U-138

pt

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U-138

Quality:

U-138 - 1940 Type IID submarine. Article “U-138” in Portuguese Wikipedia has 24 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-138”, its content was written by 5 registered users of Portuguese Wikipedia and edited by 121 registered Wikipedia users in all languages.

The article is cited 11 times in Portuguese Wikipedia and cited 1898 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (Portuguese): #26728 in November 2021
  • Global: #114922 in February 2010

The highest popularity rank from 2008:

  • Local (Portuguese): #261205 in June 2010
  • Global: #1185014 in April 2018

There are 13 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.

Languages with the highest quality

#LanguageQuality gradeQuality score
1Vietnamese (vi)
U-138 (tàu ngầm Đức) (1940)
35.9655
2Chinese (zh)
U-138号潜艇 (1940年)
32.746
3Ukrainian (uk)
U-138 (1940)
28.4682
4English (en)
German submarine U-138 (1940)
24.7054
5Portuguese (pt)
U-138
24.0181
6German (de)
U 138 (U-Boot, 1940)
15.6937
7Arabic (ar)
الغواصة الألمانية يو-138 (1940)
13.5349
8French (fr)
Unterseeboot 138 (1940)
10.7903
9Serbian (sr)
Немачка подморница У-138
7.1691
10Slovenian (sl)
U-138 (Kriegsmarine)
5.7016
More...

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

Most popular in all the time

The most popular language versions of the article "U-138" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
German submarine U-138 (1940)
37 449
2German (de)
U 138 (U-Boot, 1940)
16 686
3Russian (ru)
U-138 (1940)
12 895
4Polish (pl)
U-138 (1940)
6 322
5Portuguese (pt)
U-138
3 192
6French (fr)
Unterseeboot 138 (1940)
2 407
7Serbian (sr)
Немачка подморница У-138
1 784
8Slovenian (sl)
U-138 (Kriegsmarine)
1 639
9Chinese (zh)
U-138号潜艇 (1940年)
1 268
10Arabic (ar)
الغواصة الألمانية يو-138 (1940)
661
More...

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

Most popular in June 2025

The most popular language versions of the article "U-138" in June 2025
#LanguagePopularity awardRelative popularity
1English (en)
German submarine U-138 (1940)
161
2German (de)
U 138 (U-Boot, 1940)
113
3Russian (ru)
U-138 (1940)
31
4Chinese (zh)
U-138号潜艇 (1940年)
27
5Polish (pl)
U-138 (1940)
23
6Persian (fa)
او-۱۳۸ (کریگس‌مارینه)
16
7French (fr)
Unterseeboot 138 (1940)
14
8Ukrainian (uk)
U-138 (1940)
12
9Portuguese (pt)
U-138
7
10Slovenian (sl)
U-138 (Kriegsmarine)
6
More...

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

The highest AI

Language versions of the article "U-138" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1German (de)
U 138 (U-Boot, 1940)
42
2English (en)
German submarine U-138 (1940)
30
3French (fr)
Unterseeboot 138 (1940)
12
4Russian (ru)
U-138 (1940)
8
5Serbian (sr)
Немачка подморница У-138
6
6Polish (pl)
U-138 (1940)
5
7Portuguese (pt)
U-138
5
8Ukrainian (uk)
U-138 (1940)
4
9Persian (fa)
او-۱۳۸ (کریگس‌مارینه)
3
10Slovenian (sl)
U-138 (Kriegsmarine)
2
More...

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

The highest AI in June 2025

Language versions of the article "U-138" with the highest AI in June 2025
#LanguageAI awardRelative AI
1Arabic (ar)
الغواصة الألمانية يو-138 (1940)
0
2German (de)
U 138 (U-Boot, 1940)
0
3English (en)
German submarine U-138 (1940)
0
4Persian (fa)
او-۱۳۸ (کریگس‌مارینه)
0
5French (fr)
Unterseeboot 138 (1940)
0
6Polish (pl)
U-138 (1940)
0
7Portuguese (pt)
U-138
0
8Russian (ru)
U-138 (1940)
0
9Slovenian (sl)
U-138 (Kriegsmarine)
0
10Serbian (sr)
Немачка подморница У-138
0
More...

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

The highest CI

Language versions of the article "U-138" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1Arabic (ar)
الغواصة الألمانية يو-138 (1940)
1 149
2German (de)
U 138 (U-Boot, 1940)
260
3English (en)
German submarine U-138 (1940)
120
4French (fr)
Unterseeboot 138 (1940)
62
5Ukrainian (uk)
U-138 (1940)
61
6Russian (ru)
U-138 (1940)
56
7Vietnamese (vi)
U-138 (tàu ngầm Đức) (1940)
55
8Chinese (zh)
U-138号潜艇 (1940年)
55
9Polish (pl)
U-138 (1940)
30
10Slovenian (sl)
U-138 (Kriegsmarine)
24
More...

Scores

Estimated value for Wikipedia:
Portuguese:
Global:
Popularity in June 2025:
Portuguese:
Global:
Popularity in all years:
Portuguese:
Global:
Authors in June 2025:
Portuguese:
Global:
Registered authors in all years:
Portuguese:
Global:
Citations:
Portuguese:
Global:

Quality measures

Interwikis

#LanguageValue
arArabic
الغواصة الألمانية يو-138 (1940)
deGerman
U 138 (U-Boot, 1940)
enEnglish
German submarine U-138 (1940)
faPersian
او-۱۳۸ (کریگس‌مارینه)
frFrench
Unterseeboot 138 (1940)
plPolish
U-138 (1940)
ptPortuguese
U-138
ruRussian
U-138 (1940)
slSlovenian
U-138 (Kriegsmarine)
srSerbian
Немачка подморница У-138
ukUkrainian
U-138 (1940)
viVietnamese
U-138 (tàu ngầm Đức) (1940)
zhChinese
U-138号潜艇 (1940年)

Popularity rank trends

Best Rank Portuguese:
#261205
06.2010
Global:
#1185014
04.2018

AI rank trends

Best Rank Portuguese:
#26728
11.2021
Global:
#114922
02.2010

Languages comparison

Important global interconnections (July 2024 – June 2025)

Wikipedia readers most often find their way to information on U-138 from Wikipedia articles about Type II submarine, Wolfgang Lüth, U-137, SS Runic and List of U-boats of Germany. Whereas reading the article about U-138 people most often go to Wikipedia articles on U-139, Type II submarine, List of shipwrecks in September 1940, Wolfgang Lüth and Peter Lohmeyer.

Cumulative results of quality and popularity of the Wikipedia article

List of Wikipedia articles in different languages (starting with the most popular):

pt: U-138

News from 15 February 2026

On 15 February 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: Jeffrey Epstein, Wuthering Heights, 2026 Winter Olympics, Epstein files, Ilia Malinin, Wuthering Heights, Ghislaine Maxwell, Lucas Pinheiro Braathen, 2026 Winter Olympics medal table, Valentine's Day.

In Portuguese Wikipedia the most popular articles on that day were: Lucas Pinheiro Braathen, Jeffrey Epstein, Isadora Cruz, Shawn Mendes, Maria Quitéria, Arquivos de Epstein, Dia dos Namorados, Léa Garcia, Margaret Thatcher, Trace Brasil.

About WikiRank

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