| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* |
|---|---|---|---|---|---|---|---|
| 1 | 1 | 2 | 1337 | Michael NORMAN |
USA |
44.10 Q SB | |
| 2 | 1 | 4 | 1309 | Quincy HALL |
USA |
44.28 Q | |
| 3 | 2 | 2 | 1257 | Jereem RICHARDS |
TTO |
44.31 Q | |
| 4 | 3 | 2 | 407 | Busang Collen KEBINATSHIPI |
BOT |
44.45 Q PB | |
| 5 | 2 | 4 | 1082 | Samuel OGAZI |
NGR |
44.50 Q PB | |
| 6 | 3 | 4 | 333 | Reece HOLDER |
AUS |
44.53 Q PB | |
| 7 | 1 | 3 | 1378 | Muzala SAMUKONGA |
ZAM |
44.56 Q | |
| 8 | 4 | 2 | 1170 | Ammar Ismail YAHIA IBRAHIM |
QAT |
44.66 Re PB | |
| 9 | 5 | 2 | 886 | Sean BAILEY |
JAM |
44.68 Re | |
| 10 | 1 | 5 | 792 | Kirani JAMES |
GRN |
44.78 Q | .772 |
| 11 | 1 | 1 | 705 | Matthew HUDSON-SMITH |
GBR |
44.78 Q | .774 |
| 12 | 2 | 3 | 410 | Bayapo NDORI |
BOT |
44.87 Q | |
| 13 | 2 | 1 | 1289 | Christopher BAILEY |
USA |
44.89 Q | |
| 14 | 1 | 6 | 697 | Charles DOBSON |
GBR |
44.96 Q | .957 |
| 15 | 2 | 5 | 463 | Christopher MORALES-WILLIAMS |
CAN |
44.96 Q | .960 |
| 16 | 3 | 3 | 870 | Luca SITO |
ITA |
44.99 Q | .981 |
| 17 | 3 | 5 | 1213 | Aruna Dharshana SINGHAPURAGE |
SRI |
44.99 Q PB | .989 |
| 18 | 4 | 5 | 1184 | Zakithi NENE |
RSA |
45.01 Re | .002 |
| 19 | 2 | 6 | 380 | Alexander DOOM |
BEL |
45.01 Q | .010 |
| 20 | 4 | 3 | 740 | Jean Paul BREDAU |
GER |
45.07 Re | |
| 21 | 4 | 4 | 388 | Jonathan SACOOR |
BEL |
45.08 Re | |
| 22 | 5 | 4 | 561 | Alexander OGANDO |
DOM |
45.11 Re SB | |
| 23 | 3 | 6 | 910 | Jevaughn POWELL |
JAM |
45.12 Q | |
| 24 | 6 | 2 | 803 | Attila MOLNÁR |
HUN |
45.24 Re | |
| 25 | 5 | 5 | 414 | Leungo SCOTCH |
BOT |
45.28 Re | |
| 26 | 4 | 6 | 1155 | João COELHO |
POR |
45.35 Re SB | |
| 27 | 5 | 3 | 374 | Dylan BORLÉE |
BEL |
45.36 Re | |
| 28 | 6 | 3 | 939 | Yuki Joseph NAKAJIMA |
JPN |
45.37 Re | |
| 29 | 3 | 1 | 1093 | Håvard Bentdal INGVALDSEN |
NOR |
45.46 Q | |
| 30 | 7 | 2 | 521 | Anthony José ZAMBRANO |
COL |
45.49 Re | |
| 31 | 4 | 1 | 1085 | Chidi OKEZIE |
NGR |
45.52 Re | |
| 32 | 5 | 6 | 1203 | Cheikh Tidiane DIOUF |
SEN |
45.59 Re | |
| 33 | 5 | 1 | 946 | Kentaro SATO |
JPN |
45.60 Re | .595 |
| 34 | 7 | 3 | 1187 | Lythe PILLAY |
RSA |
45.60 Re | .596 |
| 35 | 8 | 2 | 1010 | Michael JOSEPH |
LCA |
45.69 Re | |
| 36 | 6 | 1 | 1284 | Oleksandr POHORILKO |
UKR |
45.71 Re | .703 |
| 37 | 8 | 3 | 542 | Matěj KRSEK |
CZE |
45.71 Re | .708 |
| 38 | 6 | 5 | 1227 | Lionel SPITZ |
SUI |
45.81 Re | |
| 39 | 7 | 5 | 420 | Lucas CARVALHO |
BRA |
45.85 Re | |
| 40 | 7 | 1 | 917 | Deandre WATKIN |
JAM |
45.97 Re | |
| 41 | 6 | 6 | 945 | Fuga SATO |
JPN |
46.13 Re | |
| 42 | 7 | 6 | 638 | Gilles BIRON |
FRA |
46.19 Re | |
| 43 | 8 | 5 | 864 | Davide RE |
ITA |
46.74 Re | |
| 44 | 6 | 4 | 314 | Elián LARREGINA |
ARG |
47.80 Re | |
| 6 | 965 | Zablon Ekhal EKWAM |
KEN |
DNF | |||
| 4 | 361 | Steven GARDINER |
BAH |
DNS |
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second