The Men's 100 metre butterfly competition of the 2018 FINA World Swimming Championships (25 m) was held on 12 and 13 December 2018 at the Hangzhou Olympic Sports Center.

Records Prior to the competition, the existing world and championship records were as follows. Name Nation Time Location DateWorld recordChad le Clos48.08Windsor8 December 2016Championship recordChad le Clos48.08Windsor8 December 2016

Results Heats The heats were started at 10:33. Rank Heat Lane Name Nationality Time Notes 1 6 6 Caeleb Dressel 49.23 Q 2 8 4 Chad le Clos 49.34 Q 3 8 3 Marius Kusch 49.54 Q 4 6 5 Piero Codia 50.07 Q 5 8 1 Jack Conger 50.20 Q 6 8 5 Li Zhuhao 50.29 Q 7 6 4 Takeshi Kawamoto 50.34 Q 8 7 5 Mehdy Metella 50.42 Q 9 7 3 Yauhen Tsurkin 50.58 Q 10 7 2 Kengo Ida 50.74 Q 11 8 6 Aleksandr Kharlanov 50.99 Q 12 8 7 Tomoe Zenimoto Hvas 51.04 Q 13 7 6 Roman Shevliakov 51.21 Q 14 6 0 Deividas Margevičius 51.25 Q 15 6 3 Konrad Czerniak 51.28 Q 16 8 0 Liubomyr Lemeshko 51.35 Q 17 6 2 Umitcan Gures 51.41 17 8 2 Hryhory Pekarski 51.41 19 4 3 Adilbek Mussin 51.50 20 5 5 Brendan Hyland 51.54 20 7 1 Nic Brown 51.54 22 6 7 Ryan Coetzee 51.65 23 6 8 Leonardo de Deus 51.69 24 7 8 Shen Jiahao 51.73 25 5 2 Antani Ivanov 51.81 26 6 1 Riku Pöytäkivi 51.90 27 7 9 Sajan Prakash 51.97 28 5 6 Ben Hockin 52.13 29 7 0 Hugo González 52.28 30 8 8 Emmanuel Vanluchene 52.30 31 7 7 Kregor Zirk 52.32 32 5 0 Esnaider Reales 52.43 33 5 7 Adam Halas 52.50 34 6 9 Sascha Subarsky 52.53 35 5 3 Bradlee Ashby 52.57 36 5 1 Daniel Martin 52.62 37 5 9 Cadell Lyons 52.91 37 8 9 Wang Kuan-hung 52.91 39 4 4 Alexandre Perreault 53.40 40 4 1 Nicholas Lim 53.49 41 2 0 Philip Adejumo 53.62 NR 42 5 8 Julien Henx 53.80 43 5 4 Cherantha de Silva 54.21 44 4 0 Seggio Bernardina 54.25 45 4 2 Gabriel Araya 54.37 46 4 5 Ralph Goveia 54.42 47 4 9 Siwat Matangkapong 54.75 48 4 8 Vladislav Shuliko 55.43 NR 49 4 6 Ayman Kelzi 55.53 50 2 9 Md Mahamudun Nobi Nahid 56.04 51 3 4 Yacob Al-Khulaifi 56.25 51 4 7 N'Nhyn Fernander 56.25 53 1 2 Ali Alkaabi 56.77 54 3 3 Chase Onorati 57.00 55 1 7 Mohammed Isam Sadeq Kazan 57.13 56 3 8 Zeniel Guzmán 57.57 57 3 1 Jayhan Odlum-Smith 57.64 58 3 6 Yousif Bu-Arish 57.84 59 3 0 Fernando Ponce 57.90 60 3 9 Dajenel Williams 58.22 61 2 4 Collins Saliboko 58.39 62 3 5 Davidson Vincent 58.41 63 3 7 Ridhwan Abubakar 58.61 64 3 2 Isiaka Irankunda 58.63 65 2 5 Troy Pina 59.18 66 1 8 Bernat Lomero 59.55 67 2 3 Dion Kadriu 59.96 68 1 3 Belly-Cresus Ganira 59.99 69 1 5 Abdulla Essa Ahmed Ali Yusuf 70 2 8 Anubhav Subba 71 2 6 Ousmane Touré 72 2 2 Simanga Dlamini 73 1 6 Fakhriddin Madkamov 74 2 1 Ratha Phin 75 2 7 Nelson Batallones 76 1 1 Achala Gekabel 77 1 4 Albachir Mouctar 7 4 Matteo Rivolta

Semifinals The semifinals were held at 20:22.Semifinals results

Semifinal 1 Rank Lane Name Nationality Time Notes 1 4 Chad le Clos 49.07 Q 2 3 Li Zhuhao 49.36 Q, AS 3 6 Mehdy Metella 49.77 Q 4 5 Piero Codia 50.23 Q 5 7 Tomoe Zenimoto Hvas 50.49 WJ 6 2 Kengo Ida 50.54 7 1 Deividas Margevičius 50.95 8 8 Liubomyr Lemeshko 51.53

Semifinal 2 Rank Lane Name Nationality Time Notes 1 4 Caeleb Dressel 48.93 Q 2 5 Marius Kusch 49.35 Q 3 6 Takeshi Kawamoto 49.94 Q 4 3 Jack Conger 50.41 Q 5 7 Aleksandr Kharlanov 50.76 6 2 Yauhen Tsurkin 50.77 7 1 Roman Shevliakov 50.94 8 8 Konrad Czerniak 51.18

Final The final was held at 20:00.Final results

Rank Lane Name Nationality Time Notes 5 Chad le Clos 48.50 4 Caeleb Dressel 48.71 6 Li Zhuhao 49.25 AS 4 2 Mehdy Metella 49.45 5 3 Marius Kusch 49.50 6 7 Takeshi Kawamoto 50.07 7 8 Jack Conger 50.32 8 1 Piero Codia 50.71

References