# Swimming at the 2013 World Aquatics Championships – Women's 400 metre freestyle

The women's 400 meter freestyle event in swimming at the 2013 World Aquatics Championships took place on 28 July at the Palau Sant Jordi in Barcelona, Spain.

## Records

Prior to this competition, the existing world and championship records were:
| World record | Federica Pellegrini (ITA) | 3:59.15 | Rome, Italy | 26 July 2009 |
| Competition record | Federica Pellegrini (ITA) | 3:59.15 | Rome, Italy | 26 July 2009 |

## Results
### Heats

The heats were held at 11:22.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 3 | 5 | Katie Ledecky | United States | 4:03.05 | Q |
| 2 | 4 | 6 | Melanie Costa | Spain | 4:04.20 | Q |
| 3 | 2 | 5 | Jazmin Carlin | Great Britain | 4:04.85 | Q |
| 4 | 3 | 3 | Lauren Boyle | New Zealand | 4:04.96 | Q |
| 5 | 2 | 3 | Kylie Palmer | Australia | 4:05.01 | Q |
| 6 | 4 | 4 | Camille Muffat | France | 4:05.53 | Q |
| 7 | 2 | 6 | Boglárka Kapás | Hungary | 4:05.61 | Q, NR |
| 8 | 3 | 2 | Andreina Pinto | Venezuela | 4:06.02 | Q, NR |
| 9 | 4 | 3 | Mireia Belmonte García | Spain | 4:06.76 | |
| 10 | 4 | 2 | Chloe Sutton | United States | 4:07.16 | |
| 11 | 3 | 7 | Martina de Memme | Italy | 4:08.42 | |
| 12 | 3 | 6 | Shao Yiwen | China | 4:09.16 | |
| 13 | 3 | 4 | Bronte Barratt | Australia | 4:09.65 | |
| 14 | 2 | 4 | Coralie Balmy | France | 4:10.70 | |
| 15 | 3 | 1 | Chihiro Igarashi | Japan | 4:12.44 | |
| 16 | 4 | 1 | Savannah King | Canada | 4:12.47 | |
| 17 | 4 | 7 | Ellie Faulkner | Great Britain | 4:13.18 | |
| 18 | 4 | 0 | Susana Escobar | Mexico | 4:13.37 | |
| 19 | 2 | 7 | Diletta Carli | Italy | 4:13.89 | |
| 20 | 2 | 2 | Zhang Wenqing | China | 4:14.66 | |
| 21 | 3 | 8 | Julia Hassler | Liechtenstein | 4:14.68 | |
| 22 | 2 | 9 | Lynette Lim | Singapore | 4:14.76 | |
| 23 | 2 | 1 | Sarah Köhler | Germany | 4:16.13 | |
| 24 | 4 | 8 | Nina Rangelova | Bulgaria | 4:18.94 | |
| 25 | 4 | 9 | Kyna Pereira | South Africa | 4:19.66 | |
| 26 | 2 | 8 | Natthanan Junkrajang | Thailand | 4:19.77 | |
| 27 | 1 | 5 | Katya Bachrouche | Lebanon | 4:20.46 | |
| 28 | 2 | 0 | Tjasa Oder | Slovenia | 4:20.82 | |
| 29 | 3 | 0 | Carolina Bilich | Brazil | 4:21.40 | |
| 30 | 3 | 9 | Khoo Cai Lin | Malaysia | 4:23.67 | |
| 31 | 1 | 3 | Andrea Cedrón | Peru | 4:28.78 | |
| 32 | 1 | 4 | Raina Ramdhani | Indonesia | 4:29.61 | |
| 33 | 1 | 6 | Daniela Benavides | Cuba | 4:35.85 | |
| 34 | 1 | 2 | Alexis Clarke | Barbados | 4:42.82 | |
| 35 | 1 | 1 | San Khant Khant Su | Myanmar | 4:54.89 | |
| 36 | 1 | 7 | Monica Saili | Samoa | 4:55.49 | |
| 37 | 1 | 8 | Victoria Chentsova | Northern Mariana Islands | 4:59.78 | |
| | 4 | 5 | Lotte Friis | Denmark | | DNS |

### Final

The final was held at 18:57.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Katie Ledecky | United States | 3:59.82 | AM |
| | 5 | Melanie Costa | Spain | 4:02.47 | NR |
| | 6 | Lauren Boyle | New Zealand | 4:03.89 | |
| 4 | 3 | Jazmin Carlin | Great Britain | 4:04.03 | |
| 5 | 1 | Boglárka Kapás | Hungary | 4:05.90 | |
| 6 | 8 | Andreina Pinto | Venezuela | 4:07.14 | |
| 7 | 7 | Camille Muffat | France | 4:07.67 | |
| 8 | 2 | Kylie Palmer | Australia | 4:08.13 | |