# Swimming at the 2018 Commonwealth Games – Men's 100 metre butterfly

The men's 100 metre butterfly event at the 2018 Commonwealth Games was held on 8 and 9 April at the Gold Coast Aquatic Centre.

## Records

Prior to this competition, the existing world, Commonwealth and Games records were as follows:
| World record | Michael Phelps (USA) | 49.82 | Rome, Italy | 1 August 2009 |
| Commonwealth record | Joseph Schooling (SGP) | 50.39 | Rio de Janeiro, Brazil | 12 August 2016 |
| Games record | Chad le Clos (RSA) | 51.29 | Glasgow, United Kingdom | 28 July 2014 |
The following records were established during the competition:
| Date | Event | Name | Nationality | Time | Record |
| 9 April | Final | Chad le Clos | South Africa | 50.65 | GR |

## Results
### Heats

The heats were held on 8 April at 11:35.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | 4 | James Guy | England | 53.16 | Q |
| 2 | 2 | 3 | Sean Campsie | Scotland | 53.31 | Q |
| 3 | 4 | 3 | Josiah Binnema | Canada | 53.49 | Q |
| 3 | 4 | 5 | David Morgan | Australia | 53.49 | Q |
| 5 | 2 | 4 | Chad Le Clos | South Africa | 53.67 | Q |
| 6 | 2 | 5 | Jacob Peters | England | 53.72 | Q |
| 7 | 2 | 6 | Mackenzie Darragh | Canada | 53.81 | Q |
| 8 | 3 | 4 | Grant Irvine | Australia | 53.89 | Q |
| 9 | 3 | 6 | Sajan Prakash | India | 54.11 | Q |
| 10 | 3 | 3 | Calum Jarvis | Wales | 54.26 | Q |
| 11 | 4 | 2 | Jie Chan | Malaysia | 54.33 | Q |
| 12 | 3 | 2 | Ralph Goveia | Zambia | 54.58 | Q |
| 13 | 3 | 1 | Abeiku Jackson | Ghana | 54.79 | Q |
| 14 | 3 | 5 | Ryan Coetzee | South Africa | 55.03 | Q |
| 15 | 2 | 2 | Eben Vorster | South Africa | 55.11 | Q |
| 16 | 4 | 1 | James Brown | Northern Ireland | 55.14 | Q |
| 17 | 3 | 7 | Igor Mogne | Mozambique | 55.20 | |
| 18 | 4 | 6 | Cherantha de Silva | Sri Lanka | 55.91 | |
| 19 | 3 | 8 | Harry Shalamon | Jersey | 56.24 | |
| 20 | 4 | 7 | Curtis Coulter | Northern Ireland | 56.57 | |
| 21 | 2 | 1 | Mohammad Nahid | Bangladesh | 56.94 | |
| 22 | 4 | 8 | Iain McCallum | Cayman Islands | 58.08 | |
| 23 | 2 | 8 | Stefano Mitchell | Antigua and Barbuda | 58.88 | |
| 24 | 1 | 3 | Epeli Rabua Herbert | Fiji | 58.91 | |
| 25 | 1 | 4 | Matt Savitz | Gibraltar | 59.56 | |
| 26 | 1 | 6 | Gregory Anodin | Mauritius | 1:00.98 | |
| 27 | 1 | 5 | James Sanderson | Gibraltar | 1:02.14 | |
| 28 | 1 | 2 | Dillon Gooding | Saint Vincent and the Grenadines | 1:04.05 | |
| | 2 | 7 | N'Nhyn Fernander | Bahamas | DNS | |

### Semifinals

The semifinals were held on 8 April at 20:53.

#### Semifinal 1

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 6 | Grant Irvine | Australia | 51.87 | Q |
| 2 | 5 | David Morgan | Australia | 52.48 | Q |
| 3 | 2 | Calum Jarvis | Wales | 53.33 | Q |
| 4 | 4 | Sean Campsie | Scotland | 53.40 | Q |
| 4 | 3 | Jacob Peters | England | 53.40 | Q |
| 6 | 7 | Ralph Goveia | Zambia | 54.10 | |
| 7 | 1 | Ryan Coetzee | South Africa | 54.17 | |
| 8 | 8 | James Brown | Northern Ireland | 55.13 | |

#### Semifinal 2

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | James Guy | England | 52.34 | Q |
| 2 | 3 | Chad Le Clos | South Africa | 52.56 | Q |
| 3 | 5 | Josiah Binnema | Canada | 53.41 | Q |
| 4 | 6 | Mackenzie Darragh | Canada | 53.43 | |
| 5 | 2 | Sajan Prakash | India | 54.12 | |
| 6 | 7 | Jie Chan | Malaysia | 54.56 | |
| 7 | 8 | Eben Vorster | South Africa | 54.75 | |
| 8 | 1 | Abeiku Jackson | Ghana | 54.79 | |

### Final

The final was held on 9 April at 21:59.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 6 | Chad Le Clos | South Africa | 50.65 | GR |
| | 5 | James Guy | England | 51.31 | |
| | 4 | Grant Irvine | Australia | 51.50 | |
| 4 | 3 | David Morgan | Australia | 51.94 | |
| 5 | 8 | Josiah Binnema | Canada | 53.11 | |
| 5 | 1 | Jacob Peters | England | 53.11 | |
| 7 | 2 | Calum Jarvis | Wales | 53.36 | |
| 8 | 7 | Sean Campsie | Scotland | 53.51 | |