Swimming at the 2017 World Aquatics Championships – Women's 50 metre butterfly explained

Event:	Women's 50 metre butterfly
Championship:	2017 World Aquatics Championships
Dates:	28 July (heats and semifinals) 29 July (final)
Venue:	Danube Arena
Location:	Budapest, Hungary
Competitors:	63
Nations:	55
Win Value:	24.60
Gold:	Sarah Sjöström
Gold Nation:	SWE
Silver:	Ranomi Kromowidjojo
Silver Nation:	NED
Bronze:	Farida Osman
Bronze Nation:	EGY
Prev:	2015
Next:	2019

The Women's 50 metre butterfly competition at the 2017 World Championships was held on 28 and 29 July 2017.^[1] ^[2]

Records

Prior to the competition, the existing world and championship records were as follows.

The following new records were set during this competition.

The heats were held on 28 July at 09:56.^[3]

Rank	Heat	Lane	Time	Notes
1	7	4	25.25	Q
2	7	5	25.65	Q
3	6	4	25.72	Q
4	7	2	25.73	Q, NR
5	5	4	25.74	Q
5	7	1	25.74	Q, AF
7	6	2	25.79	Q, NR
8	6	3	25.81	Q
9	5	5	25.82	Q, NR
10	6	5	25.87	Q
11	5	6	25.88	Q
12	7	6	25.91	Q
13	6	7	26.00	Q
14	7	3	26.03	Q
15	5	2	26.24	Q
16	5	3	26.34	Q
17	7	7	26.40
18	6	6	26.49
19	6	1	26.51
20	7	8	26.55
21	6	0	26.61
22	5	1	26.65
22	6	9	26.65
22	6	8	26.65
25	5	7	26.81
26	4	3	26.88
27	4	6	26.89
28	7	9	26.90
29	7	0	26.94
30	4	2	26.95	NR
31	5	9	27.15
32	4	4	27.23
33	4	1	27.35
34	4	8	27.36
35	5	8	27.37
36	4	7	27.47
37	3	4	27.78	NR
38	4	0	27.97	NR
39	3	5	28.22
39	3	6	28.22	NR
41	4	9	28.41
42	2	0	28.48
43	3	3	28.51
44	2	1	29.13
45	1	4	30.02	NR
45	3	7	30.02
47	3	2	30.18
48	2	6	30.77
49	2	4	30.89	NR
50	3	8	31.77
51	2	5	32.39	NR
52	3	9	32.61
53	2	3	33.05	NR
54	1	3	33.06
55	3	0	33.43
56	2	9	33.55	NR
57	2	7	34.09
58	2	2	35.69	NR
59	2	8	42.12	NR
	1	5
	3	1
	4	5
	5	0

The semifinals were held on 28 July at 18:46.^[4]

Rank	Lane	Time	Notes
1	4	25.57	Q
2	6	25.63	Q, NR
3	2	25.66	Q, NR
4	5	25.68	Q, NR
5	3	25.73	Q, AF
6	7	25.76
7	8	25.79
8	1	25.89

The final was held on 29 July at 17:32.^[5]