First 2 in each heat (Q) and the next 2 fastest (q)

First 2 of each heat (Q) plus 2 fastest times (q) qualify to Final

POS Rank Heat BIB ATHLETE COUNTRY RESULTS ms*
1 1 3 472 Lurdes Gloria MANUEL CZECZE 51.91 Q
2 2 3 818 Ella ONOJUVWEVWO NGRNGR 51.99 Q
3 1 1 1003 Zaya AKINS USAUSA 52.11 Q
4 2 1 721 Elisa VALENSIN ITAITA 52.23 Q NU20R
5 1 2 407 Dianna PROCTOR CANCAN 52.59 Q PB
6 2 2 622 Johanna MARTIN GERGER 52.69 Q
7 3 3 1039 Michaela MOUTON USAUSA 52.72 q
8 3 2 578 Charlotte HENRICH GBRGBR 52.74 q
9 3 1 441 Paola LOBOA COLCOL 53.17
10 4 3 926 Karolina ZBIÄŒAJNIK SLOSLO 53.19 SB
11 5 3 862 Dominika DURAJ POLPOL 53.35
12 6 3 335 Amelia ROWE AUSAUS 53.47
13 4 1 331 Jemma POLLARD AUSAUS 53.49
14 4 2 843 Madeleine WADDELL NZLNZL 53.50 PB
15 5 2 436 Nahomy CASTRO COLCOL 53.75
16 6 2 665 Zita SZENTGYÖRGYI HUNHUN 53.94
17 7 2 889 Maria Denisa CAPOTÄ‚ ROUROU 53.96 PB
18 5 1 829 Borghild Oline HOLSTAD NORNOR 53.99 PB .987
19 7 3 824 Line Safaa AL-SAIDDI NORNOR 53.99 .990
20 6 1 575 Kara DACOSTA GBRGBR 54.24
21 7 1 749 Shanque WILLIAMS JAMJAM 54.47
22 8 2 906 Precious MOLEPO RSARSA 54.55
23 8 3 1050 Jonbibi HUKMOVA UZBUZB 54.87
24 8 1 385 Julia Aparecida ROCHA BRABRA 55.12
Legend

ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second