Rang | Serie | Baan | Naam | Land | Tijd | Bijz. |
1 | 6 | 4 | Dressel, Caeleb Caeleb Dressel | Verenigde Staten | 50.08 | Q |
2 | 6 | 3 | Codia, Piero Piero Codia | Italië | 51.09 | Q |
3 | 7 | 6 | Guy, James James Guy | Verenigd Koninkrijk | 51.16 | Q |
4 | 8 | 4 | Schooling, Joseph Joseph Schooling | Singapore | 51.21 | Q |
5 | 8 | 6 | Milák, Kristóf Kristóf Milák | Hongarije | 51.23 | Q |
6 | 8 | 5 | le Clos, Chad Chad le Clos | Zuid-Afrika | 51.28 | Q |
7 | 7 | 3 | Metella, Mehdy Mehdy Metella | Frankrijk | 51.46 | Q |
8 | 6 | 6 | Martins, Henrique Henrique Martins | Brazilië | 51.48 | Q |
9 | 7 | 5 | Czerniak, Konrad Konrad Czerniak | Polen | 51.50 | Q |
10 | 7 | 4 | László Cseh | Hongarije | 51.55 | Q |
11 | 6 | 5 | Li Zhuhao | China | 51.62 | Q |
12 | 7 | 2 | Irvine, Grant Grant Irvine | Australië | 51.67 | Q |
13 | 6 | 7 | Świtkowski, Jan Jan Świtkowski | Polen | 51.82 | Q |
14 | 8 | 8 | Popkov, Aleksandr Aleksandr Popkov | Rusland | 51.84 | Q |
15 | 8 | 2 | Morgan, David David Morgan | Australië | 51.90 | Q |
16 | 8 | 3 | Phillips, Tim Tim Phillips | Verenigde Staten | 51.96 | Q |
17 | 7 | 0 | Goosen, Mathys Mathys Goosen | Nederland | 52.12 | |
18 | 8 | 1 | Quah Zheng Wen | Singapore | 52.13 | |
19 | 5 | 6 | Sabo, Sebastian Sebastian Sabo | Servië | 52.16 | |
20 | 7 | 7 | Kobori, Yuki Yuki Kobori | Japan | 52.17 | |
21 | 7 | 8 | Martínez, Luis Luis Martínez | Guatemala | 52.18 | |
22 | 6 | 2 | Kusch, Marius Marius Kusch | Duitsland | 52.22 | |
23 | 7 | 1 | Pachomov, Daniil Daniil Pachomov | Rusland | 52.47 | |
24 | 4 | 1 | Ayar, Kaan Kaan Ayar | Turkije | 52.52 | |
25 | 6 | 1 | Grassi, Santiago Santiago Grassi | Argentinië | 52.59 | |
26 | 5 | 2 | Šefl, Jan Jan Šefl | Tsjechië | 52.65 | |
27 | 5 | 0 | Croenen, Louis Louis Croenen | België | 52.74 | |
28 | 7 | 9 | Carter, Dylan Dylan Carter | Trinidad en Tobago | 52.75 | |
29 | 8 | 7 | Sankovitsj, Pavel Pavel Sankovitsj | Wit-Rusland | 52.87 | |
30 | 6 | 9 | Vazaios, Andreas Andreas Vazaios | Griekenland | 52.88 | |
31 | 4 | 2 | Kozljoek, Artjom Artjom Kozljoek | Oezbekistan | 52.95 | |
32 | 6 | 8 | Lemesjko, Ljoebomyr Ljoebomyr Lemesjko | Oekraïne | 52.97 | |
33 | 6 | 0 | Bromer, Viktor Viktor Bromer | Denemarken | 53.01 | |
34 | 5 | 3 | Binnema, Josiah Josiah Binnema | Canada | 53.10 | |
35 | 8 | 0 | Carini, Giacomo Giacomo Carini | Italië | 53.13 | |
36 | 8 | 9 | Schlesinger, Marcus Marcus Schlesinger | Israël | 53.20 | |
37 | 4 | 4 | Moessin, Adilbek Adilbek Moessin | Kazachstan | 53.37 | |
38 | 4 | 3 | Liess, Nils Nils Liess | Zwitserland | 53.50 | |
39 | 4 | 7 | Hockin, Ben Ben Hockin | Paraguay | 53.51 | |
40 | 4 | 0 | Pöytäkivi, Riku Riku Pöytäkivi | Finland | 53.62 | |
41 | 5 | 1 | Ivanov, Antani Antani Ivanov | Bulgarije | 53.66 | |
41 | 5 | 4 | Sidiq, Triady Fauzi Triady Fauzi Sidiq | Indonesië | 53.66 | |
43 | 5 | 5 | Zirk, Kregor Kregor Zirk | Estland | 53.70 | |
44 | 5 | 9 | Hyland, Brendan Brendan Hyland | Ierland | 53.80 | |
45 | 4 | 8 | Lavado, Marcos Marcos Lavado | Venezuela | 53.97 | |
45 | 5 | 7 | Duškinas, Tadas Tadas Duškinas | Litouwen | 53.97 | |
47 | 3 | 2 | Chou Wei-liang | Chinees Taipei | 54.31 | |
48 | 3 | 3 | Prakash, Sajan Sajan Prakash | India | 54.46 | |
49 | 3 | 4 | Arias, David David Arias | Colombia | 54.48 | |
50 | 4 | 9 | Martínez, José José Martínez | Mexico | 54.50 | |
51 | 5 | 8 | Eissa, Omar Omar Eissa | Egypte | 54.59 | |
52 | 4 | 5 | Hoàng Quý Phước | Vietnam | 54.76 | |
53 | 3 | 5 | Goveia, Ralph Ralph Goveia | Zambia | 54.86 | |
54 | 3 | 7 | Sperandio Sánchez, Christian Christian Sperandio Sánchez | Dominicaanse Republiek | 54.98 | |
55 | 3 | 6 | de Silva , Cherantha Cherantha de Silva | Sri Lanka | 55.09 | |
56 | 3 | 0 | Ansari, Mehdi Mehdi Ansari | Iran | 55.31 | |
57 | 2 | 4 | Umnov, Mikhail Mikhail Umnov | Malta | 55.58 | |
58 | 3 | 9 | Anis, Rami Rami Anis | Onafhankelijke atleten | 55.66 | |
59 | 3 | 8 | Alvarez, Bryan Bryan Alvarez | Costa Rica | 55.85 | |
60 | 3 | 1 | Kelzi, Ayman Ayman Kelzi | Syrië | 56.59 | |
61 | 2 | 3 | Soammanus, Jeerakit Jeerakit Soammanus | Thailand | 56.88 | |
62 | 2 | 5 | Toure, Oumar Oumar Toure | Mali | 57.52 | |
63 | 2 | 1 | Nmor, Ifeakachuku Ifeakachuku Nmor | Nigeria | 57.90 | |
64 | 1 | 3 | Al-Doori, Abdullah Abdullah Al-Doori | Irak | 58.01 | |
65 | 2 | 2 | Jabbour, George George Jabbour | Honduras | 58.29 | |
66 | 1 | 5 | Al-Khulaifi, Yacob Yacob Al-Khulaifi | Qatar | 58.42 | |
67 | 2 | 6 | Gaskin, Hannibal Hannibal Gaskin | Guyana | 58.69 | |
68 | 1 | 4 | Francisco, Daniel Daniel Francisco | Angola | 58.79 | |
69 | 1 | 6 | Poppe, Tanner Tanner Poppe | Guam | 1:03.28 | |
70 | 2 | 9 | Dlamini, Simanga Simanga Dlamini | Swaziland | 1:04.02 | |
71 | 2 | 7 | Roberto, David David Roberto | Noordelijke Marianen | 1:06.80 | |
72 | 2 | 0 | Gooding, Dillon Dillon Gooding | Saint Vincent en de Grenadines | 1:07.11 | |
| 4 | 6 | Perry, Sam Sam Perry | Nieuw-Zeeland | DNS |