# second (Q11574) | Property ID | Property | Value | Value entity | Amount | Unit | Date / from | Until | Rank | Sources | | --- | --- | --- | --- | ---: | --- | --- | --- | --- | --- | | P31 | Instance of | SI base unit | Q223662 | | | | | normal | ISO 80000-1:2009 Quantities and units—Part 1: General | | P31 | Instance of | unit of time | Q1790144 | | | | | normal | https://www.bipm.org/metrology/time-frequency/units.html | | P31 | Instance of | UCUM base unit | Q82047053 | | | | | normal | | | P31 | Instance of | SI unit with special name | Q68618328 | | | | | normal | | | P361 | Part of | minute | Q7727 | | | | | normal | | | P361 | Part of | centimeter–gram–second system of units | Q26240 | | | | | normal | | | P361 | Part of | MKS system of units | Q512417 | | | | | normal | | | P111 | Measured physical quantity | duration | Q2199864 | | | | | preferred | ISO 80000-1:2009 Quantities and units—Part 1: General \| SI Brochure (9th edition): Concise summary | | P111 | Measured physical quantity | specific impulse by weight | Q100828354 | | | | | normal | | | P111 | Measured physical quantity | half-life | Q47270 | | | | | normal | | | P111 | Measured physical quantity | reactor time constant | Q99518950 | | | | | normal | | | P2370 | Conversion to SI unit | 1 s | | 1 | s | | | normal | | | P2803 | Wikidata time precision | 14 | | 14 | | | | normal | | | P2442 | Conversion to standard unit | 3.171e-11 millennium | | 3.170979198377e-11 | millennium | | | preferred | | | P2442 | Conversion to standard unit | 3.171e-10 century | | 3.170979198377e-10 | century | | | preferred | | | P2442 | Conversion to standard unit | 3.171e-9 decade | | 3.170979198377e-9 | decade | | | preferred | | | P2442 | Conversion to standard unit | 3.169e-8 Julian year | | 3.168808781403e-8 | Julian year | | | preferred | | | P2442 | Conversion to standard unit | 3.169e-8 Gregorian year | | 3.168873850681e-8 | Gregorian year | | | preferred | | | P2442 | Conversion to standard unit | 3.169e-8 tropical year | | 3.168876462184e-8 | tropical year | | | preferred | | | P2442 | Conversion to standard unit | 3.171e-8 years | | 3.170979198377e-8 | years | | | preferred | | | P2442 | Conversion to standard unit | 3.803e-7 months | | 3.802537330419e-7 | months | | | preferred | | | P2442 | Conversion to standard unit | 8.267e-7 fortnight | | 8.267195767196e-7 | fortnight | | | preferred | | | P2442 | Conversion to standard unit | 1.653e-6 weeks | | 0.000001653439153439 | weeks | | | preferred | | | P2442 | Conversion to standard unit | 1.157e-5 days | | 0.00001157407407407 | days | | | preferred | | | P2442 | Conversion to standard unit | 0.0002778 h | | 0.0002777777777778 | h | | | preferred | | | P2442 | Conversion to standard unit | 0.01667 min | | 0.01666666666667 | min | | | preferred | | | P2442 | Conversion to standard unit | 1,000 millisecond | | 1000 | millisecond | | | preferred | | | P2442 | Conversion to standard unit | 1,000,000 microsecond | | 1000000 | microsecond | | | preferred | | | P2442 | Conversion to standard unit | 1B nanosecond | | 1000000000 | nanosecond | | | preferred | | | P2442 | Conversion to standard unit | 10 decisecond | | 10 | decisecond | | | preferred | | | P2442 | Conversion to standard unit | 1.157e-5 days | | 0.00001157407 | days | | 1950-00-00 | normal | | | P2442 | Conversion to standard unit | 3.169e-8 tropical year | | 3.168876464081849e-8 | tropical year | 1956-00-00 | 1967-00-00 | normal | | | P2442 | Conversion to standard unit | 9.19B oscillation | | 9192631770 | oscillation | 1967-00-00 | | normal | https://www.bipm.org/metrology/time-frequency/units.html | | P1889 | Different from | Sekunde | Q22699224 | | | | | normal | | | P1889 | Different from | step | Q636099 | | | | | normal | | | P1889 | Different from | arcsecond | Q829073 | | | | | normal | | | P1889 | Different from | Sekunda | Q15710315 | | | | | normal | | | P1181 | Numeric value | 9.19B Hz | | 9192631770 | Hz | 1967-00-00 | | normal | https://www.bipm.org/metrology/time-frequency/units.html | | P1181 | Numeric value | 3.169e-8 tropical year | | 3.168876464081849e-8 | tropical year | 1956-00-00 | 1967-00-00 | normal | | | P9059 | Subdivision of this unit | decisecond | Q3251645 | | | | | normal | | | P9059 | Subdivision of this unit | tierce | Q2405892 | | | | | normal | | | P9059 | Subdivision of this unit | millisecond | Q723733 | | | | | normal | | | P9059 | Subdivision of this unit | microsecond | Q842015 | | | | | normal | | | P1813 | Short name | sek. | | | | | | normal | | | P1813 | Short name | sek. | | | | | | normal | | | P1813 | Short name | sek. | | | | | | normal | | | P1813 | Short name | s | | | | | | normal | | | P1813 | Short name | sec | | | | | | normal | | | P2959 | Permanent duplicated item | Q110322053 | Q110322053 | | | | | normal | | | P279 | Subclass of | time interval | Q186081 | | | | | normal | | | P5061 | Unit symbol | s | | | | | | normal | Logopedia \| ISO 80000-1:2009 Quantities and units—Part 1: General \| ISO 80000-3:2006 Quantities and units — Part 3: Space and time \| ISO 80000-3:2006 Quantities and units — Part 3: Space and time \| ISO 80000-3:2006 Quantities and units — Part 3: Space and time \| SI Brochure (9th edition): Concise summary | | P5061 | Unit symbol | san | | | | | | normal | | | P5061 | Unit symbol | с | | | | | | normal | | | P5061 | Unit symbol | с | | | | | | normal | | | P5061 | Unit symbol | 秒 | | | | | | normal | | | P5061 | Unit symbol | 秒 | | | | | | normal | | | P5061 | Unit symbol | 秒 | | | | | | normal | | | P5061 | Unit symbol | ث | | | | | | normal | | | P5061 | Unit symbol | s | | | | | | normal | | | P5061 | Unit symbol | s | | | | | | normal | | | P13750 | Arab Encyclopedia concept ID | 5390 | | | | | | normal | https://arab-ency.com.sy/details/5390 | | P6771 | Arabic Ontology concept ID | 293590 | | | | | | normal | https://ontology.birzeit.edu/concept/293590 | | P12451 | Arabic Ontology lexical concept ID | 151081830 | | | | | | normal | https://ontology.birzeit.edu/lexicalconcept/151081830 | | P1014 | Art & Architecture Thesaurus ID | 300379239 | | | | | | normal | https://vocab.getty.edu/page/aat/300379239 | | P7033 | Australian Educational Vocabulary ID | scot/15221 | | | | | | normal | https://vocabulary.curriculum.edu.au/scot/15221.html | | P2581 | BabelNet ID | 00068672n | | | | | | normal | https://babelnet.org/synset?id=bn%00068672n&lang=EN | | P14870 | Common Core Ontologies concept ID | ont00000992 | | | | | | normal | https://www.commoncoreontologies.org/ont00000992 | | P10730 | Data Commons ID | Second | | | | | | normal | https://datacommons.org/browser/Second | | P1417 | Encyclopædia Britannica Online ID | topic/SI-second | | | | | | normal | https://www.britannica.com/topic/SI-second | | P14541 | Encyclopedia of China (Third Edition) ID (2026) | 1AO0vx | | | | | | normal | https://www.zgbk.com/ecph/words?SiteID=1&ID=1AO0vx | | P10565 | Encyclopedia of China (Third Edition) old ID (2021) | 173647 | | | | | | normal | https://web.archive.org/web/0/https://www.zgbk.com/ecph/words?SiteID=1&ID=173647 | | P9475 | Encyclopedia of Korean Culture ID | E0056929 | | | | | | normal | http://encykorea.aks.ac.kr/Article/E0056929 | | P8168 | FactGrid item ID | Q1479348 | | | | | | normal | https://database.factgrid.de/wiki/Item:Q1479348 | | P646 | Freebase ID | /m/06nxt | | | | | | normal | https://www.google.com/search?kgmid=/m/06nxt | | P227 | GND ID | 1188905376 | | | | | | normal | https://d-nb.info/gnd/1188905376 | | P2671 | Google Knowledge Graph ID | /g/11bc5vy5tf | | | | | | normal | https://www.google.com/search?kgmid=/g/11bc5vy5tf | | P4342 | Great Norwegian Encyclopedia ID | sekund | | | | | | normal | https://wikidata-externalid-url.toolforge.org/?p=4342&url_prefix=https://snl.no/&id=sekund | | P2924 | Great Russian Encyclopedia Online ID (2017) | 3546123 | | | | | | normal | https://web.archive.org/web/0/old.bigenc.ru/text/3546123 | | P8855 | IEV number | 112-02-04 | | | | | | normal | https://www.electropedia.org/iev/iev.nsf/display?openform&ievref=112-02-04 | | P5063 | Interlingual Index ID | i117299 | | | | | | normal | https://globalwordnet.github.io/cili/i117299 | | P4732 | IUPAC Gold Book ID | S05513 | | | | | | normal | https://goldbook.iupac.org/terms/view/S05513 | | P6573 | Klexikon article ID | Sekunde | | | | | | normal | https://klexikon.zum.de/wiki/Sekunde | | P6870 | Latvian National Encyclopedia Online ID | 147598 | | | | | | normal | https://enciklopedija.lv/skirklis/147598 | | P8313 | Lex ID | sekund | | | | | | normal | https://wikidata-externalid-url.toolforge.org/?p=8313&url_prefix=https://lex.dk/&id=sekund | | P12596 | Museum-digital tag ID | 145988 | | | | | | normal | https://term.museum-digital.de/md-de/tag/145988 | | P8885 | Namuwiki ID | 초(단위) | | | | | | normal | https://namu.wiki/w/%EC%B4%88(%EB%8B%A8%EC%9C%84) | | P9495 | National Historical Museums of Sweden ID | term/814cbfab-a5f9-42b8-adcc-6f5a60ddb21c | | | | | | normal | https://samlingar.shm.se/term/814cbfab-a5f9-42b8-adcc-6f5a60ddb21c | | P1748 | NCI Thesaurus ID | C42535 | | | | | | normal | https://evsexplore.semantics.cancer.gov/evsexplore/concept/ncit/C42535 | | P4215 | NLab ID | second | | | | | | normal | https://ncatlab.org/nlab/show/second | | P1245 | OmegaWiki Defined Meaning | 5947 | | | | | | normal | http://www.omegawiki.org/DefinedMeaning:(5947) | | P8769 | Ontology of units of Measure 2.0 unit ID | second-Time | | | | | | normal | http://www.ontology-of-units-of-measure.org/resource/om-2/second-Time | | P6781 | ProofWiki ID | Definition:Time/Unit/Second | | | | | | normal | https://proofwiki.org/wiki/Definition%3ATime/Unit/Second | | P13625 | QUDT dimension ID | A0E0L0I0M0H0T1D0 | | | | | | normal | http://qudt.org/vocab/dimensionvector/A0E0L0I0M0H0T1D0 | | P2968 | QUDT unit ID | SEC | | | | | | normal | https://qudt.org/vocab/unit/SEC | | P3417 | Quora topic ID | Seconds | | | | | | normal | https://www.quora.com/topic/Seconds | | P3365 | Treccani ID | secondo | | | | | | normal | https://www.treccani.it/enciclopedia/secondo | | P7825 | UCUM code | s | | | | | | normal | | | P2892 | UMLS CUI | C0457385 | | | | | | normal | https://evsexplore.semantics.cancer.gov/evsexplore/concept/ncim/C0457385 | | P6512 | UN/CEFACT Common Code | SEC | | | | | | normal | | | P12086 | WikiKids ID | Seconde | | | | | | normal | https://wikikids.nl/Seconde | | P7007 | Wolfram Language unit code | "Seconds" | | | | | | normal | | | P8814 | WordNet 3.1 Synset ID | 15259923-n | | | | | | normal | https://en-word.net/view/synset/15259923-n | | P3328 | Wurvoc.org measure ID | second-time | | | | | | normal | http://www.wurvoc.org/vocabularies/om-1.8/second-time | Source: https://aidb.si/e/second-Q11574 — Wikidata (CC0) via AIDB