🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 129 (from laksa053)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa129.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.nhlbi.nih.gov/health/sleep/how-much-sleep\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.nhlbi.nih.gov/health/sleep/how-much-sleep\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.nhlbi.nih.gov\/health\/sleep\/how-much-sleep","crawl_time":1772347105,"first_indexed_time":1649346110,"http_code":200,"src_unparsed":"gov,nih!nhlbi,www,\/health\/sleep\/how-much-sleep s443","src_root_hash":"7295144728021232729","history_drop_reason":null,"meta_title":"How Sleep Works - How Much Sleep Is Enough? | NHLBI, NIH","meta_descriptions":["Learn about how sleep works, and how many hours of sleep to get each night--no matter what your age."],"attrs_boilerpipe_text":"Experts recommend that adults sleep between 7 and 9 hours a night.\nAdults who sleep less than 7 hours a night may have more health issues than those who sleep 7 or more hours a night. Sleeping more than 9 hours a night is not necessarily harmful and may be helpful for young adults, people who are recovering from sleep deprivation, and people who are sick.\nHow much sleep children should get depends on their age. Sleep experts consider naps to be appropriate for children under age 7.\nRecommended hours of sleep\nBelow you can find the recommended hours of sleep, including naps, for different ages.\nFor newborns younger than 4 months, sleep patterns vary widely.\nBabies 4 months to 1 year old should sleep 12 to 16 hours per day.\nChildren 1 to 2 years old should sleep 11 to 14 hours per day.\nChildren 3 to 5 years old should sleep 10 to 13 hours per day.\nChildren 6 to 12 years old should sleep 9 to 12 hours per day.\nTeens 13 to 18 years old should sleep 8 to 10 hours per day.\nTalk to your doctor or your child’s doctor if you think you or your child is sleeping too much or too little.","attrs_markdown":"[Skip to main content](https:\/\/www.nhlbi.nih.gov\/health\/sleep\/how-much-sleep#main-content)\n\n![U.S. flag](https:\/\/www.nhlbi.nih.gov\/themes\/custom\/nhlbi\/assets\/uswds\/dist\/img\/us_flag_small.png)\n\nAn official website of the United States government\n\nHere’s how you know\n\nHere’s how you know\n\n![](https:\/\/www.nhlbi.nih.gov\/themes\/custom\/nhlbi\/assets\/uswds\/dist\/img\/icon-dot-gov.svg)\n\n**Official websites use .gov**  \n A **.gov** website belongs to an official government organization in the United States.\n\n![](https:\/\/www.nhlbi.nih.gov\/themes\/custom\/nhlbi\/assets\/uswds\/dist\/img\/icon-https.svg)\n\n**Secure .gov websites use HTTPS**  \n A **lock** ( A locked padlock) or **https:\/\/** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.\n\n[![National Heart, Lung, and Blood Home](https:\/\/www.nhlbi.nih.gov\/themes\/custom\/nhlbi\/images\/NHLBI-logo.svg)](https:\/\/www.nhlbi.nih.gov\/)\n\n- Health Topics\n  - [All Health Topics A-Z](https:\/\/www.nhlbi.nih.gov\/health)\n    - [Asthma](https:\/\/www.nhlbi.nih.gov\/health\/asthma)\n    - [Heart-Healthy Living](https:\/\/www.nhlbi.nih.gov\/health\/heart-healthy-living)\n    - [High Blood Pressure](https:\/\/www.nhlbi.nih.gov\/health\/high-blood-pressure)\n    - [Sickle Cell Disease](https:\/\/www.nhlbi.nih.gov\/health\/sickle-cell-disease)\n    - [Sleep Apnea](https:\/\/www.nhlbi.nih.gov\/health\/sleep-apnea)\n  - [Calculate Your BMI](https:\/\/www.nhlbi.nih.gov\/calculate-your-bmi)\n- Health Education\n  - [Education Programs and Initiatives](https:\/\/www.nhlbi.nih.gov\/education)\n    - [The Heart Truth®](https:\/\/www.nhlbi.nih.gov\/health-topics\/education-and-awareness\/heart-truth)\n    - [Learn More Breathe Better®](https:\/\/www.nhlbi.nih.gov\/BreatheBetter)\n    - [Blood Diseases & Disorders Education Program](https:\/\/www.nhlbi.nih.gov\/education\/blood)\n  - [Publications and Resources](https:\/\/www.nhlbi.nih.gov\/resources?language%5BEnglish%5D=English)\n- Research\n  - [Clinical Trials and Studies](https:\/\/www.nhlbi.nih.gov\/research\/clinical-trials)\n  - [Research Focus Areas](https:\/\/www.nhlbi.nih.gov\/science)\n    - [Blood Disorders and Blood Safety](https:\/\/www.nhlbi.nih.gov\/science\/blood-disorders-and-blood-safety)\n    - [Sleep Science and Sleep Disorders](https:\/\/www.nhlbi.nih.gov\/science\/sleep-science-and-sleep-disorders)\n    - [Lung Diseases](https:\/\/www.nhlbi.nih.gov\/science\/lung-diseases)\n    - [Health Disparities](https:\/\/www.nhlbi.nih.gov\/science\/health-disparities)\n    - [Heart and Vascular Diseases](https:\/\/www.nhlbi.nih.gov\/science\/heart-and-vascular-diseases)\n    - [Precision Medicine Activities](https:\/\/www.nhlbi.nih.gov\/science\/precision-medicine-activities)\n    - [Obesity, Nutrition, and Physical Activity](https:\/\/www.nhlbi.nih.gov\/science\/obesity-nutrition-and-physical-activity)\n    - [Population and Epidemiology Studies](https:\/\/www.nhlbi.nih.gov\/science\/population-and-epidemiology-studies)\n    - [Women’s Health](https:\/\/www.nhlbi.nih.gov\/science\/womens-health)\n  - [Research Topics](https:\/\/www.nhlbi.nih.gov\/research\/research-topics)\n  - [All Science A-Z](https:\/\/www.nhlbi.nih.gov\/science\/all-science)\n- Grants and Training\n  - [Grants and Training Home](https:\/\/www.nhlbi.nih.gov\/grants-and-training)\n  - [Policies and Guidelines](https:\/\/www.nhlbi.nih.gov\/grants-and-training\/policies-procedures-and-guidelines)\n  - [Funding Opportunities and Contacts](https:\/\/www.nhlbi.nih.gov\/grants-and-training\/funding-opportunities-and-contacts)\n  - [Training and Career Development](https:\/\/www.nhlbi.nih.gov\/grants-and-training\/training-and-career-development)\n- News and Events\n  - [News and Events Home](https:\/\/www.nhlbi.nih.gov\/news-and-events)\n    - [Email Alerts](https:\/\/www.nhlbi.nih.gov\/news-and-events\/email-alerts)\n  - [All News](https:\/\/www.nhlbi.nih.gov\/news)\n    - [NHLBI News](https:\/\/www.nhlbi.nih.gov\/news?type%5Bpress_release%5D=press_release)\n    - [NHLBI in the Press](https:\/\/www.nhlbi.nih.gov\/news?type%5Bnews_mention%5D=news_mention)\n    - [Featured Article](https:\/\/www.nhlbi.nih.gov\/news?type%5Bfeature_article%5D=feature_article)\n    - [Ask a Scientist](https:\/\/www.nhlbi.nih.gov\/ask-a-scientist)\n  - [All Events](https:\/\/www.nhlbi.nih.gov\/events)\n    - [Past Events](https:\/\/www.nhlbi.nih.gov\/events?field_event_status%5Bclosed%5D=closed)\n    - [Upcoming Events](https:\/\/www.nhlbi.nih.gov\/events?field_event_status%5Bupcoming%5D=upcoming)\n- About NHLBI\n  - [About NHLBI Home](https:\/\/www.nhlbi.nih.gov\/about)\n    - [Mission and Strategic Vision](https:\/\/www.nhlbi.nih.gov\/about\/strategic-vision)\n    - [Leadership](https:\/\/www.nhlbi.nih.gov\/about\/leadership)\n    - [Divisions, Offices and Centers](https:\/\/www.nhlbi.nih.gov\/about\/divisions)\n    - [Advisory Committees](https:\/\/www.nhlbi.nih.gov\/about\/advisory-and-peer-review-committees)\n    - [Budget and Legislative Information](https:\/\/www.nhlbi.nih.gov\/about\/budget-and-legislative-information)\n    - [Jobs and Working at the NHLBI](https:\/\/www.nhlbi.nih.gov\/about\/working-at-nhlbi)\n    - [Contact and FAQs](https:\/\/www.nhlbi.nih.gov\/contact)\n    - [NIH Sleep Research Plan](https:\/\/www.nhlbi.nih.gov\/sleep-research-plan)\n- [HOME](https:\/\/www.nhlbi.nih.gov\/)\n\nHow Sleep Works\n\n- [Home](https:\/\/www.nhlbi.nih.gov\/)\n- [Health Topics](https:\/\/www.nhlbi.nih.gov\/node\/93751)\n- [\\< Back To How Sleep Works](https:\/\/www.nhlbi.nih.gov\/node\/93058)\n- How Much Sleep Is Enough?\n\n0\n\n[How Sleep Works](https:\/\/www.nhlbi.nih.gov\/health\/sleep\/how-much-sleep)\n\n[MENU]()\n\n- [Home](https:\/\/www.nhlbi.nih.gov\/)\n- [Health Topics](https:\/\/www.nhlbi.nih.gov\/node\/93751)\n- [\\< Back To How Sleep Works](https:\/\/www.nhlbi.nih.gov\/node\/93058)\n- How Much Sleep Is Enough?\n\n- [How Sleep Works](https:\/\/www.nhlbi.nih.gov\/health\/sleep)\n- [Your Sleep\/Wake Cycle](https:\/\/www.nhlbi.nih.gov\/health\/sleep\/sleep-wake-cycle)\n- [Sleep Phases and Stages](https:\/\/www.nhlbi.nih.gov\/health\/sleep\/stages-of-sleep)\n- [Why Is Sleep Important?](https:\/\/www.nhlbi.nih.gov\/health\/sleep\/why-sleep-important)\n- [How Much Sleep Is Enough?](https:\/\/www.nhlbi.nih.gov\/health\/sleep\/how-much-sleep)\n\nMORE INFORMATION\n\n[Fact Sheets and Handouts](https:\/\/www.nhlbi.nih.gov\/resources?f%5B0%5D=related_health_topics%3AHow%20Sleep%20Works)\n\n[Research](https:\/\/www.nhlbi.nih.gov\/research\/sleep-apnea)\n\nHow Sleep Works\n\n# How Sleep Works How Much Sleep Is Enough?\n[![Share](https:\/\/www.nhlbi.nih.gov\/themes\/custom\/nhlbi\/images\/share-alt-icon.svg)](https:\/\/www.addtoany.com\/share#url=https%3A%2F%2Fwww.nhlbi.nih.gov%2Fhealth%2Fsleep%2Fhow-much-sleep&title=How%20Much%20Sleep%20Is%20Enough%3F%20 \"Share\")\n\n[Email](https:\/\/www.nhlbi.nih.gov\/#email \"Email\")\n\n[Print](https:\/\/www.nhlbi.nih.gov\/#print \"Print\")\n\n## Language switcher\n- [English](https:\/\/www.nhlbi.nih.gov\/health\/sleep\/how-much-sleep)\n- [Español](https:\/\/www.nhlbi.nih.gov\/es\/salud\/sueno\/cuanto-dormir)\n\nExperts recommend that adults sleep between 7 and 9 hours a night.\n\nAdults who sleep less than 7 hours a night may have more health issues than those who sleep 7 or more hours a night. Sleeping more than 9 hours a night is not necessarily harmful and may be helpful for young adults, people who are recovering from sleep deprivation, and people who are sick.\n\nHow much sleep children should get depends on their age. Sleep experts consider naps to be appropriate for children under age 7.\n\n## Recommended hours of sleep\nBelow you can find the recommended hours of sleep, including naps, for different ages.\n\n- For newborns younger than 4 months, sleep patterns vary widely.\n- Babies 4 months to 1 year old should sleep 12 to 16 hours per day.\n- Children 1 to 2 years old should sleep 11 to 14 hours per day.\n- Children 3 to 5 years old should sleep 10 to 13 hours per day.\n- Children 6 to 12 years old should sleep 9 to 12 hours per day.\n- Teens 13 to 18 years old should sleep 8 to 10 hours per day.\n\nTalk to your doctor or your child’s doctor if you think you or your child is sleeping too much or too little.\n\n### Book traversal links for How Sleep Works\n- #### Previous\n  [Why Is Sleep Important?](https:\/\/www.nhlbi.nih.gov\/health\/sleep\/why-sleep-important \"Go to previous page\")\n\nLast updated on\n\nMarch 24, 2022\n\nBack To Top Link\n\n[Back to top](https:\/\/www.nhlbi.nih.gov\/health\/sleep\/how-much-sleep#main-content)\n\nWeb Policies & Notices\n\n- [Accessibility](https:\/\/www.nhlbi.nih.gov\/about\/contact\/website-privacy-and-accessibility)\n- [No FEAR Act Data](https:\/\/eeo.nih.gov\/no-fear-act)\n- [Privacy Policy](https:\/\/www.nhlbi.nih.gov\/about\/contact\/website-privacy-and-accessibility\/privacy-statement)\n- [Freedom of Information Act (FOIA)](https:\/\/www.nhlbi.nih.gov\/about\/contact\/website-privacy-and-accessibility)\n- [HHS Vulnerability Disclosure](https:\/\/www.hhs.gov\/vulnerability-disclosure-policy\/index.html) [(link is external)](https:\/\/www.nhlbi.nih.gov\/health\/sleep\/how-much-sleep)\n\nRelated Government Websites\n\n- [Health and Human Services](https:\/\/www.hhs.gov\/) [(link is external)](https:\/\/www.nhlbi.nih.gov\/health\/sleep\/how-much-sleep)\n- [National Institutes of Health](https:\/\/www.nih.gov\/)\n- [Office of the Inspector General](https:\/\/oig.hhs.gov\/) [(link is external)](https:\/\/www.nhlbi.nih.gov\/health\/sleep\/how-much-sleep)\n- [USA.gov](https:\/\/www.usa.gov\/) [(link is external)](https:\/\/www.nhlbi.nih.gov\/health\/sleep\/how-much-sleep)\n\nStay Connected\n\n- ![chat bubbles](https:\/\/www.nhlbi.nih.gov\/themes\/custom\/nhlbi\/images\/messages-question-regular.svg) [Live Chat](https:\/\/www.nhlbi.nih.gov\/health\/sleep\/how-much-sleep)\n  Live Chat with us, Monday through Friday, 8:30 a.m. to 5:00 p.m. EST.\n- ![envelope](https:\/\/www.nhlbi.nih.gov\/themes\/custom\/nhlbi\/images\/envelope-open-text-solid.svg)[Get Email Alerts](https:\/\/www.nhlbi.nih.gov\/news-and-events\/email-alerts)\n  Receive automatic alerts about NHLBI related news and highlights from across the Institute.\n\nFooter Bottom\n\n[![National Heart, Lung, and Blood Home](https:\/\/www.nhlbi.nih.gov\/themes\/custom\/nhlbi\/images\/NHLBI_HHS_Lockup_white.svg)](https:\/\/www.nhlbi.nih.gov\/)\n\n- [Contact Us](https:\/\/www.nhlbi.nih.gov\/contact)\n- [Site Index](https:\/\/www.nhlbi.nih.gov\/siteindex)\n- [Jobs](https:\/\/www.nhlbi.nih.gov\/about\/working-at-nhlbi)\n\n- [![Facebook social media](https:\/\/www.nhlbi.nih.gov\/themes\/custom\/nhlbi\/images\/ico-facebook-white.svg)](https:\/\/www.facebook.com\/NIH.NHLBI)\n- [![Youtube social media](https:\/\/www.nhlbi.nih.gov\/themes\/custom\/nhlbi\/images\/ico-youtube-white.svg)](https:\/\/www.youtube.com\/user\/NHLBI)\n- [![LinkedIn social media](https:\/\/www.nhlbi.nih.gov\/themes\/custom\/nhlbi\/images\/linkedin-brands.svg)](https:\/\/www.linkedin.com\/company\/national-heart-lung-and-blood-institute)\n\n✓\n\nThanks for sharing\\!\n\n[AddToAny](https:\/\/www.addtoany.com\/ \"Share Buttons\")\n\n[More…](https:\/\/www.nhlbi.nih.gov\/health\/sleep\/how-much-sleep#addtoany \"Show all\")\n\nExternal Web Site Policy\n\nClose\n\nOK","attrs_readable_markdown":"Experts recommend that adults sleep between 7 and 9 hours a night.\n\nAdults who sleep less than 7 hours a night may have more health issues than those who sleep 7 or more hours a night. Sleeping more than 9 hours a night is not necessarily harmful and may be helpful for young adults, people who are recovering from sleep deprivation, and people who are sick.\n\nHow much sleep children should get depends on their age. Sleep experts consider naps to be appropriate for children under age 7.\n\n## Recommended hours of sleep\nBelow you can find the recommended hours of sleep, including naps, for different ages.\n\n- For newborns younger than 4 months, sleep patterns vary widely.\n- Babies 4 months to 1 year old should sleep 12 to 16 hours per day.\n- Children 1 to 2 years old should sleep 11 to 14 hours per day.\n- Children 3 to 5 years old should sleep 10 to 13 hours per day.\n- Children 6 to 12 years old should sleep 9 to 12 hours per day.\n- Teens 13 to 18 years old should sleep 8 to 10 hours per day.\n\nTalk to your doctor or your child’s doctor if you think you or your child is sleeping too much or too little.","meta_canonical":null}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📄

INDEXABLE

✅

CRAWLED

1 month ago

🤖

ROBOTS ALLOWED

Page Info Filters

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	1.6 months ago
History drop	PASS	`isNull(history_drop_reason)`	No drop reason
Spam/ban	PASS	`fh_dont_index != 1 AND ml_spam_score = 0`	ml_spam_score=0
Canonical	PASS	`meta_canonical IS NULL OR = '' OR = src_unparsed`	Not set

Page Details

Property	Value
URL	https://www.nhlbi.nih.gov/health/sleep/how-much-sleep
Last Crawled	2026-03-01 06:38:25 (1 month ago)
First Indexed	2022-04-07 15:41:50 (4 years ago)
HTTP Status Code	200
Meta Title	How Sleep Works - How Much Sleep Is Enough? \| NHLBI, NIH
Meta Description	Learn about how sleep works, and how many hours of sleep to get each night--no matter what your age.
Meta Canonical	null
Boilerpipe Text	Experts recommend that adults sleep between 7 and 9 hours a night. Adults who sleep less than 7 hours a night may have more health issues than those who sleep 7 or more hours a night. Sleeping more than 9 hours a night is not necessarily harmful and may be helpful for young adults, people who are recovering from sleep deprivation, and people who are sick. How much sleep children should get depends on their age. Sleep experts consider naps to be appropriate for children under age 7. Recommended hours of sleep Below you can find the recommended hours of sleep, including naps, for different ages. For newborns younger than 4 months, sleep patterns vary widely. Babies 4 months to 1 year old should sleep 12 to 16 hours per day. Children 1 to 2 years old should sleep 11 to 14 hours per day. Children 3 to 5 years old should sleep 10 to 13 hours per day. Children 6 to 12 years old should sleep 9 to 12 hours per day. Teens 13 to 18 years old should sleep 8 to 10 hours per day. Talk to your doctor or your child’s doctor if you think you or your child is sleeping too much or too little.
Markdown	[Skip to main content](https://www.nhlbi.nih.gov/health/sleep/how-much-sleep#main-content) ![U.S. flag](https://www.nhlbi.nih.gov/themes/custom/nhlbi/assets/uswds/dist/img/us_flag_small.png) An official website of the United States government Here’s how you know Here’s how you know ![](https://www.nhlbi.nih.gov/themes/custom/nhlbi/assets/uswds/dist/img/icon-dot-gov.svg) Official websites use .gov A .gov website belongs to an official government organization in the United States. ![](https://www.nhlbi.nih.gov/themes/custom/nhlbi/assets/uswds/dist/img/icon-https.svg) Secure .gov websites use HTTPS A lock ( A locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. 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0 [How Sleep Works](https://www.nhlbi.nih.gov/health/sleep/how-much-sleep) [MENU]() - [Home](https://www.nhlbi.nih.gov/) - [Health Topics](https://www.nhlbi.nih.gov/node/93751) - [\< Back To How Sleep Works](https://www.nhlbi.nih.gov/node/93058) - How Much Sleep Is Enough? - [How Sleep Works](https://www.nhlbi.nih.gov/health/sleep) - [Your Sleep/Wake Cycle](https://www.nhlbi.nih.gov/health/sleep/sleep-wake-cycle) - [Sleep Phases and Stages](https://www.nhlbi.nih.gov/health/sleep/stages-of-sleep) - [Why Is Sleep Important?](https://www.nhlbi.nih.gov/health/sleep/why-sleep-important) - [How Much Sleep Is Enough?](https://www.nhlbi.nih.gov/health/sleep/how-much-sleep) MORE INFORMATION [Fact Sheets and Handouts](https://www.nhlbi.nih.gov/resources?f%5B0%5D=related_health_topics%3AHow%20Sleep%20Works) [Research](https://www.nhlbi.nih.gov/research/sleep-apnea) How Sleep Works # How Sleep Works How Much Sleep Is Enough? [![Share](https://www.nhlbi.nih.gov/themes/custom/nhlbi/images/share-alt-icon.svg)](https://www.addtoany.com/share#url=https%3A%2F%2Fwww.nhlbi.nih.gov%2Fhealth%2Fsleep%2Fhow-much-sleep&title=How%20Much%20Sleep%20Is%20Enough%3F%20 "Share") [Email](https://www.nhlbi.nih.gov/#email "Email") [Print](https://www.nhlbi.nih.gov/#print "Print") ## Language switcher - [English](https://www.nhlbi.nih.gov/health/sleep/how-much-sleep) - [Español](https://www.nhlbi.nih.gov/es/salud/sueno/cuanto-dormir) Experts recommend that adults sleep between 7 and 9 hours a night. Adults who sleep less than 7 hours a night may have more health issues than those who sleep 7 or more hours a night. Sleeping more than 9 hours a night is not necessarily harmful and may be helpful for young adults, people who are recovering from sleep deprivation, and people who are sick. How much sleep children should get depends on their age. Sleep experts consider naps to be appropriate for children under age 7. ## Recommended hours of sleep Below you can find the recommended hours of sleep, including naps, for different ages. - For newborns younger than 4 months, sleep patterns vary widely. - Babies 4 months to 1 year old should sleep 12 to 16 hours per day. - Children 1 to 2 years old should sleep 11 to 14 hours per day. - Children 3 to 5 years old should sleep 10 to 13 hours per day. - Children 6 to 12 years old should sleep 9 to 12 hours per day. - Teens 13 to 18 years old should sleep 8 to 10 hours per day. Talk to your doctor or your child’s doctor if you think you or your child is sleeping too much or too little. ### Book traversal links for How Sleep Works - #### Previous [Why Is Sleep Important?](https://www.nhlbi.nih.gov/health/sleep/why-sleep-important "Go to previous page") Last updated on March 24, 2022 Back To Top Link [Back to top](https://www.nhlbi.nih.gov/health/sleep/how-much-sleep#main-content) Web Policies & Notices - [Accessibility](https://www.nhlbi.nih.gov/about/contact/website-privacy-and-accessibility) - [No FEAR Act Data](https://eeo.nih.gov/no-fear-act) - [Privacy Policy](https://www.nhlbi.nih.gov/about/contact/website-privacy-and-accessibility/privacy-statement) - [Freedom of Information Act (FOIA)](https://www.nhlbi.nih.gov/about/contact/website-privacy-and-accessibility) - [HHS Vulnerability Disclosure](https://www.hhs.gov/vulnerability-disclosure-policy/index.html) [(link is external)](https://www.nhlbi.nih.gov/health/sleep/how-much-sleep) Related Government Websites - [Health and Human Services](https://www.hhs.gov/) [(link is external)](https://www.nhlbi.nih.gov/health/sleep/how-much-sleep) - [National Institutes of Health](https://www.nih.gov/) - [Office of the Inspector General](https://oig.hhs.gov/) [(link is external)](https://www.nhlbi.nih.gov/health/sleep/how-much-sleep) - [USA.gov](https://www.usa.gov/) [(link is external)](https://www.nhlbi.nih.gov/health/sleep/how-much-sleep) Stay Connected - ![chat bubbles](https://www.nhlbi.nih.gov/themes/custom/nhlbi/images/messages-question-regular.svg) [Live Chat](https://www.nhlbi.nih.gov/health/sleep/how-much-sleep) Live Chat with us, Monday through Friday, 8:30 a.m. to 5:00 p.m. EST. - ![envelope](https://www.nhlbi.nih.gov/themes/custom/nhlbi/images/envelope-open-text-solid.svg)[Get Email Alerts](https://www.nhlbi.nih.gov/news-and-events/email-alerts) Receive automatic alerts about NHLBI related news and highlights from across the Institute. 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Readable Markdown	Experts recommend that adults sleep between 7 and 9 hours a night. Adults who sleep less than 7 hours a night may have more health issues than those who sleep 7 or more hours a night. Sleeping more than 9 hours a night is not necessarily harmful and may be helpful for young adults, people who are recovering from sleep deprivation, and people who are sick. How much sleep children should get depends on their age. Sleep experts consider naps to be appropriate for children under age 7. ## Recommended hours of sleep Below you can find the recommended hours of sleep, including naps, for different ages. - For newborns younger than 4 months, sleep patterns vary widely. - Babies 4 months to 1 year old should sleep 12 to 16 hours per day. - Children 1 to 2 years old should sleep 11 to 14 hours per day. - Children 3 to 5 years old should sleep 10 to 13 hours per day. - Children 6 to 12 years old should sleep 9 to 12 hours per day. - Teens 13 to 18 years old should sleep 8 to 10 hours per day. Talk to your doctor or your child’s doctor if you think you or your child is sleeping too much or too little.
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