First 3 in each heat (Q) and the next 6 fastest (q)

First 3 of each heat (Q) plus 6 fastest times (q) qualify to Semi-Final

POS Rank Heat BIB ATHLETE COUNTRY RESULTS ms*
1 1 3 3029 Jacory PATTERSON USAUSA 43.90 Q
2 1 6 3021 Khaleb MCRAE USAUSA 44.25 Q
3 1 5 2867 Zakithi NENE RSARSA 44.34 Q
4 1 2 2108 Bayapo NDORI BOTBOT 44.36 Q
5 2 3 2562 Rusheen MCDONALD JAMJAM 44.38 Q SB
6 2 2 2606 Yuki Joseph NAKAJIMA JPNJPN 44.44 Q NR .433
6 2 6 2104 Lee Bhekempilo EPPIE BOTBOT 44.44 Q .433
8 3 3 2531 Edoardo SCOTTI ITAITA 44.45 Q NR
9 4 3 2106 Busang Collen KEBINATSHIPI BOTBOT 44.48 q SB
10 1 4 2972 Christopher BAILEY USAUSA 44.49 Q
11 3 2 2564 Bovel MCPHERSON JAMJAM 44.51 Q PB
12 2 4 2035 Reece HOLDER AUSAUS 44.54 Q =SB
13 2 5 3027 Vernon NORWOOD USAUSA 44.55 Q .544
14 3 5 2463 Attila MOLNÁR HUNHUN 44.55 Q NR .548
15 3 4 3063 Muzala SAMUKONGA ZAMZAM 44.56 Q
16 4 5 2846 Ammar Ismail YAHIA IBRAHIM QATQAT 44.63 q PB
17 1 1 2932 Jereem RICHARDS TTOTTO 44.64 Q
18 3 6 2453 Kirani JAMES GRNGRN 44.66 Q
19 4 2 2379 Matthew HUDSON-SMITH GBRGBR 44.68 q
20 4 4 2389 Samuel REARDON GBRGBR 44.70 q
21 2 1 2870 Lythe PILLAY RSARSA 44.73 Q SB
22 4 6 2558 Delano KENNEDY JAMJAM 44.74 q PB
23 3 1 2370 Charles DOBSON GBRGBR 44.85 Q
24 5 5 2891 Rok FERLAN SLOSLO 44.91 q
25 5 2 2014 Elián LARREGINA ARGARG 44.97
26 4 1 2091 Daniel SEGERS BELBEL 45.04
27 5 6 2651 George MUTINDA KENKEN 45.07
28 5 1 2613 Fuga SATO JPNJPN 45.10 SB .092
29 6 2 2081 Alexander DOOM BELBEL 45.10 .099
30 6 1 2661 Brian Onyari TINEGA KENKEN 45.13
31 6 5 2847 Mihai Sorin DRINGO ROUROU 45.21
32 5 4 2461 Patrik Simon ENYINGI HUNHUN 45.25
33 6 6 2164 Christopher MORALES WILLIAMS CANCAN 45.26
34 6 4 2637 Kevin KIPKORIR KENKEN 45.39
35 7 1 2963 Oleksandr POHORILKO UKRUKR 45.44
36 7 2 2050 Cooper SHERMAN AUSAUS 45.53
37 7 4 2905 Lionel SPITZ SUISUI 45.57
38 7 6 2258 Alexander OGANDO DOMDOM 45.59
39 8 2 2751 Chidi OKEZIE NGRNGR 45.66
40 8 1 2806 Maksymilian SZWED POLPOL 45.67
41 5 3 2750 Samuel OGAZI NGRNGR 45.97 .961
42 8 4 2739 Eugene OMALLA NEDNED 45.97 .967
43 6 3 2405 Jean Paul BREDAU GERGER 46.05
44 7 5 2535 Luca SITO ITAITA 46.22
45 8 5 2576 Antonio WATSON JAMJAM 46.23
46 7 3 2740 Jonas PHIJFFERS NEDNED 46.26
47 8 6 2735 Isaya KLEIN IKKINK NEDNED 46.32
48 8 3 2700 Umar OSMAN MASMAS 46.43
Legend

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