2019 revision of the SI

Quality:

Redefinition of SI base units - revised definitions of the SI base units, adopted at the 26th General Conference on Weights and Measures (CGPM), that came into force on 20 May 2019. Article "2019 revision of the SI" in English Wikipedia has 84.4 points for quality (as of July 1, 2025). The article contains 111 references and 24 sections.

This article has the best quality in Chinese Wikipedia. However, this article is the most popular in English version.

In June 2025 the article "2019 revision of the SI" was edited by 1 authors in English Wikipedia and written by 2 authors in all languages.

Since the creation of article "2019 revision of the SI", its content was written by 285 registered users of English Wikipedia and edited by 598 registered Wikipedia users in all languages.

The article is cited 193 times in English Wikipedia and cited 1050 times in all languages.

The highest Authors Interest rank from 2001:

• Local (English): #63 in November 2018
• Global: #120 in November 2018

The highest popularity rank from 2008:

• Local (English): #1051 in November 2018
• Global: #2342 in November 2018

There are 22 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2025 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

#	Language	Quality grade	Quality score
1	Chinese (zh) 2019年國際單位制基本單位重新定義		94.1588
2	English (en) 2019 revision of the SI		84.3818
3	Czech (cs) Nové definice SI		74.8533
4	Romanian (ro) Redefinirea unităților fundamentale din sistemul internațional din 2019		70.9765
5	Indonesian (id) Redefinisi satuan pokok SI 2019		67.7855
6	Malay (ms) Pentakrifan semula unit asas SI 2019		50.6426
7	Ukrainian (uk) Зміни визначень основних одиниць (SI)		48.7628
8	Russian (ru) Изменения определений основных единиц СИ (2019)		43.8415
9	French (fr) Redéfinition du Système international d'unités de 2018-2019		41.4882
10	Japanese (ja) SI基本単位の再定義 (2019年)		36.6711

The following table shows the most popular language versions of the article.

#	Language	Popularity award	Relative popularity
1	English (en) 2019 revision of the SI		1 776 729
2	Japanese (ja) SI基本単位の再定義 (2019年)		327 252
3	Spanish (es) Redefinición de las unidades del SI		185 240
4	Russian (ru) Изменения определений основных единиц СИ (2019)		121 667
5	Chinese (zh) 2019年國際單位制基本單位重新定義		106 830
6	French (fr) Redéfinition du Système international d'unités de 2018-2019		100 920
7	Czech (cs) Nové definice SI		69 527
8	Arabic (ar) إعادة تعريف الوحدات الأساسية في النظام الدولي للوحدات		48 439
9	Vietnamese (vi) Định nghĩa lại đơn vị cơ bản SI năm 2019		23 992
10	Indonesian (id) Redefinisi satuan pokok SI 2019		22 482

The following table shows the language versions of the article with the highest popularity in the last month.

#	Language	Popularity award	Relative popularity
1	English (en) 2019 revision of the SI		6 720
2	Japanese (ja) SI基本単位の再定義 (2019年)		798
3	Russian (ru) Изменения определений основных единиц СИ (2019)		656
4	Chinese (zh) 2019年國際單位制基本單位重新定義		415
5	French (fr) Redéfinition du Système international d'unités de 2018-2019		325
6	Spanish (es) Redefinición de las unidades del SI		173
7	Czech (cs) Nové definice SI		120
8	Indonesian (id) Redefinisi satuan pokok SI 2019		79
9	Arabic (ar) إعادة تعريف الوحدات الأساسية في النظام الدولي للوحدات		78
10	Vietnamese (vi) Định nghĩa lại đơn vị cơ bản SI năm 2019		55

The following table shows the language versions of the article with the highest Authors’ Interest.

#	Language	AI award	Relative AI
1	English (en) 2019 revision of the SI		285
2	French (fr) Redéfinition du Système international d'unités de 2018-2019		66
3	Chinese (zh) 2019年國際單位制基本單位重新定義		49
4	Japanese (ja) SI基本単位の再定義 (2019年)		37
5	Spanish (es) Redefinición de las unidades del SI		30
6	Persian (fa) بازتعریف یکاهای پایه اس‌آی (۲۰۱۹)		29
7	Czech (cs) Nové definice SI		27
8	Russian (ru) Изменения определений основных единиц СИ (2019)		21
9	Arabic (ar) إعادة تعريف الوحدات الأساسية في النظام الدولي للوحدات		12
10	Portuguese (pt) Redefinição das unidades do SI		6

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

#	Language	AI award	Relative AI
1	English (en) 2019 revision of the SI		1
2	Chinese (zh) 2019年國際單位制基本單位重新定義		1
3	Arabic (ar) إعادة تعريف الوحدات الأساسية في النظام الدولي للوحدات		0
4	Belarusian (be) Новыя вызначэнні СІ		0
5	Bulgarian (bg) Новите определения в SI		0
6	Czech (cs) Nové definice SI		0
7	Danish (da) 2019 redefinition af SI-enhederne		0
8	Spanish (es) Redefinición de las unidades del SI		0
9	Basque (eu) 2019ko SI oinarrizko unitateen birdefinizioa		0
10	Persian (fa) بازتعریف یکاهای پایه اس‌آی (۲۰۱۹)		0

The following table shows the language versions of the article with the highest number of citations.

On 12 August 2025 in multilingual Wikipedia, Internet users most often read articles on the following topics: Cristiano Ronaldo, Wednesday, Georgina Rodríguez, ChatGPT, Weapons, Jenna Ortega, deaths in 2025, Taylor Swift, Miguel Uribe Turbay, 2025–26 UEFA Champions League.

In English Wikipedia the most popular articles on that day were: Weapons (2025 film), Danielle Spencer (American actress), Cristiano Ronaldo, Deaths in 2025, Taylor Swift, Wednesday (TV series), Superman (2025 film), Georgina Rodríguez, Coolie (2025 film), The Fantastic Four: First Steps.

The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 44 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2025. When calculating current popularity and AI of articles data from June 2025 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2025... More information