U-581

U-581 - 1941 Type VIIC submarine. Article “U-581” in Portuguese Wikipedia has 19.4 points for quality (as of July 1, 2025). The article contains 7 references and 5 sections.

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

Since the creation of article “U-581”, its content was written by 2 registered users of Portuguese Wikipedia and edited by 96 registered Wikipedia users in all languages.

The article is cited 575 times in Portuguese Wikipedia and cited 5124 times in all languages.

The highest Authors Interest rank from 2001:

• Local (Portuguese): #33326 in November 2021
• Global: #8328 in February 2017

The highest popularity rank from 2008:

• Local (Portuguese): #62251 in February 2017
• Global: #47853 in March 2017

There are 10 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	Vietnamese (vi) U-581 (tàu ngầm Đức)		43.9316
2	English (en) German submarine U-581		27.1414
3	German (de) U 581		19.6689
4	Portuguese (pt) U-581		19.3643
5	Arabic (ar) الغواصة الألمانية يو-581		18.6195
6	Ukrainian (uk) U-581		17.083
7	French (fr) Unterseeboot 581		11.6052
8	Slovenian (sl) U-581		6.8233
9	Polish (pl) U-581		3.855
10	Persian (fa) زیردریایی یو-۵۸۱		1.2386

More...

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

The most popular language versions of the article "U-581" in all the time

#	Language	Popularity award	Relative popularity
1	German (de) U 581		76 771
2	English (en) German submarine U-581		38 262
3	Polish (pl) U-581		5 405
4	Portuguese (pt) U-581		2 707
5	French (fr) Unterseeboot 581		1 642
6	Slovenian (sl) U-581		777
7	Arabic (ar) الغواصة الألمانية يو-581		739
8	Ukrainian (uk) U-581		282
9	Persian (fa) زیردریایی یو-۵۸۱		193
10	Vietnamese (vi) U-581 (tàu ngầm Đức)		90

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

The most popular language versions of the article "U-581" in June 2025

#	Language	Popularity award	Relative popularity
1	English (en) German submarine U-581		118
2	German (de) U 581		76
3	Vietnamese (vi) U-581 (tàu ngầm Đức)		29
4	French (fr) Unterseeboot 581		9
5	Polish (pl) U-581		7
6	Arabic (ar) الغواصة الألمانية يو-581		6
7	Portuguese (pt) U-581		6
8	Slovenian (sl) U-581		4
9	Ukrainian (uk) U-581		4
10	Persian (fa) زیردریایی یو-۵۸۱		2

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

Language versions of the article "U-581" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	German (de) U 581		31
2	English (en) German submarine U-581		27
3	French (fr) Unterseeboot 581		11
4	Polish (pl) U-581		8
5	Ukrainian (uk) U-581		6
6	Arabic (ar) الغواصة الألمانية يو-581		4
7	Persian (fa) زیردریایی یو-۵۸۱		4
8	Portuguese (pt) U-581		2
9	Slovenian (sl) U-581		2
10	Vietnamese (vi) U-581 (tàu ngầm Đức)		1

More...

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

Language versions of the article "U-581" with the highest AI in June 2025

#	Language	AI award	Relative AI
1	Vietnamese (vi) U-581 (tàu ngầm Đức)		1
2	Arabic (ar) الغواصة الألمانية يو-581		0
3	German (de) U 581		0
4	English (en) German submarine U-581		0
5	Persian (fa) زیردریایی یو-۵۸۱		0
6	French (fr) Unterseeboot 581		0
7	Polish (pl) U-581		0
8	Portuguese (pt) U-581		0
9	Slovenian (sl) U-581		0
10	Ukrainian (uk) U-581		0

More...

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

Language versions of the article "U-581" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	Arabic (ar) الغواصة الألمانية يو-581		1 152
2	English (en) German submarine U-581		795
3	French (fr) Unterseeboot 581		712
4	Ukrainian (uk) U-581		650
5	Slovenian (sl) U-581		586
6	Portuguese (pt) U-581		575
7	Vietnamese (vi) U-581 (tàu ngầm Đức)		356
8	Polish (pl) U-581		158
9	German (de) U 581		131
10	Persian (fa) زیردریایی یو-۵۸۱		9

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#	Language	Value
ar	Arabic الغواصة الألمانية يو-581
de	German U 581
en	English German submarine U-581
fa	Persian زیردریایی یو-۵۸۱
fr	French Unterseeboot 581
pl	Polish U-581
pt	Portuguese U-581
sl	Slovenian U-581
uk	Ukrainian U-581
vi	Vietnamese U-581 (tàu ngầm Đức)

Best Rank

Portuguese: #62251 02.2017

Global: #47853 03.2017

Best Rank

Portuguese: #33326 11.2021

Global: #8328 02.2017

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In Portuguese Wikipedia the most popular articles on that day were: Roger Machado, Daniel Vorcaro, Fotos dos Mamonas Assassinas mortos, António José Seguro, Heeseung, Enhypen, Andrew Tate, Jeffrey Epstein, Assassinatos de Liana Friedenbach e Felipe Caffé, Margarida Maldonado Freitas.

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