| Sıra | Seri | Kulvar | Ad | Ülke | Derece | Not |
| 1 | 5 | 4 | Sun Yang | Çin | 1:45.75 | Q |
| 2 | 4 | 4 | Biedermann, PaulPaul Biedermann | Almanya | 1:45.78 | Q |
| 3 | 5 | 6 | le Clos, ChadChad le Clos | Güney Afrika | 1:45.89 | Q |
| 4 | 6 | 3 | Dwyer, ConorConor Dwyer | Amerika Birleşik Devletleri | 1:45.95 | Q |
| 5 | 4 | 5 | Haas, TownleyTownley Haas | Amerika Birleşik Devletleri | 1:46.13 | Q |
| 6 | 4 | Guy, JamesJames Guy | Büyük Britanya | Q |
| 7 | 6 | 5 | Hagino, KosukeKosuke Hagino | Japonya | 1:46.19 | Q |
| 8 | 5 | 3 | Verschuren, SebastiaanSebastiaan Verschuren | Hollanda | 1:46.32 | Q |
| 9 | 5 | 5 | Fraser-Holmes, ThomasThomas Fraser-Holmes | Avustralya | 1:46.49 | Q |
| 10 | 6 | 6 | Stjepanovic, VelimirVelimir Stjepanovic | Sırbistan | 1:46.64 | Q |
| 11 | 4 | 6 | Stravius, JérémyJérémy Stravius | Fransa | 1:46.67 | ƒ |
| 12 | 4 | 8 | Kozma, DominikDominik Kozma | Macaristan | 1:46.68 | Q |
| 13 | 5 | 7 | Brown, MylesMyles Brown | Güney Afrika | 1:46.78 | Q |
| 14 | 2 | 4 | Quintero, CristianCristian Quintero | Venezuela | 1:47.02 | Q |
| 15 | 5 | 1 | Majchrzak, KacperKacper Majchrzak | Polonya | 1:47.12 | Q |
| 16 | 6 | 7 | Krasnıh, AleksandrAleksandr Krasnıh | Rusya | 1:47.15 | Q |
| 17 | 4 | 7 | Surgeloose, GlennGlenn Surgeloose | Belçika | 1:47.19 | Q |
| 18 | 3 | 6 | Auboeck, FelixFelix Auboeck | Avusturya | 1:47.24 | |
| 19 | 4 | 3 | Agnel, YannickYannick Agnel | Fransa | 1:47.35 | |
| 20 | 3 | 7 | Stanley, MatthewMatthew Stanley | Yeni Zelanda | 1:47.37 | |
| 21 | 6 | 8 | Koski, MatiasMatias Koski | Finlandiya | 1:47.40 | |
| 22 | 3 | 4 | Grabich, FedericoFederico Grabich | Arjantin | 1:47.41 | |
| 23 | 3 | 3 | D'Arrigo, AndreaAndrea D'Arrigo | İtalya | 1:47.46 | |
| 24 | 3 | 8 | El-Kamash, MarwanMarwan El-Kamash | Mısır | 1:47.52 | |
| 25 | 4 | 2 | de Lucca, JoãoJoão de Lucca | Brezilya | 1:47.63 | |
| 26 | 3 | 2 | Sim, WelsonWelson Sim | Malezya | 1:47.67 | |
| 27 | 6 | 1 | Dreesens, DionDion Dreesens | Hollanda | 1:47.76 | |
| 28 | 5 | 8 | Fildebrandt, ChristophChristoph Fildebrandt | Almanya | 1:47.81 | |
| 29 | 6 | 2 | Park Tae-hwan | Güney Kore | 1:48.06 | |
| 30 | 5 | 2 | McKeon, DavidDavid McKeon | Avustralya | 1:48.38 | |
| 31 | 1 | 4 | Baqlah, Ghetrich KhaderGhetrich Khader Baqlah | Ürdün | 1:48.42 | |
| 32 | 2 | 6 | Keyuan Shang | Çin | 1:48.46 | |
| 33 | 2 | 5 | Belotti, MarcoMarco Belotti | İtalya | 1:48.71 | |
| 34 | 1 | 3 | Sancov, AlexeiAlexei Sancov | Moldova | 1:48.85 | |
| 35 | 2 | 3 | Kurle, CamCam Kurle | Büyük Britanya | 1:49.08 | |
| 36 | 3 | 1 | Lobintsev, NikitaNikita Lobintsev | Rusya | 1:49.35 | |
| 37 | 3 | 5 | Bernek, PeterPeter Bernek | Macaristan | 1:49.73 | |
| 38 | 2 | 2 | Haldemann, AlexandreAlexandre Haldemann | İsviçre | 1:49.94 | |
| 39 | 1 | 5 | Tavcar, AnzeAnze Tavcar | Slovenya | 1:49.96 | |
| 40 | 2 | 1 | Christiansen, HenrikHenrik Christiansen | Norveç | 1:50.09 | |
| 41 | 2 | 7 | Hoang, PhuocPhuoc Hoang | Vietnam | 1:50.39 | |
| 2 | 8 | Mathlouthi, AhmedAhmed Mathlouthi | Tunus | |
| 43 | 1 | 6 | Acosta, MarceloMarcelo Acosta | El Salvador | 1:51.46 | |
| 44 | 1 | 7 | Mascoll-Gomes, NoahNoah Mascoll-Gomes | Antigua ve Barbuda | 1:53.16 | |
| 45 | 1 | 2 | Schreuders, MikelMikel Schreuders | Aruba | 1:55.10 | |
| 46 | 1 | 1 | Schuster, BrandonBrandon Schuster | Samoa | 1:57.72 | |
| 47 | 1 | 8 | Gebrel, AhmedAhmed Gebrel | Filistin | 1:59.71 | |
| - | 4 | 1 | Oliveira, NicolasNicolas Oliveira | Brezilya | DNS | |