| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* |
|---|---|---|---|---|---|---|---|
| 1 | 1 | 3 | 2731 | Håvard Bentdal INGVALDSEN |
NOR |
44.39 Q NR | |
| 2 | 1 | 2 | 2842 | Wayde VAN NIEKERK |
RSA |
44.57 Q | |
| 3 | 1 | 1 | 2060 | Steven GARDINER |
BAH |
44.65 Q | |
| 4 | 2 | 2 | 2349 | Matthew HUDSON-SMITH |
GBR |
44.69 Q SB | |
| 5 | 1 | 6 | 2099 | Bayapo NDORI |
BOT |
44.72 Q | |
| 6 | 1 | 5 | 2558 | Antonio WATSON |
JAM |
44.77 Q | .766 |
| 7 | 2 | 1 | 2589 | Kentaro SATO |
JPN |
44.77 Q NR | .767 |
| 8 | 3 | 2 | 2699 | Liemarvin BONEVACIA |
NED |
44.78 Q SB | |
| 9 | 4 | 2 | 2097 | Busang Collen KEBINATSHIPI |
BOT |
44.80 q PB | |
| 10 | 3 | 1 | 2431 | Attila MOLNÁR |
HUN |
44.84 Q NR | |
| 11 | 2 | 5 | 2989 | Quincy HALL |
USA |
44.86 Q | |
| 12 | 2 | 3 | 3018 | Vernon NORWOOD |
USA |
44.87 Q | |
| 13 | 4 | 1 | 2833 | Zakithi NENE |
RSA |
44.88 q | |
| 14 | 1 | 4 | 2413 | Kirani JAMES |
GRN |
44.91 Q | |
| 15 | 2 | 6 | 2079 | Alexander DOOM |
BEL |
44.92 Q PB | |
| 16 | 2 | 4 | 2588 | Fuga SATO |
JPN |
44.97 Q PB | |
| 17 | 3 | 4 | 2529 | Sean BAILEY |
JAM |
44.98 Q | |
| 18 | 5 | 1 | 2646 | Michael JOSEPH |
LCA |
45.04 q | |
| 19 | 3 | 6 | 2530 | Zandrion BARNES |
JAM |
45.05 Q | |
| 20 | 4 | 4 | 2511 | Davide RE |
ITA |
45.07 q SB | |
| 21 | 3 | 5 | 2582 | Yuki Joseph NAKAJIMA |
JPN |
45.15 Q | .147 |
| 22 | 3 | 3 | 2919 | Jereem RICHARDS |
TTO |
45.15 Q | .149 |
| 23 | 5 | 4 | 2101 | Leungo SCOTCH |
BOT |
45.20 q | |
| 24 | 4 | 3 | 2073 | Dylan BORLÉE |
BEL |
45.24 q | |
| 25 | 4 | 6 | 2389 | Manuel SANDERS |
GER |
45.34 | .339 |
| 25 | 4 | 6 | 2107 | Lucas CARVALHO |
BRA |
45.34 | .339 |
| 27 | 5 | 3 | 2956 | Oleksandr POHORILKO |
UKR |
45.37 | |
| 28 | 6 | 3 | 2798 | João COELHO |
POR |
45.38 | |
| 29 | 5 | 2 | 2019 | Elián LARREGINA |
ARG |
45.42 | |
| 30 | 4 | 5 | 2834 | Lythe PILLAY |
RSA |
45.58 | |
| 31 | 6 | 4 | 2722 | Dubem NWACHUKWU |
NGR |
45.60 | |
| 32 | 7 | 4 | 2216 | Gustav Lundholm NIELSEN |
DEN |
45.66 PB | |
| 33 | 5 | 5 | 2881 | Lionel SPITZ |
SUI |
45.69 | |
| 34 | 6 | 1 | 2859 | Aruna Dharshana SINGHAPURAGE |
SRI |
45.70 | |
| 35 | 7 | 1 | 2625 | Boniface Ontuga MWERESA |
KEN |
45.91 | |
| 36 | 6 | 6 | 2207 | Matěj KRSEK |
CZE |
45.99 | |
| 37 | 7 | 3 | 2068 | Jonathan JONES |
BAR |
46.03 | |
| 38 | 7 | 6 | 2982 | Bryce DEADMON |
USA |
46.20 | |
| 39 | 6 | 5 | 2793 | Karol ZALEWSKI |
POL |
46.53 | |
| 40 | 7 | 5 | 2477 | Christopher O'DONNELL |
IRL |
46.76 | |
| 41 | 6 | 2 | 2064 | Alonzo RUSSELL |
BAH |
46.95 | |
| 5 | 2067 | Desean BOYCE |
BAR |
DNF | |||
| 2 | 2186 | Anthony José ZAMBRANO |
COL |
DQ | |||
| 4 | 2889 | Carl BENGTSTRÖM |
SWE |
DQ | |||
| 3 | 2878 | Ricky PETRUCCIANI |
SUI |
DNS |
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second