
Advertising and affiliate links
The site may show advertising and may link to products. Advertising does not change calculator results or the advice on the page. See the affiliate disclosure and privacy policy for details.
Corrections and updates
If you find an error, please tell us through the contact page. We correct confirmed errors, update the last updated date and keep the structure of the page stable. Guidance is reviewed when the CDC, AASM or National Sleep Foundation publish changes.
Frequently asked questions
Is BedtimeSleepCalculator.com medically reviewed?
No. The content is written by the editorial team for general education and is not medical advice. Where medical guidance is involved, we cite the organisation that published it.
Where does the site get its sleep numbers?
Recommended hours come from the CDC, the American Academy of Sleep Medicine and the National Sleep Foundation. Cycle math uses the 90 minute average, described on the methodology page.
How do I report a mistake on a page?
Use the contact page and name the page and the line that looks wrong. Confirmed errors are corrected and the updated date changes.
Is 8 hours too much sleep?
Eight hours sits inside the normal range. If you regularly need 10 or more hours and still feel unrefreshed, mention it to a doctor, because it can be linked with health conditions, medicines or poor quality sleep.
How do I move my bedtime earlier?
Shift it by 15 to 30 minutes every two or three days while keeping the wake time fixed, get bright light after waking and dim lights for an hour before bed.
How many sleep cycles do I need per night?
Most adults do well with 5 cycles (about 7.5 hours) and some need 6 (about 9 hours). Four cycles, about 6 hours, is short for most people and is better used as an occasional fallback than a habit.
Is 6 hours of sleep enough?
For most adults it is below the recommended 7 hours. Some people feel fine for a while, but research on chronic sleep restriction found that performance slips even when people do not feel very sleepy. Treat 6 hours as a short night and plan recovery sleep.
Does a consistent sleep schedule really matter?
Yes. A regular sleep and wake time supports your body clock, which can make it easier to fall asleep and wake up. Large gaps between weekday and weekend times can leave you feeling jet lagged on Monday.