Heats
mercredi 12 décembre 2018, 03h33 GMT – 03h33 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Caeleb Dressel | United States | 49.23″ |
| 2 |  Chad Le Clos | South Africa | + 0.11″ |
| 3 |  Marius Kusch | Germany | + 0.31″ |
| 4 |  Piero Codia | Italy | + 0.84″ |
| 5 | Jack Conger | United States | + 0.97″ |
| 6 | Zhuhao Li | China | + 1.06″ |
| 7 |  Takeshi Kawamoto | Japan | + 1.11″ |
| 8 |  Mehdy Metella | France | + 1.19″ |
| 9 |  Yauhen Tsurkin | Belarus | + 1.35″ |
| 10 | Kengo Ida | Japan | + 1.51″ |
| 11 | Aleksandr Kharlanov | Russia | + 1.76″ |
| 12 | Tomoe Zenimoto Hvas | Norway | + 1.81″ |
| 13 | Roman Shevlyakov | Russia | + 1.98″ |
| 14 |  Deividas Margevicius | Lithuania | + 2.02″ |
| 15 |  Konrad Czerniak | Poland | + 2.05″ |
| 16 | Liubomyr Lemeshko | Ukraine | + 2.12″ |
| 17 | Hryhory Pekarski | Belarus | + 2.18″ |
| 18 |  Ümit Can Güres | Turkey | + 2.18″ |
| 19 | Adilbek Mussin | Kazakhstan | + 2.27″ |
| 20 |  Brendan Hyland | Ireland | + 2.31″ |
| 20 | Nic Brown | Australia | + 2.31″ |
| 22 | Ryan Coetzee | South Africa | + 2.42″ |
| 23 |  Leonardo de Deus | Brazil | + 2.46″ |
| 24 | Jiahao Shen | China | + 2.5″ |
| 25 | Antani Ivanov | Bulgaria | + 2.58″ |
| 26 | Riku Pöytäkivi | Finland | + 2.67″ |
| 27 | Sajan Prakash | India | + 2.74″ |
| 28 | Benjamín Hockin | Paraguay | + 2.9″ |
| 29 | Hugo González | Spain | + 3.05″ |
| 30 | Emmanuel Vanluchene | Belgium | + 3.07″ |
| 31 | Kregor Zirk | Estonia | + 3.09″ |
| 32 | Esnaider Reales | Colombia | + 3.2″ |
| 33 | Adam Halas | Slovakia | + 3.27″ |
| 34 | Sascha Subarsky | Austria | + 3.3″ |
| 35 | Bradlee Ashby | New Zealand | + 3.34″ |
| 36 | Daniel-Cristian Martin | Romania | + 3.39″ |
| 37 | Kuan-Hung Wang | Chinese Taipei | + 3.68″ |
| 37 | Cadell Lyons | Trinidad & Tobago | + 3.68″ |
| 39 | Alexandre Perreault | Canada | + 4.17″ |
| 40 | Nicholas Lim | Hong Kong, China | + 4.26″ |
| 41 | Philip Adejumo | Nigeria | + 4.39″ |
| 42 | Julien Henx | Luxembourg | + 4.57″ |
| 43 | Cherantha De Silva | Sri Lanka | + 4.98″ |
| 44 | Seggio Bernardina | Curaçao | + 5.02″ |
| 45 | Gabriel Araya | Chile | + 5.14″ |
| 46 | Ralph Goveia | Zambia | + 5.19″ |
| 47 | Siwat Matangkapong | Thailand | + 5.52″ |
| 48 | Vladislav Shuliko | Kyrgyzstan | + 6.2″ |
| 49 | Ayman Klzie | Syria | + 6.3″ |
| 50 | Md Mahamudun Nobi Nahid | Bangladesh | + 6.81″ |
| 51 | Yacob Al-Khulaifi | Qatar | + 7.02″ |
| 51 | N'Nhyn Fernander | Bahamas | + 7.02″ |
| 53 | Ali Alkaabi | United Arab Emirates | + 7.54″ |
| 54 | Chase Onorati | Zimbabwe | + 7.77″ |
| 55 | Mohammed Kazan | Iraq | + 7.9″ |
| 56 | Zeniel Guzmán | Dominican Republic | + 8.34″ |
| 57 | Jayhan Odlum-Smith | St. Lucia | + 8.41″ |
| 58 | Yousif Bu Arish | Saudi Arabia | + 8.61″ |
| 59 | Fernando Ponce | Guatemala | + 8.67″ |
| 60 | Dajenel Williams | Grenada | + 8.99″ |
| 61 | Collins Saliboko | Tanzania | + 9.16″ |
| 62 | Davidson Vincent | Haiti | + 9.18″ |
| 63 | Ridhwan Mohamed | Kenya | + 9.38″ |
| 64 | Isiaka Irankunda | Rwanda | + 9.4″ |
| 65 | Troy Pina | Cape Verde | + 9.95″ |
| 66 | Bernat Lomero | Andorra | + 10.32″ |
| 67 | Dion Kadriu | Kosovo | + 10.73″ |
| 68 | Belly-Cresus Ganira | Burundi | + 10.76″ |
| 69 | Abdulla Yusuf | Bahrain | + 11″ |
| 70 | Anubhav Subba | Nepal | + 11.78″ |
| 71 | Ousmane Touré | Mali | + 12.53″ |
| 72 | Simanga Dlamini | Eswatini | + 13.51″ |
| 73 | Fakhriddin Madkamov | Tajikistan | + 14.63″ |
| 74 | Ratha Phin | Cambodia | + 15.3″ |
| 75 | Nelson Batallones | Northern Mariana Islands | + 15.92″ |
| 76 | Achala Gekabel | Ethiopia | + 17.59″ |
| 77 | Albachir Mouctar | Niger | + 25.86″ |
| Matteo Rivolta | Italy | DQ |