U-551

U-551 - 1940 Type VIIC submarine. Article “U-551” in Portuguese Wikipedia has 23.3 points for quality (as of July 1, 2025). The article contains 8 references and 7 sections.

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

Since the creation of article “U-551”, its content was written by 5 registered users of Portuguese Wikipedia and edited by 87 registered Wikipedia users in all languages.

The article is cited 574 times in Portuguese Wikipedia and cited 5070 times in all languages.

The highest Authors Interest rank from 2001:

• Local (Portuguese): #29320 in November 2021
• Global: #152647 in January 2009

The highest popularity rank from 2008:

• Local (Portuguese): #293319 in April 2014
• Global: #713104 in October 2023

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	Polish (pl) U-551		45.405
2	Vietnamese (vi) U-551 (tàu ngầm Đức)		39.2139
3	English (en) German submarine U-551		23.6796
4	Portuguese (pt) U-551		23.2753
5	German (de) U 551		21.5724
6	Arabic (ar) الغواصة الألمانية يو-551		21.4735
7	Ukrainian (uk) U-551		12.7977
8	French (fr) Unterseeboot 551		10.5336
9	Slovenian (sl) U-551		6.8665
10	Persian (fa) زیردریایی یو-۵۵۱		1.241

More...

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

The most popular language versions of the article "U-551" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) German submarine U-551		33 742
2	German (de) U 551		24 970
3	Polish (pl) U-551		3 627
4	Portuguese (pt) U-551		2 868
5	French (fr) Unterseeboot 551		1 469
6	Slovenian (sl) U-551		893
7	Arabic (ar) الغواصة الألمانية يو-551		371
8	Ukrainian (uk) U-551		351
9	Persian (fa) زیردریایی یو-۵۵۱		199
10	Vietnamese (vi) U-551 (tàu ngầm Đức)		96

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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-551" in June 2025

#	Language	Popularity award	Relative popularity
1	English (en) German submarine U-551		121
2	German (de) U 551		55
3	French (fr) Unterseeboot 551		15
4	Vietnamese (vi) U-551 (tàu ngầm Đức)		15
5	Polish (pl) U-551		14
6	Portuguese (pt) U-551		12
7	Slovenian (sl) U-551		4
8	Ukrainian (uk) U-551		4
9	Arabic (ar) الغواصة الألمانية يو-551		2
10	Persian (fa) زیردریایی یو-۵۵۱		1

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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-551" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	English (en) German submarine U-551		31
2	German (de) U 551		24
3	French (fr) Unterseeboot 551		11
4	Portuguese (pt) U-551		5
5	Ukrainian (uk) U-551		5
6	Persian (fa) زیردریایی یو-۵۵۱		4
7	Polish (pl) U-551		4
8	Arabic (ar) الغواصة الألمانية يو-551		1
9	Slovenian (sl) U-551		1
10	Vietnamese (vi) U-551 (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-551" with the highest AI in June 2025

#	Language	AI award	Relative AI
1	Vietnamese (vi) U-551 (tàu ngầm Đức)		1
2	Arabic (ar) الغواصة الألمانية يو-551		0
3	German (de) U 551		0
4	English (en) German submarine U-551		0
5	Persian (fa) زیردریایی یو-۵۵۱		0
6	French (fr) Unterseeboot 551		0
7	Polish (pl) U-551		0
8	Portuguese (pt) U-551		0
9	Slovenian (sl) U-551		0
10	Ukrainian (uk) U-551		0

More...

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

Language versions of the article "U-551" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	Arabic (ar) الغواصة الألمانية يو-551		1 152
2	English (en) German submarine U-551		743
3	French (fr) Unterseeboot 551		712
4	Ukrainian (uk) U-551		648
5	Slovenian (sl) U-551		585
6	Portuguese (pt) U-551		574
7	Vietnamese (vi) U-551 (tàu ngầm Đức)		355
8	Polish (pl) U-551		157
9	German (de) U 551		129
10	Persian (fa) زیردریایی یو-۵۵۱		15

More...

#	Language	Value
ar	Arabic الغواصة الألمانية يو-551
de	German U 551
en	English German submarine U-551
fa	Persian زیردریایی یو-۵۵۱
fr	French Unterseeboot 551
pl	Polish U-551
pt	Portuguese U-551
sl	Slovenian U-551
uk	Ukrainian U-551
vi	Vietnamese U-551 (tàu ngầm Đức)

Best Rank

Portuguese: #293319 04.2014

Global: #713104 10.2023

Best Rank

Portuguese: #29320 11.2021

Global: #152647 01.2009

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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