Calcium oxide

Quality:

Calcium oxide - chemical compound. Article “Calcium oxide” in English Wikipedia has 48.4 points for quality (as of July 1, 2026). The article contains 36 references and 8 sections.

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

In June 2026 the article “Calcium oxide” was edited by 4 authors in English Wikipedia and written by 9 authors in all languages.

Since the creation of article “Calcium oxide”, its content was written by 330 registered users of English Wikipedia and edited by 1708 registered Wikipedia users in all languages.

The article is cited 1006 times in English Wikipedia and cited 8037 times in all languages.

The highest Authors Interest rank from 2001:

• Local (English): #6025 in November 2002
• Global: #3228 in July 2010

The highest popularity rank from 2008:

• Local (English): #7563 in January 2020
• Global: #6766 in February 2015

There are 49 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, 2026 (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) 氧化鈣		56.652
2	Tamil (ta) கால்சியம் ஆக்சைடு		53.8478
3	Esperanto (eo) Kalcia oksido		51.3075
4	English (en) Calcium oxide		48.3503
5	German (de) Calciumoxid		45.716
6	Greek (el) Οξείδιο του ασβεστίου		42.8906
7	Simple English (simple) Calcium oxide		36.5355
8	Catalan (ca) Òxid de calci		33.9996
9	Turkish (tr) Kalsiyum oksit		33.1198
10	Spanish (es) Óxido de calcio		32.2516

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

#	Language	Popularity award	Relative popularity
1	English (en) Calcium oxide		8 222 443
2	Spanish (es) Óxido de calcio		4 691 524
3	German (de) Calciumoxid		1 900 972
4	Russian (ru) Оксид кальция		1 790 029
5	Portuguese (pt) Cal		1 608 808
6	Japanese (ja) 酸化カルシウム		1 476 941
7	Polish (pl) Tlenek wapnia		764 301
8	Italian (it) Ossido di calcio		457 190
9	Chinese (zh) 氧化鈣		438 426
10	Czech (cs) Oxid vápenatý		418 437

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) Calcium oxide		15 775
2	German (de) Calciumoxid		3 762
3	Japanese (ja) 酸化カルシウム		2 166
4	Russian (ru) Оксид кальция		2 054
5	Spanish (es) Óxido de calcio		1 543
6	Portuguese (pt) Cal		1 206
7	Chinese (zh) 氧化鈣		819
8	Italian (it) Ossido di calcio		658
9	Polish (pl) Tlenek wapnia		639
10	French (fr) Oxyde de calcium		609

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

#	Language	AI award	Relative AI
1	English (en) Calcium oxide		330
2	German (de) Calciumoxid		169
3	Spanish (es) Óxido de calcio		135
4	Russian (ru) Оксид кальция		86
5	Dutch (nl) Calciumoxide		69
6	Portuguese (pt) Cal		69
7	Hebrew (he) סיד		63
8	Italian (it) Ossido di calcio		61
9	Japanese (ja) 酸化カルシウム		52
10	Hungarian (hu) Kalcium-oxid		49

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) Calcium oxide		4
2	Basque (eu) Kare		1
3	Galician (gl) Cal		1
4	Russian (ru) Оксид кальция		1
5	Tamil (ta) கால்சியம் ஆக்சைடு		1
6	Vietnamese (vi) Calci oxide		1
7	Arabic (ar) أكسيد الكالسيوم		0
8	Azerbaijani (az) Kalsium-oksid		0
9	Bulgarian (bg) Калциев оксид		0
10	Catalan (ca) Òxid de calci		0

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

On 1 July 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: 2026 FIFA World Cup, Kylian Mbappé, Erling Haaland, Democratic Republic of the Congo, FIFA World Cup, Harry Kane, Romelu Lukaku, Senegal, Michael Olise, Sadio Mané.

In English Wikipedia the most popular articles on that day were: 2026 FIFA World Cup, Harry Kane, Julián Quiñones, List of FIFA World Cup top goalscorers, Kylian Mbappé, Democratic Republic of the Congo, Erling Haaland, DR Congo national football team, Melat Kiros, FIFA World Cup.

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 50 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2026. When calculating current popularity and AI of articles data from June 2026 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2026... More information